Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing, UT

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2.14: Resonance Another <strong>for</strong>m wave interference occurred when the normal incidence and reflected plane wave interact within a narrow parallel interface. When the phase of the reflected wave match that of incoming incident wave, the amplitude of the superimposed wave doubling, creating a standing wave. http://hyperphysics.phy-astr.gsu.edu/hbase/waves/string.html#c3 Resonance occurred when the thickness of the material is equal to half the wave length or multiple of it. It also occur when longitudinal wave travel thru a thin sheet of materials during immersion testing.
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Preparatory Notes for ASNT NDT Leve
Page 6 and 7:
Numerical Prefix • Micro - (µ) a
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Contents: 1. ASNT Level III Exam To
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4. Interpretation/Evaluations • E
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UT - Ultrasonic Testing Length: 4 h
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3. Techniques/Calibrations •Conta
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ASME V Article Numbers: Gen Article
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Other Reading • http://techcorr.c
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Content: Section 1: Introduction 1.
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Content: Section 3: Equipment & Tra
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Content: Section 4: Calibration Met
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Content: Section 6: Selected Applic
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Section 1: Introduction
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1.1: Basic Principles of Ultrasonic
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In ultrasonic testing, the reflecte
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Basics of Ultrasonic Test- Contact
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Basics of Ultrasonic Test- A-Scan
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Source-2: The advantages of ultraso
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• Operation is electronic, which
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1.3: Limitations (Disadvantages) As
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Content: Section 2: Physics of Ultr
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Ultrasonic Formula
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Parameters of Ultrasonic Waves
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Acoustic Spectrum
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Acoustic Spectrum
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Acoustic Wave - Node and Anti-Node
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Q151 A point, line or surface of a
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2.2.2 Propagation & Polarization Ve
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Longitudinal and shear waves- Defin
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Longitudinal and shear waves
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In longitudinal waves, the oscillat
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Longitudinal Wave
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Shear waves vibrate particles at ri
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In the transverse or shear wave, th
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2.2.5 Rayleigh Characteristics Rayl
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Rayleigh waves
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Surface (or Rayleigh) waves travel
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The major axis of the ellipse is pe
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Surface wave or Rayleigh wave are f
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Surface wave - Following Contour Su
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Rayleigh Wave http://web.ics.purdue
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Love Wave
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At this depth, wave energy is about
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Q: Which of the following modes of
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Since the 1990s, the understanding
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Plate or Lamb waves are the most co
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Plate wave or Lamb wave are formed
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When guided in layers they are refe
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Symmetrical = extensional mode Asym
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Other Reading: Lamb Wave Lamb waves
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Fig. 4 Diagram of the basic pattern
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2.2.7 Dispersive Wave: Wave modes s
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Plate or Lamb waves are generated a
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2.3: Sound Propagation in Elastic M
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Spring model- A mass on a spring ha
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Elastic Model
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Elastic Model / Longitudinal Wave
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Elastic Model / Shear Wave
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Since the mass m and the spring con
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Elastic constant → spring constan
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Q163 Acoustic velocity of materials
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When calculating the velocity of a
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It must also be mentioned that the
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Longitudinal Wave Velocity: V L The
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2.4: Properties of Acoustic Plane W
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http://www.ndt-ed.org/EducationReso
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Java don’t work? Uninstalled →
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Java don’t work? http://jingyan.b
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Java don’t work? http://jingyan.b
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The velocities sound waves The velo
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2.5: Wavelength and Defect Detectio
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Keywords: • Discontinuity must be
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Keywords: • Coarse grains →Lowe
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Coarse grains →Lower frequency to
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Keywords: • Higher the frequency,
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2.5.3 Further Reading Detectability
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Determining cross sectional area us
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“Sonic pulse volume” and S/N (d
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2.6: Attenuation of Sound Waves 2.6
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Absorption: Sound attenuations are
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Anisotropic Columnar Grains with di
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The amplitude change of a decaying
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Attenuation is generally proportion
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Amplitude at distance Z where: Wher
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2.6.2 Factors Affecting Attenuation
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2.6.4 Further Reading on Attenuatio
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Q168: Heat conduction, viscous fric
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2.7: Acoustic Impedance Acoustic im
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Sound travels through materials und
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Reflection/Transmission Energy as a
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Q2.8: The acoustic impedance of mat
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When the acoustic impedances of the
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Reflection Coefficient:
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Using the above applet, note that t
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Incident Wave other than Normal? -
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Q: The figure above shown the parti
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For example: The dB loss on transmi
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Q6: For an ultrasonic beam with nor
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Refraction and Snell's Law When an
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Refraction takes place at an interf
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Snell's Law describes the relations
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Snell Law http://www.ndt-ed.org/Edu
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When a longitudinal wave moves from
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Refraction and mode conversion occu
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For example, calculate the first cr
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Snell Law: 1 st / 2 nd Critical Ang
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Q. Both longitudinal and shear wave
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Typical angle beam assemblies make
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Depth & Skip
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Second Critical Angle The second cr
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2.10: Mode Conversion When sound tr
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In the previous section, it was poi
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Snell's Law
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Reflections
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V S1 V S2
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Snell Law- 1 st & 2 nd Critical Ang
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Transverse wave can be introduced i
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Calculate the offset for following
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Refraction and mode conversion at n
