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This set of Material Science Multiple Choice Questions & Answers (MCQs) focuses on Material Science Set 30
Q1 | In MPT, when the part is magnetised , transverse cracks are easily detected
- lengthwise
- circular
- parallel tocrack
- none of theabove
Q2 | To find out the transverse crack, magnetic field has to apply, in MPT
- lengthwise
- circular
- parallel tocrack
- none of theabove
Q3 | In MPT, skin effect comes into picture due to current
- ac
- dc
- both a & b
- none of theabove
Q4 | current magnetization makes it possible to detect surface as well as subsurface discontinuities.
- ac
- dc
- both a & b
- none of theabove
Q5 | In MPT, detection of subsurfae depends on
- the strength of ac magnetic field
- width of discontinuity
- the strength of ac voltage
- none of theabove
Q6 | Detection of subsurfae depends on , in MPT
- the strength of magnetic field
- the strength of ac magnetic field
- both a & b
- none of theabove
Q7 | In magnaglo, the wavelength of ultravioletlight is
- 2500 to 3000a°
- 3500 to 4000a°
- 4500 to 5000a°
- none of theabove
Q8 | ...........does not damage the workpiece.
- creep and fatigue
- brinell and rockwell
- tensile and erichson test
- none
Q9 | ...........test does not damage the workpiecewhile testing
- magnaflu
- hardness
- bend
- torsion
Q10 | The defects like mould shifts,surface roughness,blow holes etc can be easily detected by ......... method.
- radiography
- visual inspection
- eddy current
- ultrasonic
Q11 | ...........is commonly used for visual inspectionmethod
- boroscope
- optical microscope
- endoscope
- telescope
Q12 | ........is used to inspect the inside portion of a hollow chamber,narrow tube or a bore
- boroscope
- optical microscope
- endosope
- telescope
Q13 | Oil couplant used in the ultrasonic test to
- make surfacesmooth
- avoid air gap
- reduce friction
- fill the surface flaws
Q14 | Which type of the test is mostly used for the inspection of the grinding and fatigue cracks on tool steeel?
- magnaflux
- ultrasonic
- radiography
- eddy current
Q15 | Dimension and accuracy in the products maybe checked by
- dye penetrant
- magnaflux
- radiography
- eddy current
Q16 | Level of liquid in the sealed container may bechecked by
- magnaflux
- dye penetrant
- radiography
- eddy current
Q17 | Internal defects inthe steel componentcannot be detected by
- magnaflux
- radiography
- ultrasonic
- none
Q18 | Which one may be used as material for transducer in ultrasonic test?
- steel
- quartz
- polymer
- none
Q19 | Eddy current test may be used to find out
- defect
- type of the heat treatment given to material
- change in chemical composition
- all of theabove
Q20 | Principle of operation of eddy current test isbased on the
- developmentof emf
- types of current supplied to the material
- piezoelectricity
- ferroelectricity
Q21 | Which one is not a part of magnafluxprocess?
- surface preparation
- magnetization
- demagnetization
- observation under microscope
Q22 | The horizontal cracks sre detected inmagnaflux test by
- circular magnetizatio n
- longitudinal magnetizatio n
- demagnetization
- all of theabove
Q23 | The circular cracks are detected in magnafluxtest by
- circular magnetizatio n
- longitudinal magnetizatio n
- demagnetization
- all of theabove
Q24 | The purpose of developer is to make thepenetrant
- in the crack invisible
- in the crackvisible
- chemically highly reactive
- all of theabove
Q25 | If the care is not taken during magnaflux testthen. .... is possible
- local heating and sparking
- explosion
- harmful uvradiation
- none