Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. Which of the following is true?
a. Velocity = frequency/wavelength
b. Frequency = velocity × wavelength
c. Velocity = wavelength/frequency
d. Wavelength=velocity/frequency
Q. Most commercial ultrasonic testing is accomplished using frequencies between:
a. 1 and 25 kHz
b. 0.2 and 25 MHz
c. 1 and 1 000 kHz
d. 15 and 100 MHz
Q. The longitudinal wave incident angle which results in formation of a rayleigh wave iscalled:
a. Normal incidence
b. The first critical angle
c. The second critical angle
d. Any angle above the first critical angle
Q. An ultrasonic testing technique in which the transducer element is not parallel to thetest surface is called:
a. Angle beam testing
b. Immersion testing
c. Contact testing
d. Through-transmission testing
Q. In the same material, shear wave velocity is:
a. Approximately 1/2 longitudinal wave velocity
b. Approximately twice longitudinal wave velocity
c. Approximately 1/4 longitudinal wave velocity
d. Approximately four times longitudinal wave velocity
Q. Another name for a compression wave is a:
a. Lamb wave
b. Shear wave
c. Longitudinal wave
d. Transverse wave
Q. Under most circumstances, which of the following frequencies would result in thebest resolving power?
a. 1 MHz
b. 5 MHz
c. 10 MHz
d. 25 MHz
Q. The most useful range of incident longitudinal wave angles for ultrasonic testing is:
a. Normal incidence to the first critical angle
b. First critical angle to the second critical angle
c. Second critical angle to the third critical angle
d. Above the third critical angle
Q. Ultrasonic testing of material where the search unit is in direct contact with thematerial being tested may be:
a. Straight beam testing
b. Surface wave testing
c. Angle beam testing
d. All of the above
Q. The echo on the cathode ray tube (CRT) which represents the far boundary of thematerial being tested is called:
a. Hash
b. The initial pulse
c. The ‘main bang’
d. The back wall echo
Q. AA standard block which can be used to calibrate an instrument for an angle beamrange calibration is:
a. Area-amplitude blocks
b. Distance-amplitude blocks
c. V1/A2 block
d. Beam spread block
Q. The ability to detect echos from small reflectors is called:
a. Resolution
b. Attenuation
c. Accuracy
d. Sensitivity
Q. When the motion of the particles of a medium is parallel to the direction ofpropagation, the wave being transmitted is called a:
a. Longitudinal wave
b. Shear wave
c. Surface wave
d. Lamb wave
Q. In contact testing, the entry surface indication is sometimes referred to as:
a. The initial pulse
b. The ‘main bang’ or transmitter pulse
c. Both (a) and (b)
d. None of the above
Q. A A second name for Rayleigh waves is:
a. Shear waves
b. Longitudinal waves
c. Transverse waves
d. Surface waves