Mechanical Engineering MCQs

Page No. 30

Age-hardening is related with______________?


astainless steel

✖


bgun metal

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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

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dall of the above

✖



The transistor is made of___________________?


asilver

✖


bgold

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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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