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Refraction and mode conversion at n
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Q1. From the above figures, if the
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Q: On Calculation: Incident angle=
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Q1. If you were requested to design
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2.11: Signal-to-Noise Ratio In a pr
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The following formula relates some
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Rather than go into the details of
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Determining cross sectional area us
Page 275 and 276:
“Sonic pulse volume” and S/N (d
Page 277 and 278: Pulse Length
Page 279 and 280: 2.12: The Sound Fields 2.12.1 Wave
Page 281 and 282: When waves interact, they superimpo
Page 283 and 284: UT Transducer http://www.fhwa.dot.g
Page 285 and 286: UT Transducer
Page 287 and 288: Wave Interaction Complete in-phase
Page 289 and 290: With an ultrasonic transducer, the
Page 291 and 292: 29. It is possible for a discontinu
Page 293 and 294: 2.12.2 Variations in sound intensit
Page 295 and 296: The sound wave exit from a transduc
Page 297 and 298: The Near Field (Fresnel) and the Fa
Page 299 and 300: Amplitude ← Near Field Effect: Be
Page 301 and 302: Near field (near zone) or Fresnel z
Page 303 and 304: Near/ Far Fields http://miac.unibas
Page 305 and 306: where α is the radius of the trans
Page 307 and 308: The curvature and the area over whi
Page 309 and 310: Fresnel & Fraunhofer Zone
Page 311 and 312: Fresnel & Fraunhofer Zone http://st
Page 313 and 314: Q4: A transducer has a near field i
Page 315 and 316: 2.12.4 Dead Zone In ultrasonic test
Page 317 and 318: Dead Zone -The initial pulse is a t
Page 319 and 320: Dead Zone Illustration http://www.n
Page 321 and 322: Q: On an A-scan display, the “dea
Page 323 and 324: 2.13: Inverse Square Rule/ Inverse
Page 325 and 326: Small Reflector, a reflector smalle
Page 330 and 331: Fundamental Frequency The lowest re
Page 332 and 333: Transducers Piezoelectric Thickness
Page 334 and 335: Application Case#1: The specimen's
Page 336 and 337: Application Case#2: Electromagnetic
Page 338 and 339: Q7: The resonance frequency of 2cm
Page 340 and 341: dB is a measures of ratio of 2 valu
Page 342 and 343: The Decibel The equation used to de
Page 344 and 345: Why is the dB unit used? Use of dB
Page 346 and 347: Use of the dB in Sound Measurements
Page 348 and 349: Since transducers and microphones p
Page 350 and 351: Sound Levels- Relative
Page 352 and 353: Practice:
Page 354: “Absolute" Sound Levels Whenever
Page 357 and 358: Absolute: The standard reference so
Page 359 and 360: Exercise: ANSWER Find the absolute
Page 361 and 362: Relative dB: Example Calculation 1
Page 363 and 364: Example Calculation 3 Consider the
Page 365 and 366: 2.16 Practice Makes Perfect
Page 367 and 368: Q104: If an ultrasonic wave is tran
Page 369 and 370: 学习总是开心事
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Section 3: Equipment & Transducers
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Wavelength in mm for Steel
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3.10: Pulser-Receivers 3.11: Tone B
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• Sensitivity is the ability of t
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Bandwidth (BW) - the difference bet
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This alignment of molecules will ca
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Transducer Effectiveness The effect
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Piezoelectric crystals http://www.n
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Piezoelectric crystals
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The thickness of the active element
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At Interface: Reflection & Transmit
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At Interface: Reflection & Transmit
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Piezoelectric crystals may be X or
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Q153 A quartz crystal cut so that i
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3.1.1: Type of Piezoelectric Crysta
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Quartz
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■ Lithium Sulphate LiSO 4 , grows
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Followings are Piezoelectric crysta
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BaTiO 3
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■ Lead Metaniobate (PBNbO 6 ) cry
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Fig. 4: Comparison between lead Met
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■ Lead Zirconate Titanate PZT Cur
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350°C is also goof for:
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Curie Temperature: In physics and m
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Lead zirconium Titanate PZT http://
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Properties of Piezoelectric Materia
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Q67: Which of the following transdu
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Q21: An advantage of using a cerami
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3.2: Characteristics of Piezoelectr
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Transducer PZT & Matching Layer Thi
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Contact Transducer Types: socket cr
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Transducer: Straight Beam
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Transducer Cut-Out
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3.2.3 Design of Matching Layer The
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3.2.4 Backing (Damping) The backing
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3.2.5 Wear Plate The basic purpose
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When signals are in phase, their am
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Transducers http://www.ndt-kits.com
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Resolution: BS4331 Pt 3. the recomm
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In the early days of ultrasonic tes
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Transducer Damping (illustration wi
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Transducer Damping Narrow bandwidth
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Transducer Damping
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Transducer Damping at -14dB
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Transducer Damping- Pulse Length
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Transducer Damping- Low Damping (X-
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48. A more highly damped transducer
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Bandwidth: • The unit for bandwid
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Bandwidth (BW) - the difference bet
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The relation between MHz bandwidth
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The approximate relations shown in
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Instrumentation Band Width:
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Q164: The resolving power of a tran
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3.3: Radiated Fields of Ultrasonic
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The pressure waves combine to form
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Angular characteristics for large d
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Angular characteristics: Spatial di
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Angular characteristics: Sound pres
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http://www.ndt-ed.org/EducationReso
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Beam Spreads http://www.eclipsescie
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Probe Dimension & Spread angle 探
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Probe dimension & Z f, , Ɵ 探子
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Although beam spread must be consid
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Near/ Far Fields Near field, constr
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For a flat piston source transducer
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3.5.1 Contact transducers are used
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Contact probe
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Practice Makes Perfect 43. Which of
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Unfocused & Focused
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Focused Transducer (Olympus) Z B F
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Focal Length Variations Focal Lengt
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This change in the focal length can
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Cylindrical & Spherical Focused
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Q18: Which of the following is an a
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3.5.3 Dual element transducers cont
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The Perspex shoes hold the crystals
Page 538 and 539:
Other Reading (Olympus): Dual eleme
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Figure (13).
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Duo Elements Transducer
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Delay Lined Transducer: Advantages:
Page 546 and 547:
Delay Lined Transducer
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TR-Probe / Dual Crystal Probe- Tran
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Cross Talk at High Gain
Page 553 and 554:
Probe Delay
Page 555 and 556:
3.5.5 Angle beam transducers Angle
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Angle Beam Transducers- Angle beam
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Angle Beam Transducers ϴ 1L ϴ 2L
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Angle Beam Transducers- Common Term
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Angle Beam Transducers- Longitudina
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3.5.6 Normal incidence shear wave t
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Normal incidence shear wave transdu
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3.5.7 Paint brush transducers Paint
Page 579 and 580:
3.5.8 Wheel Transducer Wheel Transd
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UT Technician At works- Salute!
