Top 1000+ Solved Non Destructive Testing and Evaluation MCQ Questions Answer
Q. An effective method of testing for air bubbles in a pipe is to:
a. Measure pipe back wall echo amplitude
b. Analyze the frequency spectrum of pipe back wall echo
c. Transmit sound across pipe diameter and look for echo loss
d. Transmit sound across pipe diameter and look for echoes from air bubbles
Q. The ultrasonic test method in which finger damping is most effective in locating adiscontinuity is:
a. Shear wave
b. Longitudinal wave
c. Surface wave
d. Compression wave
Q. Inspection of castings is often impractical because of:
a. Extremely small grain structure
b. Coarse grain structure
c. Uniform flow lines
d. Uniform velocity of sound
Q. One of the most common applications of ultrasonic tests employing shear waves isthe:
a. Detection of discontinuities in welds, tube and pipe
b. Determination of elastic properties of metallic products
c. Detection of laminar discontinuities in heavy plate
d. Measurement of thickness of thin plate
Q. The 2 mm wide notch in the IIW block is used to:
a. Determine beam index point
b. Check resolution
c. Calibrate angle beam distance
d. Check beam angle
Q. A primary purpose of a reference standard is:
a. To provide a guide for adjusting instrument controls to reveal discontinuities that are considered harmful to the end use of the product
b. To give the technician a tool for determining exact discontinuity size
c. To provide assurance that all discontinuities smaller than a certain specified reference reflector are capable of being detected by the test
d. To provide a standard reflector which exactly simulates natural discontinuities of a critical size
Q. Laminations would most likely be encountered in which of the following productforms?
a. Forgings
b. Hot rolled plate
c. Castings
d. Welds
Q. A 50 percent decrease in echo amplitude is equal to a loss of how many decibels?
a. 2
b. 6
c. 10
d. 14
Q. Typical frequencies which might be used to perform ultrasonic testing of concreteare:
a. 25 to 100 kHz
b. 200 kHz to 5 MHz
c. 1 MHz to 5 MHz
d. 2.25 MHz to 10 MHz
Q. Compared to the echo returned from a smooth reflector, the echo returned from anatural flaw of the same area and orientation is:
a. The same
b. Greater
c. Smaller
d. Not related to
Q. Which of the following is least likely to be a source of false indications?
a. Discontinuities oriented at an angle to the entry surface
b. Contoured surfaces
c. Edge effects
d. Surface condition
Q. Abnormally large grain size in the test material may be indicated by:
a. High levels of baseline noise, or hash
b. High amplitude reflections between front and back surface echoes
c. High amplitude, spurious echoes which are not repeatable
d. Abnormally high back surface echo
Q. The coated inside surface of the large end of a cathode ray tube which becomesluminous when struck by an electron beam is called:
a. An electron gun
b. An electron amplifier
c. A CRT screen
d. An electron counter
Q. In a basic pulse-echo ultrasonic instrument, the component that produces the timebase line is called a:
a. Sweep circuit
b. Receiver
c. Pulser
d. Synchroniser
Q. Gas discontinuities are reduced to flat discs or other shapes parallel to the surface by:
a. Rolling
b. Machining
c. Casting
d. Welding