Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. During immersion testing of pipe or tubing the incident longitudinal wave angle mustbe limited to a narrow range. The reason for the upper limit is:
a. To avoid complete reflection of ultrasound from the test piece
b. To prevent formation of Rayleigh waves
c. To prevent formation of shear waves
d. To avoid saturating the test piece with ultrasound
Q. A calibration for immersion ultrasonic testing of pipe or tubing should establish atransducer position such as:
a. I.D. and O.D. notches produce equal responses for equivalent metal path distances
b. Rayleigh waves are generated through the entire pipe or tubing wall
c. All ultrasound enters the test piece
d. Only longitudinal waves are generated in the test piece
Q. During immersion ultrasonic testing of pipe or tubing, spurious echoes may be causedby:
a. Dirt on the test piece
b. Grease on the test piece
c. Air bubbles on the test piece
d. All of the above
Q. Typical frequencies which might be used to perform ultrasonic testing of concreteare:
a. 25 to 100 kHz
b. 200 to 5 MHz
c. 1 MHz to 5 MHz
d. 2.25 MHz to 10 MHz
Q. Typical frequencies which might be used to perform ultrasonic testing of ferrous andnon-ferrous welds are:
a. 25 to 100 kHz
b. 200 to 5 MHz
c. 1 MHz to 5 MHz
d. 2.25 MHz to 10 MHz
Q. Which of the following materials would probably require testing at the lowestfrequency?
a. Small grained mild steel
b. Mild steel castings
c. Mild steel forgings
d. Cast iron
Q. Which of the following is an advantage of contact testing over immersion?
a. Ability to maintain uniform coupling on rough surface
b. Longer dead time near the front surface of the test piece
c. Ease of field use
d. Ability to continuously vary incident wave angle during test
Q. Which of the following is a disadvantage of contact testing?
a. Ability to maintain uniform coupling on rough surface
b. Ease of field use
c. Greater penetrating power than immersion testing
d. Less penetrating power than immersion testing
Q. A typical application for a through transmission technique is:
a. Flaw depth sizing
b. Flaw depth location
c. Thickness gauging
d. Bond/unbond testing
Q. An ultrasonic technique in which two transducers are used, in a constant positionrelative to each other, is:
a. Through transmission
b. Contact testing
c. Pulse echo
d. Continuous wave
Q. Which of the following cast materials could most likely be successfully ultrasonicallytested?
a. Low carbon steel
b. Stainless steel
c. Iron
d. Pure lead
Q. Which of the following product forms would probably be tested at the lowestfrequency?
a. Forgings
b. Hot rolled plate
c. Castings
d. Extrusions
Q. Addition of approximately 6% antimony as an alloying element could be expected toincrease the ultrasonic inspectability of which of the following materials?
a. Low carbon steel
b. Stainless steel
c. Iron
d. Pure lead
Q. Strong signals which travel across the horizontal time base of an A scan presentationwhile the transducer is motionless on the test piece are probably:
a. Randomly oriented flaws
b. Electrical interference
c. Grain noise
d. Loose wedge on transducer
Q. Excessive ringing of the transducer could be caused by:
a. Electrical interference
b. Loose crystal
c. Test piece with large grain size
d. Test piece with small grain size