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Manufacturers often provide time an
Page 585 and 586:
Excitation: Spiked Pulser (negative
Page 587 and 588:
Pulse energy: Broad band versus Nar
Page 589 and 590:
Other tests may include the followi
Page 591:
Effects of Probe Sizes: 1. The larg
Page 595 and 596:
Shock excitation
Page 597 and 598:
Frequency Response--The frequency r
Page 599 and 600:
3.7: Transducer Modeling In high-te
Page 601 and 602:
The Thompson-Gray Measurement Model
Page 603 and 604:
Couplant
Page 605 and 606:
Squirter Column (bubbler)- Water as
Page 607 and 608:
Couplant
Page 609 and 610:
3.9: Electromagnetic Acoustic Trans
Page 611 and 612:
F is the body force per unit volume
Page 613 and 614:
A number of practical EMAT configur
Page 615 and 616:
Comparison between EMAT and Piezoel
Page 617 and 618:
Challenges and Disadvantages The di
Page 619 and 620:
http://mdienergy.com/emat.html
Page 621 and 622:
EMAT Transducer http://www-ndc.me.e
Page 623 and 624:
Cross-sectional view of a normal fi
Page 625 and 626:
Cross-sectional view of a meander c
Page 627 and 628:
Practical EMAT designs are relative
Page 629 and 630:
The pulser section of the instrumen
Page 631 and 632:
Pulse characteristics Pulse energy
Page 633 and 634:
Pulse Length: BS EN 12668- Part 1 I
Page 636 and 637:
Pulse Length
Page 638 and 639:
Pulse Length
Page 640 and 641:
Pulse Length and Wave form
Page 642 and 643:
Wave form Quality Factor
Page 644 and 645:
Pulse-Echo mode of operation, narro
Page 646 and 647:
Modulus of the electrical impedance
Page 648 and 649:
Transducers
Page 650 and 651:
In the receiver section the voltage
Page 652 and 653:
Pulse/Beam Characteristics High fre
Page 654 and 655:
Frequency - The number of wave cycl
Page 656 and 657:
Sensitivity - The relationship betw
Page 658 and 659:
Focusing - Immersion transducers ca
Page 660 and 661:
Q15: A significant limitation of a
Page 662 and 663:
Tone burst generators
Page 664 and 665:
3.12: Arbitrary Function Generators
Page 666 and 667:
In spread spectrum ultrasonics (see
Page 668 and 669:
Data Signals: Input versus Output C
Page 670 and 671:
Shielding is normally specified as
Page 672 and 673:
3.14 Transducer Quality Factor “Q
Page 674 and 675:
Quality Factor “Q” High quality
Page 676 and 677:
Data Presentation: A, B and C-scan
Page 678 and 679:
3.15.1 A-Scan Presentation The A-sc
Page 680 and 681:
A-Scan
Page 682 and 683:
In the illustration of the A-scan p
Page 684 and 685:
B-Scan
Page 686 and 687:
B-Scan Presentation The B-scan pres
Page 688 and 689:
B-Scan
Page 690 and 691:
3.15.3 C-Scan Presentation The C-sc
Page 692:
C-Scan
Page 695 and 696:
High resolution scans can produce v
Page 697 and 698:
C-Scan Recording
Page 699 and 700:
3.15.4 The D scan- The D scan gives
Page 701 and 702:
AUT Displays
Page 703 and 704:
In the pulse-echo method, it is nec
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Fig. 12.2 Shadow method with reflec
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3.16 Testing Techniques 3.16.1 Puls
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Through Transmission Techniques
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3.16.3 The Tandem Techniques The ta
Page 714 and 715:
3.16.4 Immersion Methods In immersi
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¼ T T
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3.17.1 Instrument Circuitry: Althou
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Instrument Circuitry: Screen pictur
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Instrument Circuitry: Receiver-ampl
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Instrument Circuitry: Image- and Da
Page 726 and 727:
Instrument Circuitry: Pulse Repetit
Page 728 and 729:
3.17.2 Instrument Control: Even tho
Page 730 and 731:
Instrument Control: DELAY and RANGE
Page 732 and 733:
Instrument Control: Display Control
Page 734 and 735:
Instrument Controls: • A marker c
Page 736 and 737:
Instrument Control: Gates Most UT e
Page 738 and 739:
Figure above Block diagram circuitr
Page 741 and 742:
Pulse Repetition Rate - Gain - Freq
Page 743 and 744:
A basic instrument contains several
Page 745 and 746:
Applications. The chief value of B-
Page 747 and 748:
• First, the display is generated
Page 749 and 750:
Signal Display. The oscilloscope sc
Page 751 and 752:
Typical C-scan setup, including dis
Page 753 and 754:
Gating. (Depth Gate) An electronic
Page 755 and 756:
Q1: In an ultrasonic test system wh
Page 757 and 758:
Q30: The time from the start of the
Page 759 and 760:
Q166: In a basic pulse echo instrum
Page 761 and 762:
121. In an ultrasonic instrument, t
Page 763 and 764:
125. In a basic pulse echo ultrason
Page 765 and 766:
3.18.2 Reflection 西塘
Page 767 and 768:
How do reflection, refraction, and
Page 769 and 770:
3.18.3 Refraction happens when ligh
Page 771 and 772:
Diffraction
Page 773 and 774:
Diffraction
Page 775 and 776:
Diffraction
Page 777 and 778:
Diffraction happen when light tries
Page 779 and 780:
3.18.5 Interference
Page 781 and 782:
Interference
Page 783 and 784:
Q11: When maximum sensitivity is re
Page 785 and 786:
Q3: The ultrasonic instrument used
Page 787 and 788:
Q15: Entry surface resolution is a
Page 789 and 790:
Expert at Works-Salute!
Page 793 and 794:
Section 4: Calibration Methods
Page 795 and 796:
4.1: Calibration Methods Calibratio
Page 797 and 798:
In ultrasonic testing, there is als
Page 799 and 800:
Introduction to the Common Standard
Page 801 and 802:
The IIW Type Calibration Block
Page 803 and 804:
The IIW Type I Calibration Block
Page 805 and 806:
The IIW Phase Array Calibration Blo
Page 807 and 808:
The IIW Calibration Block 2 nd Chec
Page 811 and 812:
Find probe angle Find Index/Range/R
Page 813 and 814:
V2 Calibration Block
Page 815 and 816:
Calibration Blocks
Page 817 and 818:
The standard shown in the above fig
Page 819 and 820:
IIW Blocks- IIW Type US-2
Page 821 and 822:
V1/5, A2 Block
Page 823 and 824:
DSC Block, Mini block, Rompas Block
Page 825 and 826:
A block that closely resembles the
Page 827 and 828:
Calibration Range Using DSC AWS Blo
Page 829 and 830:
AWS Shear Wave Distance Calibration
Page 831 and 832:
AWS Resolution Calibration (RC) Blo
Page 833 and 834:
30 FBH Resolution Reference Block T
Page 835 and 836:
Step and Tapered Calibration Wedges
Page 837 and 838:
Area Amplitude Blocks provide stand
Page 839 and 840:
The ASTM basic set of Area/Distance
Page 841 and 842:
ASTM E 127
Page 843 and 844:
Distance-Amplitude #3, #5, #8 FBH B
Page 845 and 846:
Q56: On the area-amplitude ultrason
Page 847 and 848:
4.2: The Calibrations 4.2.1: Distan
Page 849 and 850:
http://www.huatecgroup.com/china-di
Page 851:
DAC- Distance Amplitude Correction
Page 854 and 855:
The following applet shows a test b
Page 856 and 857:
Developing a Distance Amplitude Cor
Page 858 and 859:
Back Wall Echo
Page 860 and 861:
2.) This example represents the use
Page 862 and 863:
4.) With no further adjustments to
Page 864 and 865:
Plotting DAC Curve
Page 866 and 867:
DAC Curve
Page 869 and 870:
Birring NDT Series, Ultrasonic Dist
