Engineering Materials MCQs

Question 1

Following elements have face-centered cubic structure

Accepted Answer

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

Answer

Mg, Zn, Ti, Zr, Br, Cd

Answer

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

Answer

All of the above

Question 2

The crystal structure of brass is

Accepted Answer

F.C.C.

Answer

B.C.C.

Answer

H.C.P.

Answer

Orthorhombic crystalline structure

Question 3

Which of the following has highest specific strength of all structural materials?

Accepted Answer

Titanium alloys

Answer

Magnesium alloys

Answer

Chromium alloys

Answer

Magnetic steel alloys

Question 4

Blast furnace produces following by reduction of iron ore

Accepted Answer

Pig iron

Answer

Cast iron

Answer

Wrought iron

Answer

Malleable iron

Question 5

Shock resistance of steel is increased by adding

Accepted Answer

Nickel and chromium

Answer

Nickel

Answer

Chromium

Answer

Sulphur, lead and phosphorus

Question 6

Corrosion resistance of steel is increased by adding

Accepted Answer

Chromium and nickel

Answer

Nickel and molybdenum

Answer

Aluminium and zinc

Answer

Tungsten and sulphur

Question 7

Cobalt in steel

Accepted Answer

Improves cutting ability and reduce hardenability

Answer

Improves wear resistance, cutting ability and toughness

Answer

Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties

Answer

Gives ductility, toughness, tensile strength and anti corrosion property

Question 8

The electric process of steel making is especially adapted to

Accepted Answer

All of these

Answer

Alloy and carbon tool steel

Answer

Magnet steel

Answer

High speed tool steel

Question 9

Chromium in steel

Accepted Answer

Improves wear resistance, cutting ability and toughness

Answer

Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

Answer

Improves cutting ability and reduces hardenability

Answer

Gives ductility, toughness, tensile strength and anti-corrosion properties