Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. Ultrasonic testing is:
a. Mechanical energy with a speed of propagation faster than the speed of sound
b. Sound which has a frequency or pitch above the range of the human ear
c. The science of discontinuity detection using ultrasonic sound
d. Mechanical vibrations below the frequency of human hearing
Q. Which technique would most likely be used to examine a weld, with the weld cap stillin place?
a. Through transmission testing
b. Angle beam testing
c. Straight beam testing
d. None of the above
Q. Higher frequency transducers are normally used:
a. In contact testing applications
b. In angle beam testing applications
c. In immersion testing applications
d. Where deeper penetration is required
Q. Typical ultrasonic testing frequencies are:
a. 50 kHz to 1 MHz
b. 200 kHz to 25 MHz
c. 10 MHz to 100 MHz
d. 1 MHz to 5 MHz
Q. A disadvantage of using a high frequency ultrasonic transducer is:
a. It provides a smaller beam angle and better resolving power
b. It provides a larger beam angle and poorer resolving power
c. It is scattered more by coarse grained material
d. It is scattered less by coarse grained material
Q. Which of the following circuits provides timing signals to the pulser?
a. The clock
b. The amplifier
c. The pulse generator
d. The sweep generator
Q. Which of the following search units would contain the thinnest quartz crystal?
a. A 1 MHz search unit
b. A 5 MHz search unit
c. A 15 MHz search unit
d. A 25 MHz search unit
Q. With longitudinal wave incident at angles between the first and second critical angles:
a. The sound beam is totally reflected
b. Only shear waves are produced in the second material
c. Shear waves and longitudinal waves are produced in the second material
d. Only longitudinal waves are produced in the second material
Q. Sound velocity is described by which of the following relationships?
a. Wavelength times frequency
b. Wavelength divided by frequency
c. Wavelength divided acoustic impedance
d. Acoustic impedance divided by density
Q. The relationship between the longitudinal wave incident angle and the refracted shearwave angle is defined by:
a. Snell's law
b. Snell's constant
c. The law of acoustics
d. Fraunhofer’s law
Q. Acoustic impedance is defined by which of the following relations?
a. Material density/wavelength
b. Material density × velocity
c. Velocity/wavelength
d. Velocity × wavelength
Q. The upper limit of human hearing is normally considered to be about:
a. 12 kHz
b. 16 kHz
c. 20 kHz
d. 30 kHz
Q. Reference standards containing a series of flat bottom holes of the same diameter atdifferent depths in each block are called?
a. Area-amplitude blocks
b. Distance-amplitude blocks
c. IIW blocks
d. Sizing blocks