⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs81
Aluminium bronze contains__________________?
A94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
C10% aluminium and 90% copper
D90% magnesium and 9% aluminium with some copper E. 10% aluminium and 90% tin
82
Foundry crucible is made of_________________?
Amild steel
Bgerman silver
Clead
Dcast iron E. graphite
83
Which of the following has highest specific strength of all structural materials__________________?
Amagnesium alloys
Btitanium alloys
Cchromium alloys
Dmagnetic steel alloys E. none of the above
84
White metal contains__________________?
A63 to 67% nickel and 30% copper
B88% copper and 10% tin and rest zinc
Calloy of tin, lead and cadmium
Dsilver and chromium E. malleable cast iron and silver
85
Addition of silicon to aluminium results in____________________?
Aimprovement of casting characteristics
Bimprovement of corrosion resistance
Cone of the best known age and precipitation-hardening systems
Dimproving machinability E. none of the above
86
Which of the following alloys does not have copper as one of the constituents________________?
Adelta metal
Bmonel metal
Cconstantan
Dnichrome E. silicon bronze
87
Addition of manganese to aluminium results in__________________?
Aimprovement of casting characteristics
Bimprovement of corrosion resistance
Cone of the best known age and precipitation-hardening systems
Dimproving machinability E. none of the above
88
Which is false statement about properties of aluminium ___________________?
Amodulus of elasticity is fairly low
Bwear resistance is very good
Cfatigue strength is not high
Dcreep strength limits its use to fairly low temperatures E. corrosion resistance is good
89
Admiralty gun metal contains__________________?
A63 to 67% nickel and 30% copper
B88% copper, 10% tin and rest zinc
Calloy of tin, lead and cadmium
Diron scrap and zinc E. none of the above
90
Dow metal contains____________________?
A94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
C90% aluminium and 90% copper
D90% magnesium and 9% aluminium with some copper E. 90% magnesium and 10% tin