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

Arrows shown standard correct answers:
3-Screen Height Linearity
The ultrasonic testing instrument shall provide linear vertical presentation
within ±5% (According to ASME Sec.V, Article 5 T-532) of the full screen
height for 20% to 80% of the calibrated screen height.
The procedure for evaluating screen height linearity is provided in appendix 1
of article 5, ASME code Sec.V and shall be performed at the beginning of
each period of extended use (or every 3 months, which ever is less).
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