ENGINEERING MATERIALS QUIZ

The toughness of a material __________ when it is heated.

Increases

None of these

Decreases

Remain same

TRUE ANSWER : ?
YOUR ANSWER : ?

German silver is an alloy of

Silver and some impurities

Nickel and copper

Nickel, Copper and zinc

Refined silver

TRUE ANSWER : ?
YOUR ANSWER : ?

When medium carbon steel is heated to coarsening temperature

The average grain size is a minimum

The grain size increases very rapidly

The grain size first increases and then decreases very rapidly

There is no change in grain size

TRUE ANSWER : ?
YOUR ANSWER : ?

The defect which takes place due to imperfect packing of atoms during crystallization is known as

Point defect

Line defect

None of these

Surface defect

TRUE ANSWER : ?
YOUR ANSWER : ?

Cast iron is manufactured in

Cupola

Open hearth furnace

Blast furnace

Bessemer converter

TRUE ANSWER : ?
YOUR ANSWER : ?

The strength is the ability of a material to resist

None of these

Externally applied forces with breakdown or yielding

Fracture due to high impact loads

Deformation under stress

TRUE ANSWER : ?
YOUR ANSWER : ?

The molecules in a solid move

In a random manner

Back and forth like tiny pendulums

In a haphazard way

In circular motion

TRUE ANSWER : ?
YOUR ANSWER : ?

Blast furnace produces following by reduction of iron ore

Wrought iron

Malleable iron

Pig iron

Cast iron

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following material has maximum ductility?

Aluminium

Nickel

Mild steel

Copper

TRUE ANSWER : ?
YOUR ANSWER : ?

Pearlite consists of

13% cementite and 87% ferrite

13% carbon and 87% ferrite

6.67% carbon and 93.33% iron

13% ferrite and 87% cementite

TRUE ANSWER : ?
YOUR ANSWER : ?

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