Engineering Materials MCQs

Question 1

Solder is an alloy consisting of

Accepted Answer

Tin and lead

Answer

Tin, antimony, copper

Answer

Tin and copper

Answer

Lead and zinc

Question 2

Malleable cast iron

Accepted Answer

Is produced by annealing process. It is soft, tough and easily machined metal

Answer

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Answer

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Answer

Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the nodular or spheroidal form and is well dispersed throughout the material

Question 3

Bell metal contains

Accepted Answer

70 - 75% copper and rest tin

Answer

70% copper and 30% zinc

Answer

90% copper and 10% tin

Answer

85 - 92% copper and rest tin with little lead and nickel

Question 4

Which is false statement about normalizing? Normalizing is done to

Accepted Answer

Induce stresses

Answer

Refine grain structure

Answer

Reduce segregation in casting

Answer

Improve mechanical properties

Question 5

Chilled cast iron has

Accepted Answer

No graphite

Answer

A very high percentage of graphite

Answer

A low percentage of graphite

Answer

Graphite as its basic constituent of composition

Question 6

The aluminium alloy, mainly used, for anodized utensil manufacture, is

Accepted Answer

Hindalium

Answer

Duralumin

Answer

Y-alloy

Answer

Magnalium

Question 7

The machinability of steel is increased by

Accepted Answer

Phosphorous, lead and sulphur

Answer

Silicon and sulphur

Answer

Sulphur, graphite and aluminium

Answer

Phosphorous and aluminium

Question 8

The hardness is the property of a material due to which it

Accepted Answer

Can cut another metal

Answer

Can be drawn into wires

Answer

Breaks with little permanent distortion

Answer

Can be rolled or hammered into thin sheets

Question 9

White cast iron has

Accepted Answer

All of these

Answer

Carbon in the form of carbide

Answer

Low tensile strength

Answer

High compressive strength