In an A scan presentation, the amplitude of vertical indications on th – McqOptions

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1.	In an A scan presentation, the amplitude of vertical indications on the screen represents the:
A.	Amount of ultrasonic sound energy returning to the search unit
B.	Distance travelled by the search unit
C.	Thickness of material being tested
D.	Elapsed time since the ultrasonic pulse was generated
Answer» B. Distance travelled by the search unit

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