Engineering Materials MCQs

Question 1

Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

Accepted Answer

Nichrome

Answer

Babbitt metal

Answer

Monel metal

Answer

Phosphor bronze

Question 2

In the lower part of the blast furnace (zone of fusion), the temperature is

Accepted Answer

1200°C to 1300°C

Answer

400°C to 700°C

Answer

800°C to 1000°C

Answer

1500°C to 1700°C

Question 3

The heat treatment process used for softening hardened steel is

Accepted Answer

Tempering

Answer

Carburising

Answer

Normalizing

Answer

Annealing

Question 4

Which of the following impurity in cast iron makes it hard and brittle?

Accepted Answer

Sulphur

Answer

Silicon

Answer

Manganese

Answer

Phosphorus

Question 5

An engineer's hammer is made of

Accepted Answer

High carbon steel

Answer

Cast iron

Answer

Forged steel

Answer

Mild steel

Question 6

The alloying element which can replace tungsten in high speed steels is

Accepted Answer

Molybdenum

Answer

Nickel

Answer

Vanadium

Answer

Cobalt

Question 7

Grey cast iron

Accepted Answer

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Answer

Is also known as chilled cast iron is obtained by cooling rapidly

Answer

Is produced by annealing process. It is soft, tough and easily machined metal

Answer

Is produced by small additions of magnesium or cerium in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material

Question 8

Which of the following element results in presence of free graphite in C.I.?

Accepted Answer

Silicon

Answer

Carbon

Answer

Sulphur

Answer

Manganese

Question 9

The percentage carbon content in wrought iron is about

Accepted Answer

0.02

Answer

0.1

Answer

2

Answer

0.4