Materials and Construction MCQs

Question 1

A material no longer behaves elastically beyond

Accepted Answer

Elastic limit

Answer

Plastic limit

Answer

Limiting load

Answer

Breaking load

Question 2

German silver in an alloy of

Accepted Answer

Copper, nickel and zinc

Answer

Copper, aluminium and silver

Answer

Silver, zinc and aluminium

Answer

Silver, nickel and zinc

Question 3

Which of the following is the lightest of engineering metals?

Accepted Answer

Magnesium

Answer

Aluminium

Answer

Titanium

Answer

Tin

Question 4

Glass is corroded by

Accepted Answer

Fluorine (dry or wet)

Answer

Sulphuric acid

Answer

Phosphoric acid

Answer

None of these

Question 5

Graphite is a good

Accepted Answer

Both B & C

Answer

Thermal & electrical insulator

Answer

Conductor of heat

Answer

Conductor of electricity

Question 6

Graphite is corroded by

Accepted Answer

None of these

Answer

Sulphuric acid (10%)

Answer

Sea water

Answer

Hydrochloric acid

Question 7

Fatigue strength of a material increases by

Accepted Answer

Under stressing the specimen

Answer

Having notches in the specimen

Answer

Rise in temperature

Answer

Having scratches on the surface

Question 8

Which of the following alloy steels is the most suitable for making gun barrels and projectiles?

Accepted Answer

Nickel-chrome steel

Answer

Tungsten steel

Answer

Molybdenum steel

Answer

Cobalt steel

Question 9

Gun metal is an alloy of

Accepted Answer

Copper, tin and zinc

Answer

Nickel, tin and copper

Answer

Copper, phosphorus and nickel

Answer

Manganese, phosphorus and nickel