Page 871 and 872:
4.2.2: Finding the probe index
Page 873 and 874:
Exit Point- A5 Block
Page 875 and 876:
Checking the probe angle
Page 877 and 878:
Probe Angles- A5 Block
Page 879 and 880:
Calibration of shear waves for rang
Page 881 and 882:
Echo from 100mm circular Section
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50 mm radius from V2 Block
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Exit Point /Range/Probe Angle calib
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Dead Zone Determine the dead zone b
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20 dB Profile Probe Beam Line of Sy
Page 895 and 896:
4.2.7: Transfer Correction Methods
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Example: 0 degree Probe Calibration
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Transfer and Attenuation Correction
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4.2.8.1: Linearity of time base Gen
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Ultrasonic Testing - Horizontal Lin
Page 909:
Tolerance Frequency of checking The
Page 914 and 915:
Figure 6 — General purpose set-up
Page 916:
Method A: 6.3.2.1 Apparatus—A tes
Page 919 and 920:
Q61: The vertical linear range of a
Page 921 and 922:
4.3: Curvature Correction Curvature
Page 923 and 924:
Concave surfaces work to focus the
Page 925 and 926:
Convex surfaces work to defocus the
Page 927 and 928:
Q: In transmitting sound energy int
Page 929 and 930:
The resulting model allows computat
Page 931 and 932:
Curvature Corrections
Page 933 and 934:
Curvature Correction
Page 935 and 936:
4.4: Calibration References & Stand
Page 937 and 938:
Reference Reflectors: are used as a
Page 939 and 940:
Reference Reflectors are used as a
Page 941 and 942:
Q80: The 50 mm diameter hole in an
Page 943 and 944:
4.6: Video Time http://v.pps.tv/pla
Page 945:
Birring NDT Series, Ultrasonic Test
Page 951 and 952:
Content: Section 5: Measurement Tec
Page 953 and 954:
5.1: Normal Beam Inspection Pulse-e
Page 955 and 956:
A-Scan
Page 957 and 958:
Precision ultrasonic thickness gage
Page 959 and 960:
5.2: Angle Beams I Angle Beam Trans
Page 961:
Angle Beam Transducers and wedges a
Page 964 and 965:
Flaw Location and Echo Display
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Dead Zone
Page 972 and 973:
Flaw Location
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Flaw Location with Angle Beam Trans
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Flaw Location with Angle Beam Trans
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The angled sound beam is highly sen
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How they work -- Snell's Law A soun
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There are two advantages to designi
Page 984 and 985:
Contoured wedges
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Focused dual element angle beams Th
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threaded snap-in steel with a shear
Page 990 and 991:
Crack Tip Diffraction Methods No an
Page 992 and 993:
Crack Tip Diffraction Method The eq
Page 994 and 995:
6 dB Drop Method
Page 996 and 997:
6 dB Drop Method www.youtube.com/em
Page 998 and 999:
5.3.3 The 20 dB drop sizing method
Page 1000 and 1001:
20 dB Drop Sizing- For Small Reflec
Page 1002 and 1003:
Move the probe to the other side of
Page 1004 and 1005:
Note that we have only drawn the be
Page 1006 and 1007:
5.3.4 Equalization Back Wall Sizing
Page 1008 and 1009:
5.3.6 The DGS Method Distance Gain
Page 1010 and 1011:
Automatic Scanning
Page 1012 and 1013:
Dripless Bubbler
Page 1014 and 1015:
The second major consideration is h
Page 1016 and 1017:
Pulse-Echo and Pulse-Echo-Overlap M
Page 1018 and 1019:
EMATs http://www.resonic.com/error%
Page 1020 and 1021:
EMAT Driver Frequency: 450-600 KHz
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5.6: Attenuation Measurements Ultra
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The most common method used to get
Page 1026 and 1027:
Attenuation:
Page 1028 and 1029:
Section of bi-phase modulated sprea
Page 1030 and 1031:
Spread Spectrum UT
Page 1032 and 1033:
Two discrimination technique are te
Page 1034 and 1035:
5.8: Signal Processing Techniques S
Page 1036 and 1037:
The frequency domain display shows
Page 1038 and 1039:
Fourier Analysis
Page 1040 and 1041:
The following Fourier Java applet,
Page 1042 and 1043:
5.9: Scanning Methods Direct contac
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Pulse Echo Method: Sound pressure o
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Pulse Echo Method
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Pulse Echo Method
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Amplitude loss: Inverse Square Law
Page 1052 and 1053:
Influence of reflector orientation
Page 1054 and 1055:
Pulse Echo Method IP BE F plate del
Page 1056 and 1057:
5.9.2 Pitch-Catch Methods Advantage
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Pitch-Catch Methods- Through Transm
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5.9.2.2 Pitch-Catch Methods- Tandem
Page 1062 and 1063:
Distance Between Transmitter / Rece
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5.9.3 Immersion Methods Many of the
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Immersion Methods- Since sound wave
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Modified Immersion Methods- Bubbler
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Angle Beam Immersion Methods Note t
Page 1072 and 1073:
Angle Beam Immersion Methods- Pipe
Page 1074 and 1075:
Immersion Testing Set-up
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Manipulators The manipulator is pri
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Bridges When the manipulator is aut
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Immersion Testing Set-up Manipulato
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Immersion Testing Set-up Manipulato
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An unfocused transducer may be used
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Focus may be designated in three wa
Page 1088 and 1089:
Q: In immersion testing, to remove
Page 1090 and 1091:
Q2: In an immersion test of a piece
Page 1092 and 1093:
Q176: To evaluate and accurately lo
Page 1094 and 1095:
5.10: Scanning Patterns
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5.11: Pulse Repetition Rate and Pen
Page 1098 and 1099:
Pulse Repetition Rate and Penetrati
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Pulse-Length and Near Surface Sensi
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5.12: Interferences & Non-Relevant
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Specimen Surface Interference Exces
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Specimen Surface Interference- You
Page 1108 and 1109:
Material Geometric Interference Fal
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Non Relevant Indication Large grain
Page 1112 and 1113:
Non Relevant Indications The geomet
