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

173. In an A-scan presentation, the horizontal line formed by the uniform and
repeated movement of an electron beam across the fluorescent screen of a
cathode ray tube is called:
A. A square wave pattern
B. A sweep line
C. A marker pattern
D. None of the above
174.The greatest amount of attenuation losses take place at:
A. 1 MHz
B. 2.25 MHz
C. 5 MHz
D. 10 MHz