Mechanical Engineering MCQs

Page No. 30

Age-hardening is related with______________?


astainless steel


bgun metal


cgerman silver


dduralumin


View Answer duralumin

Babbit metal is a_________________?


alead base alloy


btin base alloy


ccopper base alloy


dA. and C. above


View Answer A. and C. above

Acidic solution is one which has pH value__________________?


agreater than 7


bless than 7


cequal to 7


dpH value has nothing to do with neutral solution


View Answer less than 7

Following elements have face-centred cubic structure__________________?


agamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt


bMg, Zn, Ti, Zr, Br, Cd


ca iron (below 910°C and between 1400 to 1539°C), W


dall of the above



The transistor is made of___________________?


asilver


bgold


ccopper


dgermanium


View Answer germanium

Pearlite is a combination of___________________?


aferrite and cementite


bcementite and gamma iron


cferrite and austenite


dferrite and iron graphite


View Answer ferrite and cementite

Lead is poured into the joint between two pipes. These pipes may be made of____________________?


acast iron


bvitrified clay


casbestos cement


dconcrete


View Answer cast iron

Austenite rs a combination of_________________?


aferrite and cementite


bcementite and gamma iron


cferrite and austenite


dferrite and iron graphite



Recrystallisation temperature can belowered by_________________?


apurification of metal


bgrain refinement


cworking at lower temperature


dall of the above


View Answer all of the above

Basic solution is one which has pH value___________________?


agreater than 7


bequal to 7


cless than 7


dpH value has nothing to do with basic solution


View Answer greater than 7

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