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WorksheetsUT-CW-03
Total questions: 11
Worksheet time: 7mins
In which area of the ultrasonic beam do the edges of the wave diverge?
The Fraunhoffer zone
In the dead zone
What are “K” factors?
Constants used in calculating beam spread
Constants used in the near zone formula
Variables used in calculating beam spread
What effect on beam spread does a change of probe, to one with the same diameter but a lower frequency, have?
The half angle increases
The half angle decreases
What effect on beam spread does a change of probe, to one with the same frequency but a larger diameter, have?
The half angle increases
The half angle decreases
What is PRF?
Probe rate frequency
Pulse rate frequency
Pulse repetition frequency
What are boundary waves?
(a)
What is an alternative term used to describe longitudinal waves?
Compression waves
Shear waves
Surface waves
What is acoustic impedance a product of?
Material density and the velocity of sound through it
Sound velocity through a material and its elasticity
Material elasticity and specific gravity
What happens if an excessive PRF is set on the flaw detector?
The Piezo Electric effect is lost
Ghost echoes appear on the CRT
Grass appears on the CRT
What is the clock interval?
The time between pulses of energy leaving the probe
The time between a pulse of energy returning to probe and the signal appearing on the CRT
The time taken, for a pulse of energy, from leaving the probe to travel through a material and return
What is an alternative term used to describe Rayleigh waves?
(a)
