Engineering Materials MCQs

Question 1

When medium carbon steel is heated to coarsening temperature

Accepted Answer

The grain size increases very rapidly

Answer

There is no change in grain size

Answer

The average grain size is a minimum

Answer

The grain size first increases and then decreases very rapidly

Question 2

Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?

Accepted Answer

Manganese

Answer

Sulphur

Answer

Phosphorus

Answer

Silicon

Question 3

Recrystallization temperature is one

Accepted Answer

At which new spherical crystals first begin to form from the old deformed one when a strained metal is heated

Answer

At which crystals first start forming from molten metal when it is cooled

Answer

At which change of allotropic form takes place

Answer

At which crystals grow bigger in size

Question 4

Which of the following is the binding material in cemented carbides?

Accepted Answer

Cobalt

Answer

Nickel

Answer

Vanadium

Answer

Iron

Question 5

Which of the following statement is correct?

Accepted Answer

The chilled cast iron has no graphite

Answer

The product produced by blast-furnace is called cast iron

Answer

The pig iron is the name given to the product produced by cupola

Answer

The cast iron has high tensile strength

Question 6

Monel metal contains

Accepted Answer

63 to 67% nickel and 30% copper

Answer

88% copper and 10% tin and rest zinc

Answer

Alloy of tin, lead and cadmium

Answer

Malleable iron and zinc

Question 7

Inconel is an alloy of

Accepted Answer

Nickel, Chromium and Iron

Answer

Nickel, Copper

Answer

Nickel, Chromium

Answer

Nickel, Zinc

Question 8

The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Accepted Answer

Cobalt

Answer

Chromium

Answer

Nickel

Answer

Vanadium

Question 9

Manganese in steel increases its

Accepted Answer

Tensile strength

Answer

Hardness

Answer

Ductility

Answer

Fluidity