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WorksheetsUT-CW-04
Total questions: 13
Worksheet time: 7mins
What is the purpose of a couplant?
To enable sound energy to pass from the probe to the test piece
To protect the test piece
all of above
Which of the following materials would have the highest attenuation?
A fine grained material
A coarse grained material
all of above
What effect does beam spread have on sound attenuation?
More beam spread, more attenuation
Less beam spread, less attenuation
Less beam spread, more attenuation
The piezo electric effect can perform which one of the following?
Convert sound to mechanical energy
Convert electrical energy into signals
Convert electrical energy into mechanical energy
Which piezo electric crystal is the best transmitter of ultrasound?
Barium titanate
Quartz
Lithium sulphate
Which piezo electric crystal is the best receiver of ultrasound?
Quartz
Lithium sulphate
What is the law of reflection?
The angle of refraction = the angle of reflection
The angle of incidence = the angle of reflection
The angle of incidence = the angle of refraction
What is Snell’s law?
sin α = V1
sin β V2
The angle of incidence = the angle of reflection
A change in wave form, together with a change in sound velocity, due to reflection or refraction is called....
A mode change
Pulse repetition frequency
An unwanted signal on the flaw detector screen is called....
A spurious indication
a mode change
Diffraction
A series of high and low intensity waves radiating out from the tips of a narrow reflector as sound passes it is called....
Diffraction
A mode change
A change in beam angle or direction in the vertical plane at an interface, due to differences in material velocity, is called....
Refraction
diffraction
What unit is used to quantify differences in sound intensities?
dB
Hz
mm
