Materials and Construction MCQs

Question 1

Which is the purest form of iron?

Accepted Answer

Wrought iron

Answer

Pig iron

Answer

Bessemer iron

Answer

Grey iron

Question 2

Pick out the wrong statement.

Accepted Answer

Thermal conductivity of aluminium is higher than that of copper; hence it is increasingly used for utensil making

Answer

Pure rubber is as useless as pure gold as a material of construction

Answer

Copper has poor weldability

Answer

Reinforced plastics are made from both thermoplastic as well as thermosetting plastics

Question 3

High speed steel should have high

Accepted Answer

Both B & C

Answer

Toughness

Answer

Wear resistance

Answer

Hardenability

Question 4

High carbon steel contains more than __________ percent carbon.

Accepted Answer

0.5

Answer

2.2

Answer

2.5

Answer

2.8

Question 5

Which of the following exercises most powerful influence on the mechanical properties of steel?

Accepted Answer

Carbon

Answer

Manganese

Answer

Phosphorous

Answer

Silicon

Question 6

Hardened steel is softened by

Accepted Answer

Tempering

Answer

Normalising

Answer

Annealing

Answer

Carburising

Question 7

Which of the following has the poorest weldability?

Accepted Answer

High-carbon steel

Answer

Low carbon steel

Answer

Mild steel

Answer

Wrought iron

Question 8

Hastelloy comprises of

Accepted Answer

Molybdenum and nickel

Answer

Copper and tin

Answer

Copper and nickel

Answer

Lead and tin

Question 9

The 'bomb' in the bomb calorimeter is made of

Accepted Answer

Molybdenum stainless steel

Answer

Mild steel

Answer

High silicon iron (14% Si)

Answer

Copper