Mechanical Engineering MCQs

Page No. 42

Brass (alloy of copper and zinc) is an example of__________________?


asubstitutional solid solution

✓


binterstitial solid solution

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cintermetallic compounds

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dall of the above

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Argentite is the principal ore or raw material for _________________?


aaluminium

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btin

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czinc

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dsilver

✓


View Answer silver

Which is false statement about normalizing. Normalizing is done to _________________?


arefine grain structure

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breduce segregation in casting

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cimprove mechanical properties

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dinduce stresses-

✓


View Answer induce stresses-

Amorphous material is one___________________?


ain which atoms align themselves in a geometric pattern upon solidification

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bin which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

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cwhich is not attacked by phosphorous

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dwhich emits fumes on melting

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An example of amorphous material is____________?


azinc

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blead

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csilver

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dglass

✓


View Answer glass

Which is false statement about case hardening. Case hardening is done by_______________?


aelectroplating

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bcyaniding

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cinduction hardening

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dnitriding

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View Answer electroplating

Chromium in steel_________________?


aimproves wear resistance, cutting ability and toughness

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brefines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

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cimproves cutting ability and reduces hardenability

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dgives ductility, toughness, tensile strength and anticorrosion properties

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Cemented carbide tools are not found to be suitable for cutting_______________?


abrass

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bcast iron

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caluminium

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dsteel

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View Answer steel

Which of the following is the binding material in cemented carbides___________________?


acobalt

✓


bnickel

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cvanadium

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diron

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View Answer cobalt

Which is false statement about tempering. Tempering is done to_______________?


aimprove machinability

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bimprove ductility

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cimprove toughness

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drelease stresses

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View Answer improve machinability

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