Page 1114 and 1115:
Entry surface variables: Surface ro
Page 1116 and 1117:
Whether uniform or irregular, a rou
Page 1118 and 1119:
Keywords on Rough Surface: 1. The d
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The coating is sufficiently thin th
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5.13.3 Couplant Condition Both cont
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In more practical terms, for water
Page 1126 and 1127:
For example the plastics listed in
Page 1128 and 1129:
Like the decibel, the Neper is a un
Page 1130 and 1131:
Hence:
Page 1132 and 1133:
5.14 The Concept of Effective Dista
Page 1134 and 1135:
Q&A on The Concept of Effective Dis
Page 1136 and 1137:
Q2: A steel bar with 200 mm thick i
Page 1138 and 1139:
Q4: Assuming that Minimum 3 pulses
Page 1140 and 1141:
Q6: What is the maximum PRR is need
Page 1142 and 1143:
Q7: A steel plate size 6.2 m ×1.8
Page 1144 and 1145:
5.15: Questions & Answers Exercises
Page 1146 and 1147:
Compared 6 dB Drop Sizing with Equa
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Q5: Ultrasonic inspection is being
Page 1152 and 1153:
Break Time mms://a588.l3944020587.c
Page 1156 and 1157:
Content: Section 6: Selected Applic
Page 1158 and 1159:
6.1: Defects & Discontinuities
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Flaw Orientation: Parallel / Perpen
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6.1.1 Casting Defects & Discontinui
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Casting Defects & Discontinuities-
Page 1166 and 1167:
Casting Defects & Discontinuities
Page 1168 and 1169:
Casting Defects & Discontinuities
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Page 1180 and 1181:
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Processing Defects & Discontinuitie
Page 1188 and 1189:
Page 1190 and 1191:
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Page 1194:
6.1.3 Welding Defects & Discontinui
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Welding Defects & Discontinuities
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Welding Defects & Discontinuities-
Page 1205 and 1206:
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Page 1209 and 1210:
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Page 1213 and 1214:
Page 1215 and 1216:
Service Induced Defects & Discontin
Page 1217 and 1218:
Figure 4-24 - In a carbon steel sam
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Figure 4-36 - Weld detail used to j
Page 1221 and 1222:
Figure 4-38 - Failure of DMW joinin
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Figure 4-58 - Cross-sectional view
Page 1225 and 1226:
Figure 5-2 - Hot Lean Amine Corrosi
Page 1227 and 1228:
Figure 5-46 - Overhead interstage k
Page 1229 and 1230:
Figure 5-48 - Metallographic sample
Page 1231 and 1232:
Longitudinal cracks- Detected by fl
Page 1233 and 1234:
Rail Inspection One of the major pr
Page 1235 and 1236:
Transverse Fissure
Page 1237 and 1238:
Transverse Fissure
Page 1239 and 1240:
Techniques: Wheel Probe
Page 1241 and 1242:
Techniques: (c) same with additiona
Page 1243 and 1244:
6.3.1: UT of Weldments (Welded Join
Page 1245 and 1246:
UT Calculator
Page 1247 and 1248:
The second step in the inspection i
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https://www.mandinasndt.com/index.p
Page 1251 and 1252:
Flaw Detection- Triangulations of r
Page 1254 and 1255:
6.3.2 Weld Scanning
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Typical Scanning Patterns: Typicall
Page 1258 and 1259:
Weld Scanning
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Weld Scanning
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Echo Dynamic- Position of Defects S
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Plate Weld Scanning
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Plate Weld Scanning
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Plate Weld Scanning
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Practice Makes Perfect 62. Which of
Page 1272 and 1273:
Pipe & Tube
Page 1274 and 1275:
Experts at work
Page 1276 and 1277:
Pipe Scanning
Page 1278 and 1279:
Pipe Scanning
Page 1280 and 1281:
Pipe Scanning- thickness/OD ratio
Page 1282 and 1283:
Pipe Scanning- Contact Methods
Page 1284 and 1285:
Pipe Scanning- Contact Methods
Page 1286 and 1287:
Answer part B c a b a/Sin A = b/Sin
Page 1288 and 1289:
Q35: Which of the following may res
Page 1290 and 1291:
Expert at works
Page 1292 and 1293:
Basic echodynamic pattern of reflec
Page 1294 and 1295:
C.1 Pattern 1 Point-like reflector
Page 1296 and 1297:
C.2 Pattern 2 Extended (elongated)
Page 1298 and 1299:
C.2 Pattern 2 Extended (elongated)
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C.3 Pattern 3a Extended (elongated)
Page 1302 and 1303:
C.3 Pattern 3a Extended (elongated)
Page 1304 and 1305:
C.3 Pattern 3b Oblique incidence, t
Page 1306 and 1307:
C.4 Pattern 4 Multiple reflector re
Page 1308 and 1309:
C.4 Pattern 4 Multiple reflector re
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Echodynamic- Differences between th
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Echo Dynamic of Discontinuity- Flaw
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Echo Dynamic of Discontinuity- Flaw
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Echo Dynamic of Discontinuity- Impr
Page 1318 and 1319:
Echo Dynamic of Discontinuity- Angl
Page 1320 and 1321:
Echo Dynamic of Discontinuity- Perf
Page 1322 and 1323:
Echo Dynamic of Discontinuity- Vert
Page 1324 and 1325:
Echo Dynamic of Discontinuity- Tand
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Echo Dynamic
Page 1328 and 1329:
Echo Dynamic
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Echo Dynamic
Page 1332 and 1333:
Echo Dynamic Crack
Page 1334 and 1335:
Echo Dynamic- Shaper indication and
Page 1336 and 1337:
Echo Dynamic Threadlike defects, po
Page 1338 and 1339:
Echo Dynamic In case “a” it wil
Page 1340 and 1341:
Echo Dynamic Typical Echo Dynamic P
Page 1342 and 1343:
Q. A smooth flat discontinuity whos
Page 1344 and 1345:
Q24. During inspection of a paralle
Page 1346 and 1347:
Q50: The reflection amplitude of a
Page 1348 and 1349:
Crack - Air filled Crack has greate
Page 1350 and 1351:
Inclusion Macro- Nonmetallic Inclus
Page 1352 and 1353:
6.6: Technique Sheets
Page 1354 and 1355:
Hanger Pin Testing using Shear Wave
Page 1356 and 1357:
Physical Dimension
Page 1358 and 1359:
Physical Dimension
Page 1360 and 1361:
Reporting: Scanning Report - Top of
Page 1362 and 1363:
Mock-Up
Page 1364 and 1365:
Mock-Up
Page 1366 and 1367:
Mock-Up
Page 1368 and 1369:
Hanger Pin Testing using Shear Wave
Page 1370 and 1371:
Pitch and Catch Methods- Set-up
Page 1372 and 1373:
6.7: Material Properties- Elastic M
Page 1374 and 1375:
6.7.2 The attenuation method The at
Page 1376 and 1377:
6.7.3 Velocity Measurements Velocit
Page 1378 and 1379:
Elastic Modulus Measurement - Young
Page 1380 and 1381:
These basic material properties, wh
Page 1382 and 1383:
Equipment: The velocity measurement
Page 1384 and 1385:
Testing Procedure: Equipment Used.
