Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. When a sound beam is reflected:
a. The angle of reflection is found using Snell's law
b. The angle of reflection equals the angle of incidence
c. All the sound energy is reflected unless the acoustic impedance is zero
d. Beam spread is decreased
Q. Which of the following circuits converts electrical energy to ultrasonic energy?
a. The pulse generator
b. The transducer
c. The transformer
d. The power supply
Q. An instrument display in which the horizontal base line represents elapsed time andthe vertical deflection represents signal amplitudes is called:
a. A scan
b. B scan
c. C scan
d. A time line display
Q. Which of the following circuits provides short duration, high energy pulses which areused to excite the transducer?
a. The pulse generator
b. The amplifier
c. The transducer
d. The clock
Q. A cross section view of a test piece is produced by which of the following?
a. A scan
b. B scan
c. C scan
d. A time line display
Q. Echo amplitude losses may be caused by:
a. Entry surface roughness
b. Coarse grain size
c. Discontinuity orientation
d. All of the above
Q. Which of the following is an advantage of using a focused transducer?
a. The useful range of the transducer is decreased
b. The useful range of the transducer is increased
c. Sensitivity to the effects of a rough surface is increased
d. Greater sensitivity is achieved in the transducer's useable range
Q. Which of the following circuits provide current to operate the ultrasonic instrument?
a. The pulse generator
b. The amplifier
c. The power supply
d. The sweep generator
Q. Which of the following is a true statement?
a. Higher frequencies produce lower sensitivity
b. Higher frequencies produce longer wavelengths
c. Thicker crystals produce lower frequency transducers
d. Longer wavelengths produce higher sensitivity
Q. Which type(s) of sound wave modes will propagate through solids?
a. Longitudinal
b. Shear
c. Surface
d. All of the above
Q. The longitudinal wave incident angle at which the refracted shear wave angle equalsninety degrees is called:
a. The Snell angle
b. The Snell constant
c. The first critical angle
d. The second critical angle
Q. The amount of beam divergence from a crystal is primarily dependent onthe:
a. Type of test
b. Tightness of crystal backing in the search unit
c. Frequency and crystal size
d. Pulse length
Q. In ultrasonic testing, a liquid coupling medium between the crystal surface and the part surface is necessary because :
a. Lubricant is required to minimize wear on the crystal surface
b. An air interface between the crystal surface and the part surface would almost completely reflect the ultrasonic vibrations
c. The crystal will not vibrate if placed directly in contact with the surface of the part being inspected
d. The liquid is necessary to complete the electrical circuit in the search unit
Q. Lower 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