Mechanical Engineering MCQs

Page No. 42

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


asubstitutional solid solution


binterstitial solid solution


cintermetallic compounds


dall of the above



Argentite is the principal ore or raw material for _________________?


aaluminium


btin


czinc


dsilver


View Answer silver

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


arefine grain structure


breduce segregation in casting


cimprove mechanical properties


dinduce stresses-


View Answer induce stresses-

Amorphous material is one___________________?


ain which atoms align themselves in a geometric pattern upon solidification


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


cwhich is not attacked by phosphorous


dwhich emits fumes on melting



An example of amorphous material is____________?


azinc


blead


csilver


dglass


View Answer glass

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


aelectroplating


bcyaniding


cinduction hardening


dnitriding


View Answer electroplating

Chromium in steel_________________?


aimproves wear resistance, cutting ability and toughness


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


cimproves cutting ability and reduces hardenability


dgives ductility, toughness, tensile strength and anticorrosion properties



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


abrass


bcast iron


caluminium


dsteel


View Answer steel

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


acobalt


bnickel


cvanadium


diron


View Answer cobalt

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


aimprove machinability


bimprove ductility


cimprove toughness


drelease stresses


View Answer improve machinability

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