Page 1386 and 1387:
Velocity & Equations Poisson Ratio
Page 1388 and 1389:
6.8: High Temperature Ultrasonic Te
Page 1390 and 1391:
1.0 Background: Although most ultra
Page 1392 and 1393:
Temperature Limitation: Conventiona
Page 1394 and 1395:
Page 1396 and 1397:
Page 1398 and 1399:
敦煌大漠美食 - 50 度
Page 1400 and 1401:
2.0 Methods used for H.Temperature
Page 1402 and 1403:
For precision thickness gauging app
Page 1404 and 1405:
(1b) Flaw detection As in high temp
Page 1406 and 1407:
2.2 High Temperature Couplants Most
Page 1408 and 1409:
Keyword: Note that normal incidence
Page 1410 and 1411:
As a general rule, if the outer cas
Page 1412 and 1413:
2.4 Equipment Functions Freeze Func
Page 1414 and 1415:
Keyword: ■ ■ Velocity change of
Page 1416 and 1417:
3.3 Increased Attenuation: Sound at
Page 1418 and 1419:
3.4 Angular Variation in Wedges: Wi
Page 1420:
6.9: Dimension-Measurement Applicat
Page 1424 and 1425:
6.9.2 Thickness measurements are ma
Page 1426 and 1427:
6.9.3 Position measurements Positio
Page 1428 and 1429:
Fig. 60 Method of determining corre
Page 1430 and 1431:
Fig. 61 Setup for determining the p
Page 1432 and 1433:
6.10: In-Service Inspection
Page 1434 and 1435:
In-Service Inspection- Testing for
Page 1436 and 1437:
In-Service Inspection- (a) Crack te
Page 1438 and 1439:
In-Service Inspection- (a) Testing
Page 1440 and 1441:
6.11: Casting
Page 1442 and 1443:
Casting- Typical casting defects an
Page 1444 and 1445:
Casting- Detection of shrinkage cav
Page 1446 and 1447:
Inspection of Bonded Joints If the
Page 1448 and 1449:
Olympus Data on Bond Testing Our co
Page 1450 and 1451:
The BondMaster 1000e+ allows users
Page 1452 and 1453:
Bond Testing: OmniScan MX ECA/ECT B
Page 1454 and 1455:
OmniScan MX ECA/ECT: Eight Frequenc
Page 1456 and 1457:
Customers who already own an OmniSc
Page 1458 and 1459:
OmniScan MX ECA/ECT
Page 1460 and 1461:
Q41: The best type of frequency for
Page 1462 and 1463:
Corrosion Monitoring Ultrasonic ins
Page 1464 and 1465:
6.14: Crack Monitoring
Page 1466 and 1467:
Monitoring of fatigue cracks in par
Page 1468 and 1469:
For example, 150 mm (6 in.) diam, 8
Page 1470 and 1471:
Stress Measurements With ultrasonic
Page 1472 and 1473:
Family Day
Page 1474 and 1475:
6.App-1.1 TOFD Basic Theory TOFD is
Page 1476 and 1477:
6.App-1.2 Main Benefits of TOFD for
Page 1478 and 1479:
6.App-1.3 6.App-1.3.1 The Theory Mo
Page 1480 and 1481:
TOFD is generally recognised as the
Page 1482 and 1483:
TOFD Transmitter Receiver Crack Bac
Page 1484 and 1485:
6.App-1.2 Application Examples ■
Page 1486 and 1487:
Figure 5-3 - Preferential weld corr
Page 1488 and 1489:
Weld Root Corrosion and Erosion Pul
Page 1490 and 1491:
TOFD is deployed by scanning the we
Page 1492 and 1493:
Scan of weld with cursor positioned
Page 1494 and 1495:
Measurement of corroded area shows
Page 1496 and 1497:
6.App-1.3.4 TOFD Benefits for Corro
Page 1498 and 1499:
6.App-1.3.5 Overview on Scanning Di
Page 1500 and 1501:
■ Parallel TOFD scanning: Where t
Page 1502 and 1503:
Typical “Parallel” Weld Scannin
Page 1504 and 1505:
6.App-1.3.6 Further Reading- Introd
Page 1506 and 1507:
Page 1508 and 1509:
Page 1510 and 1511:
Sail Off
Page 1512 and 1513:
Content: Section 7: Reference Mater
Page 1514 and 1515:
7.2: General References & Resources
Page 1516:
Calibrating 70° Probe with IIW Blo
Page 1521 and 1522:
Content: Section 8: Ultrasonic Insp
Page 1523 and 1524:
Ultrasonic Inspection Quizzes
Page 1525 and 1526:
8.2: Online UT Quizzes
Page 1527 and 1528:
http://www.ndtcalc.com/index.php?pa
Page 1533:
Addendum-01a Equipment Calibrations
Page 1536 and 1537:
Attenuation due to Beam spread for:
Page 1538 and 1539:
Attenuation Due to Beam Spread: Sma
Page 1540 and 1541:
Material Attenuation Determination:
Page 1542 and 1543:
Δ dB = total Material attenuation
Page 1544 and 1545:
Construction of beam edges plot- No
Page 1546 and 1547:
20dB drop to find edges of beam
Page 1548 and 1549:
Construction of beam spread at 13mm
Page 1550 and 1551:
Construction of beam spread at 32mm
Page 1552 and 1553:
Perspex as Matching Layer/Wedge Tun
Page 1554 and 1555:
First/ Second Critical Angles V L1
Page 1556 and 1557:
Finding the probe index
Page 1558 and 1559:
Checking the probe Angle:
Page 1560 and 1561:
Calibration for range:
Page 1562 and 1563:
Angle Beam- Beam edges Proving (Ver
Page 1564 and 1565:
The IOW Block: The Institute of Wel
Page 1566 and 1567:
Angle Beam- Beam edges Proving (Hor
Page 1568 and 1569:
Page 1570 and 1571:
Page 1572 and 1573:
The DAC
Page 1574 and 1575:
DAC Curve
Page 1576 and 1577:
FLAT Bottom Holes FBH
Page 1578 and 1579:
Reading on: FLAT Bottom Holes FBH h
Page 1580 and 1581:
Transfer Corection
Page 1582 and 1583:
Transfer Correction: Reference surf
Page 1584 and 1585:
Transfer Correction:
Page 1586 and 1587:
Transfer Correction: Compression Pr
Page 1588 and 1589:
DGS- Distance Gain Size http://www.
