Top 1000+ Solved Material Science MCQ Questions Answer
Q. Which of the following method is used for finding the internal defects of material?
a. ultrasonic testing
b. dye penetrant test
c. magnetic particle test
d. eddy currenttest
Q. Which factor of ultrasonic waves is measuredin Ultrasonic Testing?
a. wavelength
b. speed of waves
c. time of travel
d. distance traveled
Q. Which of the following method uses twotransducers?
a. pulse echo
b. through transmission
c. eddy currenttest
d. magnetic particle test
Q. Time of travel of waves from the defect is……for Pulse Echo method
a. more
b. less
c. 1/4 of the total time
d. 1/3 of the toal time
Q. Internal Discontinuities in the shaft for elctricmotor can be checked by
a. ultrasonic testing
b. dye penetrant test
c. magnetic particle test
d. eddy currenttest
Q. Select odd options :- Couplant is used inUltrasonic Testing to
a. remove airgap
b. clean the surface
c. for better contact
d. for lubrication purpose
Q. select odd options :- Magnetic partical test isnot suitable for
a. gray cast iron
b. chilled castiron
c. aluminium
d. steel
Q. select odd options :- Magnetic partical test isnot suitable for
a. welding
b. powder metallurgy
c. casting
d. forging
Q. ferromagnetic powder suspended on surface with carrier such as
a. water
b. alcohol
c. keroscene
d. none of theabove
Q. In MPT, when the part is magnetised , transverse cracks are easily detected
a. lengthwise
b. circular
c. parallel tocrack
d. none of theabove
Q. To find out the transverse crack, magnetic field has to apply, in MPT
a. lengthwise
b. circular
c. parallel tocrack
d. none of theabove
Q. In MPT, skin effect comes into picture due to current
a. ac
b. dc
c. both a & b
d. none of theabove
Q. current magnetization makes it possible to detect surface as well as subsurface discontinuities.
a. ac
b. dc
c. both a & b
d. none of theabove
Q. In MPT, detection of subsurfae depends on
a. the strength of ac magnetic field
b. width of discontinuity
c. the strength of ac voltage
d. none of theabove
Q. Detection of subsurfae depends on , in MPT
a. the strength of magnetic field
b. the strength of ac magnetic field
c. both a & b
d. none of theabove