Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. The 100 mm radius in an IIW block is used to:
a. Calibrate sensitivity level
b. Check resolution
c. Calibrate angle beam distance
d. Check beam angle
Q. Which of the following is a disadvantage of immersion test units?
a. Inspection speed
b. Ease of controlling sound beam direction
c. Portability
d. Application to automatic scanning techniques
Q. Acoustic energy propagates in different modes. Which of the following represent amode?
a. Longitudinal wave
b. Shear wave
c. Surface wave
d. All of the above
Q. Which of the following would be considered application(s) of ultrasonic testing?
a. Determination of a material’s elastic modulus
b. Study of a material’s metallurgical structure
c. Measurement of a material’s thickness
d. All of the above
Q. Waves whose particle displacement is parallel to the direction of propagation arecalled:
a. Longitudinal waves
b. Shear waves
c. Lamb waves
d. Rayleigh waves
Q. The only sound waves which travel in liquids are:
a. Longitudinal waves
b. Shear waves
c. Rayleigh waves
d. Plate waves
Q. In steel, the velocity of sound is greatest in which of the following modes ofvibration?
a. Longitudinal
b. Shear
c. Surface wave
d. Sound velocity is identical in all modes, in a given material
Q. The scattering of the rays of an ultrasonic beam due to reflection from a highlyirregular surface is called:
a. Angulation
b. Dispersion
c. Refraction
d. Diffraction
Q. Acoustic impedance is a material's:
a. (Density)/(velocity)
b. (Density) × (velocity)
c. Refractive index
d. (Density)/(refractive index)
Q. When a sound beam is incident on an acoustic interface at some angle other than normalincidence, which of the following occurs?
a. Reflection
b. Refraction
c. Mode conversion
d. All of the above
Q. The angle formed by an ultrasonic wave as it enters a medium of different velocity thanthe one from which it came and a line drawn perpendicular to the interface between the two media is called:
a. The angle of incidence
b. The angle of refraction
c. The angle of diffraction
d. The angle of reflection
Q. Which of the following frequencies would probably result in the greatest ultrasonicattenuation losses?
a. 1 MHz
b. 2.25 MHz
c. 10 MHz
d. 25 MHz
Q. Attenuation is made up of:
a. Diffusion and absorption
b. Scatter and reflection
c. Absorption and scatter
d. Reflection at grain boundaries
Q. The most important factor required for the proper interpretation of ultrasonic testresults is:
a. The ultrasonic signal amplitude
b. A knowledge of the test specimen material and its construction
c. A knowledge of the ultrasonic instruments operating characteristics
d. The ultrasonic signal location
Q. A significant limitation of a lower frequency, single element transducer is:
a. Scatter of sound beam due to microstructure of test object
b. Increased grain noise or ‘hash’
c. Less beam spread
d. Impaired ability to display discontinuities just below the entry surface