Page 1590 and 1591:
DGS is a primarily mathematical tec
Page 1592 and 1593:
(Curve #2) represent the relative a
Page 1594 and 1595:
(Curve #2) represent the relative a
Page 1596 and 1597:
DGS- Different sizes of FBH at diff
Page 1598 and 1599:
What is DGS TCG is a time-corrected
Page 1600 and 1601:
Locating & Sizing Flaws
Page 1602 and 1603:
With ultrasonic instruments having
Page 1604 and 1605:
Scanning Patterns
Page 1606 and 1607:
Scanning Patterns
Page 1608 and 1609:
Scanning Patterns
Page 1610 and 1611:
Scanning Patterns
Page 1612 and 1613:
Scanning Patterns
Page 1614 and 1615:
Scanning Patterns
Page 1616 and 1617:
Scanning Patterns
Page 1622 and 1623:
Scanning Patterns http://www.olympu
Page 1624 and 1625:
Practice Makes Perfect 35. The 2 mm
Page 1626 and 1627:
Pulse-Echo Instrumentation
Page 1628 and 1629:
Pulse-Echo Instrumentation Transmit
Page 1630 and 1631:
Pulse-Echo Instrumentation Applied
Page 1632 and 1633:
Pulse-Echo Instrumentation Switch t
Page 1634 and 1635:
Pulse-Echo Instrumentation CLOCK GE
Page 1636 and 1637:
Pulse-Echo Instrumentation Sensitiv
Page 1638 and 1639:
Pulse-Echo Instrumentation Transduc
Page 1640 and 1641:
Pulse-Echo Instrumentation The Rece
Page 1642 and 1643:
Pulse-Echo Instrumentation Radio-Fr
Page 1644 and 1645:
Pulse-Echo Instrumentation The Imag
Page 1646 and 1647:
Pulse-Echo Instrumentation Excess G
Page 1648 and 1649:
Pulse-Echo Instrumentation Time Gai
Page 1650 and 1651:
Pulse-Echo Instrumentation KNEE MAX
Page 1652 and 1653:
Pulse-Echo Instrumentation KNEE Gai
Page 1654 and 1655:
Pulse-Echo Instrumentation Slide Po
Page 1656 and 1657:
Pulse-Echo Instrumentation Types of
Page 1658 and 1659:
Pulse-Echo Instrumentation Receiver
Page 1660 and 1661:
Pulse-Echo Instrumentation Large ra
Page 1662 and 1663:
Pulse-Echo Instrumentation Linear a
Page 1664 and 1665:
Pulse-Echo Instrumentation Gain A L
Page 1666 and 1667:
Pulse-Echo Instrumentation Pre-ampl
Page 1668 and 1669:
Pulse-Echo Instrumentation Saturati
Page 1670 and 1671:
Pulse-Echo Instrumentation DEMODULA
Page 1672 and 1673:
Pulse-Echo Instrumentation Half-Wav
Page 1674 and 1675:
Pulse-Echo Instrumentation DETECTIO
Page 1676 and 1677:
Pulse-Echo Instrumentation The vide
Page 1678 and 1679:
Pulse-Echo Instrumentation All Scan
Page 1680 and 1681:
Matrix Rows x, coordinates
Page 1682 and 1683:
Matrix Pixel
Page 1684:
Pulse-Echo Instrumentation In the S
Page 1688 and 1689:
X X X X X X X X X X X X
Page 1690 and 1691:
Raster Process 50 50 50 50 50 50 50
Page 1692 and 1693:
Pulse-Echo Instrumentation The numb
Page 1694 and 1695:
Pulse-Echo Instrumentation Bit 1 2
Page 1696 and 1697:
Pulse-Echo Instrumentation Operator
Page 1698 and 1699:
Pulse-Echo Instrumentation POST PRO
Page 1700 and 1701:
Pulse-Echo Instrumentation The DSC
Page 1702 and 1703:
Pulse-Echo Instrumentation Resoluti
Page 1704 and 1705:
Pulse-Echo Instrumentation 1. ROM 2
Page 1706 and 1707:
66. In Figure 3, transducer C is be
Page 1708 and 1709:
69. In Figure 4, transducer B is be
Page 1710 and 1711:
Q: The output voltage from a satura
Page 1712:
Addendum-02 Equations & Calculation
Page 1717 and 1718:
Contents: 1. Material Acoustic Prop
Page 1720 and 1721:
2.0 Ultrasonic Formula http://www.n
Page 1722 and 1723:
Ultrasonic Formula α = Transducer
Page 1724 and 1725:
4.0 The Speed of Sound Hooke's Law,
Page 1726 and 1727:
V is the speed of sound Eleatic con
Page 1728 and 1729:
E/N/G
Page 1730 and 1731:
Spreading/ Scattering/ adsorption (
Page 1732 and 1733:
Amplitude at distance Z Where v is
Page 1734 and 1735:
Which U t ? U 0 t , A 0 o U 1 t , A
Page 1736 and 1737:
The following applet can be used to
Page 1738 and 1739:
Reflection and Transmission Coeffic
Page 1740 and 1741:
If reflection and transmission at i
Page 1742 and 1743:
Q1: What is the percentage of initi
Page 1744 and 1745:
8.0 Snell’s Law Snell's Law holds
Page 1746 and 1747:
Practice Makes Perfect 5. For an ul
Page 1748 and 1749:
Practice Makes Perfect 9. Calculate
Page 1750 and 1751:
9.0 S/N Ratio The following formula
Page 1752 and 1753:
Sound Volume: Area x pulse length
Page 1754:
where α is the radius of the trans
Page 1758 and 1759:
Example: Calculate the modified Nea
Page 1760 and 1761:
11.0 Focusing & Focal Length http:/
Page 1762 and 1763:
12.0 Offset of Normal probe above c
Page 1764 and 1765:
13.0 “Q” Factor 3dB down
Page 1766:
Inverse Square Law http://www.cyber
Page 1769 and 1770:
DGS Distance Gain Sizing Y-axis sho
Page 1771 and 1772:
The blue curves plotted show how th
Page 1773 and 1774:
20-4dB=16dB (deduced) Δ Flaw =30-1
Page 1775 and 1776:
http://www.olympus-ims.com/en/atlas
Page 1777:
DGS is a primarily mathematical tec
Page 1780 and 1781:
Figure1:
Page 1782 and 1783:
15.0 Pulse Repetitive Frequency/Rat
Page 1784 and 1785:
Q4-12 Answer: First calculate the p
Page 1790 and 1791:
Addendum-03 Questions & Answers I C
Page 1792 and 1793:
Make mistakes now, not during exam!
Page 1794 and 1795:
30. On an A-scan display the dead z
Page 1796 and 1797:
31. As the acoustic impedance ratio
Page 1798 and 1799:
15. Which type of test block is use
Page 1800 and 1801:
Mistake Made ----------------------
Page 1802 and 1803:
Question: Which type of screen pres
Page 1805 and 1806:
Table 1.2
Page 1807 and 1808:
Q1-13 The second critical angle at
Page 1809 and 1810:
For evaluating material properties
Page 1811 and 1812:
Q1-22 The beam spread half angle I
Page 1813 and 1814:
Q2-12 An angle beam produce a 45°
Page 1815 and 1816:
Q2-17 A change in echo amplitude fr
Page 1817 and 1818:
Q2-19 What is the rate of attenuati
Page 1819 and 1820:
Q2-11 A change in 16dB on the atten
Page 1821 and 1822:
Q3-7 The half angle beam spread of
Page 1823 and 1824:
Monkey made mistake too!
