⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs41
The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?
Adecrease
Bincrease
Cremain constant
Dfirst increase and then decrease E. first decrease and then increase
42
Ductility of a material can be defined as__________________?
Aability to undergo large permanent deformations in compression
Bability to recover its original form
Cability to undergo large permanent deformations in tension
Dall of the above E. none of the above
43
Which one of the following metals would work-harden more quickly than the others__________________?
Acopper
Bbrass
Clead
Dsilver E. aluminium
44
The composition of silver solder is ___________________?
Asilver, copper, zinc
Bsilver, tin, nickel
Csilver, lead, zinc
Dsilver, copper, aluminium E. silver, lead, tin
45
The hardness of steel primarily depends on _____________________?
A%age of carbon
B%age of alloying elements
Cheat treatment employed
Dmethod of manufacture E. shape of carbides and their distribution in iron
46
Taps, dies and drills contain carbon________________?
Abelow 0.5%
Bbelow 1%
Cabove 1%
Dabove 2.2% E. nil
47
Large forgings, crank shafts, axles normally contain carbon up to________________?
A0.05 to 0.20%
B0.20 to 0.45%
C0.45 to 0.55%
D0.55 to 1.0% E. 1.0 to 1.2%.
48
Cold rolled steel sheets contain carbon of the following order___________________?
A0.1%
B0.2%
C0.4%
D0.6% E. 0.8%
49
Which of the following element results in presence of free graphite in C.I_________________?
Acarbon
Bsulphur
Csilicon
Dmanganese E. phosphorous
50
The machinability of steel is increased by___________________?
Asilicon and sulphur
Bphosphorous, lead and sulphur
Csulphur, graphite and aluminium
Dphosphorous and aluminium E. none of the above