Mechanical Engineering MCQs

Page No. 29

DuraJomin contains___________________?


a94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe


b92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg


c10% aluminium and 90% copper


d90% magnesium and 9% aluminium with some copper



Phosphor bronze contains____________________?


a0.5% of phosphorous


b1% phosphorous


c2.5% phosphorous


dnone of the above


View Answer none of the above

Delta metal is an alloy of__________________?


acopper, zinc and iron


biron, nickel and copper


ciron, lead and tin


diron, aluminium and magnesium


View Answer copper, zinc and iron

Which of the following alloys does not contain tin_________________?


awhite metal


bsolder admiralty


cfusible metal


dphosphor bronze


View Answer white metal

Addition of copper to aluminium results in_____________________?


aimprovement of casting characteristics


bimprovement of corrosion resistance


cone of the best known age and precipitation-hardening systems


dimproving machinability



Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?


airon


bcopper


caluminium


dnickel


View Answer nickel

Addition of lead and bismuth to aluminium results in_________________?


aimprovement of casting characteristics


bimprovement of corrosion resistance


cone of the best known age and precipitation-hardening systems


dimproving machinability



Constantant an alloy used in thermocouples is an alloy of __________________?


acopper and tin


bcopper and zinc


ccopper and iron


dcopper and nickel


View Answer copper and nickel

German silver contains_________________?


a1% silver


b2.5% silver


c5% silver


d10% silver


View Answer 5% silver

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



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