Page 1825 and 1826:
Smart Himba Girl do not made mistak
Page 1827 and 1828:
Smart Himba Girl do not made mistak
Page 1829 and 1830:
Q3-8 Answer: The next SDH used will
Page 1831 and 1832:
Q3-13 During examination, an indica
Page 1833 and 1834:
Q3-15 In contact testing, the back
Page 1835 and 1836:
Q4-13 Answer: PRR = number of pulse
Page 1837 and 1838:
Q4-16
Page 1839 and 1840:
Q4-17 Illustrations Complete loop=4
Page 1841 and 1842:
8. When testing a 30 mm diameter, 5
Page 1843 and 1844:
Q5-20 Answer: None of above
Page 1845:
Q5-22 Table B-1
Page 1848 and 1849:
38. The angle of a refracted shear
Page 1850 and 1851:
48. A more highly damped transducer
Page 1852 and 1853:
47. When a vertical indication has
Page 1854 and 1855:
63. The purpose of the couplant is
Page 1856:
Immersion Testing Method
Page 1861 and 1862:
Standards Answer: B
Page 1863 and 1864:
Standards Answer: A (or C?)
Page 1865 and 1866:
Standards Answer: C
Page 1867 and 1868:
Standards Answer: C
Page 1869:
Standards Answer: A?
Page 1872 and 1873:
Arrows shown standard correct answe
Page 1874 and 1875:
Page 1876:
Page 1879 and 1880:
Page 1881 and 1882:
Page 1883 and 1884:
Take a break mms://a588.l3944020587
Page 1885 and 1886:
Page 1887 and 1888:
Practices Make Perfect
Page 1889 and 1890:
Click to Q&A http://www.ndtcalc.com
Page 1891 and 1892:
Ultrasonic Formula
Page 1893:
Page 1896 and 1897:
Echo Amplitude- Reflector Size “D
Page 1898 and 1899:
Scanning Speed: Scanner speed = (PR
Page 1900 and 1901:
Expert at Works
Page 1902 and 1903:
Content: Exercise 1 Exercise 2 Expe
Page 1904 and 1905:
Practices Make Perfect
Page 1906 and 1907:
Click to Q&A http://www.ndtcalc.com
Page 1908 and 1909:
2.0: Ultrasound Formula http://www.
Page 1910 and 1911:
Ultrasonic Formula
Page 1912:
Page 1915 and 1916:
Echo Amplitude- Reflector Size “D
Page 1917 and 1918:
Scanning Speed: Scanner speed = (PR
Page 1919 and 1920:
Offshore Lifts
Page 1921 and 1922:
Top Scorer
Page 1923 and 1924:
Exercises Studyblue-01
Page 1925 and 1926:
3. The only significant sound wave
Page 1927 and 1928:
7. The simple experiment where a st
Page 1929 and 1930:
11. The differences in signals rece
Page 1931 and 1932:
15. Which of the following may resu
Page 1933 and 1934:
19. When examining materials for pl
Page 1935 and 1936:
21. Rayleigh waves are influenced m
Page 1937 and 1938:
25. Which of the following scanning
Page 1939 and 1940:
29. At an interface between two dif
Page 1941 and 1942:
33. In the immersion technique, the
Page 1943 and 1944:
37. On an A-scan display, what repr
Page 1945 and 1946:
41. A 152 mm (6 in) diameter rod is
Page 1947 and 1948:
Immersion Testing Bridge Manipulato
Page 1949 and 1950:
45. Which best describes a typical
Page 1951 and 1952:
49. During a straight beam ultrason
Page 1953 and 1954:
53. A smooth flat discontinuity who
Page 1955 and 1956:
57. The angle at which 90 degrees r
Page 1957 and 1958:
61. Large gains in a metallic test
Page 1959 and 1960:
65. In Figure 3, transducer A is be
Page 1961 and 1962:
69. In Figure 4, transducer B is be
Page 1963 and 1964:
72. If you were requested to design
Page 1965 and 1966:
76. The electronic circuitry that a
Page 1967 and 1968:
80. The angle formed by an ultrason
Page 1969 and 1970:
83. A grouping of a number of cryst
Page 1971 and 1972:
85. The angular position of the ref
Page 1973 and 1974:
89. The change in direction of an u
Page 1975 and 1976:
93. In general, shear waves are mor
Page 1977 and 1978:
97. The speed with which ultrasonic
Page 1979 and 1980:
Barbecue Lamb
Page 1981 and 1982:
103. If ultrasonic wave is transmit
Page 1983 and 1984:
107. When inspecting a rolled or fo
Page 1985 and 1986:
111. During immersion testing of an
Page 1987 and 1988:
115. One of the most common applica
Page 1989 and 1990:
119. At a water-steel interface the
Page 1991 and 1992:
123. In a basic pulse echo ultrason
Page 1993 and 1994:
127. The instrument displays a plan
Page 1995 and 1996:
131. The motion of particles in a s
Page 1997 and 1998:
135. As frequency increases in ultr
Page 1999 and 2000:
139. The velocity of longitudinal w
Page 2001 and 2002:
143. A diagram in which the entire
Page 2003 and 2004:
147. The expansion and contraction
Page 2005 and 2006:
151. A quartz crystal cut so that i
Page 2007 and 2008:
153. When an ultrasonic beam reache
Page 2009 and 2010:
157. The most common used method of
Page 2011 and 2012:
161. Acoustic velocities of materia
Page 2013 and 2014:
165. The resolving power of a trans
Page 2015 and 2016:
169. Because the velocity of sound
Page 2017 and 2018:
173. In an A-scan presentation, the
Page 2019 and 2020:
Fiesta
Page 2021 and 2022:
Choices
Page 2023 and 2024:
179. Low frequency sound waves are
Page 2025 and 2026:
Frequency = 5 MHZ, Wavelength λ =
Page 2027 and 2028:
181. In immersion testing, the acce
Page 2029 and 2030:
183. In immersion testing, irreleva
Page 2031 and 2032:
187. The property of certain materi
Page 2033 and 2034:
191. The lack of parallelism betwee
Page 2035 and 2036:
195. Reducing the extent of the dea
Page 2037 and 2038:
199. Attenuation is the loss of the
Page 2039 and 2040:
203. The most commonly used method
Page 2041 and 2042:
Chicken & Squid Satay Treats
Page 2043 and 2044:
1. The wave mode that has multiple
Page 2045:
Addendum-04C Questions & Answers- I
Page 2048 and 2049:
Production Island
Page 2050 and 2051:
At works
Page 2053 and 2054:
Assorted Exercises
Page 2055 and 2056:
Q23. Propagation of ultrasonic wave
Page 2057 and 2058:
Q30. The sum of reflection & transm
Page 2059 and 2060:
Practice 2: Source: Lavender Intern
Page 2061 and 2062:
Q3. On a scan display the dead zone
Page 2063 and 2064:
Q7. In which zone does the amplitud
Page 2065 and 2066:
Q11. Of an A-scan display what repr
Page 2067 and 2068:
Q15. The ratio of the velocity of s
Page 2069 and 2070:
19. The total energy losses occurri
Page 2071 and 2072:
Other Sources
Page 2073:
Q47: A major (!) limitation of usin
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Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing, UT

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