Materials and Construction MCQs

Question 1

Cast iron has

Accepted Answer

Its elastic limit very close to ultimate breaking strength

Answer

High ductility

Answer

High malleability

Answer

Very high tensile strength

Question 2

Hardest materials so far found is

Accepted Answer

Diamond

Answer

Graphite

Answer

Carborundum

Answer

Pumice stone

Question 3

Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of

Accepted Answer

Stainless steel or glass lined vessel

Answer

Cast iron

Answer

Karbate

Answer

Wrought iron

Question 4

Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of

Accepted Answer

Stainless steel or glass lined steel

Answer

Nickel clad steel

Answer

High silicon cast iron

Answer

Aluminium

Question 5

Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as

Accepted Answer

Sheradising

Answer

Parkerising

Answer

Anodising

Answer

None of these

Question 6

The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called

Accepted Answer

Bauschinger effect

Answer

Hooke's effect

Answer

Hysterisis

Answer

Relaxation

Question 7

Duralumin is an alloy of

Accepted Answer

Aluminium, copper and manganese

Answer

Aluminium, nickel and silicon

Answer

Aluminium and nickel

Answer

None of these

Question 8

Duriron is

Accepted Answer

All of the above

Answer

Acid resistant, brittle and very hard

Answer

High silicon iron

Answer

Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion

Question 9

Which of the following crystal structures characterises the austenitic stainless steel?

Accepted Answer

Face centred cubic

Answer

Simple hexagonal

Answer

Body centred cubic

Answer

None of these