Materials and Construction MCQs

Question 1

Mild steel is

Accepted Answer

A low carbon steel (0.05 to 0.3% carbon)

Answer

Highly resistant to corrosion (as much as stainless steel)

Answer

A high carbon steel (0.5 to 1.5% carbon)

Answer

Very poor in strength & ductility

Question 2

Pick out the wrong statement.

Accepted Answer

Cold working of a metal decreases its fatigue strength

Answer

The toughness of a material decreases, when it is heated

Answer

Crane hooks are normally made of wrought iron

Answer

The temperature at which new grains are formed in a metal is known as the recrystallisation temperature

Question 3

Mild steel is used for making

Accepted Answer

Channels

Answer

Fish plates

Answer

Die block

Answer

Drop forging

Question 4

Monel alloy is

Accepted Answer

Used for making steam valves and turbine blades as it resists steam attack at high temperature

Answer

The costliest of all the alloys of nickel

Answer

Not suitable for making kitchen utensils

Answer

Not used in cast and wrought forms

Question 5

Monel metal is an alloy of

Accepted Answer

Nickel and copper

Answer

Molybdenum and nickel

Answer

Molybdenum and aluminium

Answer

Molybdenum and zinc

Question 6

The formation of oxide film on a metal due to atmospheric exposure reduces its

Accepted Answer

Creep limit

Answer

Toughness

Answer

Stiffness

Answer

All of the above

Question 7

Which of the following mechanical properties of a material is most structure insensitive?

Accepted Answer

Modulus of elasticity (young

Answer

Toughness

Answer

Percentage reduction of area

Answer

Tensile strength

Question 8

__________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working.

Accepted Answer

Strain ageing

Answer

Solid solution hardening

Answer

Screw dislocation

Answer

Twinning

Question 9

Muntz metal is a/an alloys of

Accepted Answer

Copper & zinc

Answer

Magnesium & tin

Answer

Ferrous material

Answer

Lead & tin