Engineering Materials MCQs

Question 1

Age-hardening is related with

Accepted Answer

Duralumin

Answer

Stainless steel

Answer

Gun metal

Answer

German silver

Question 2

The lower critical point for all steels is

Accepted Answer

723°C

Answer

600°C

Answer

700°C

Answer

913°C

Question 3

Tensile strength of steel can be safely increased by

Accepted Answer

Adding carbon up to 0.83%

Answer

Adding carbon up to 2.8%

Answer

Adding carbon up to 6.3%

Answer

Adding small quantities of copper

Question 4

Basic constituents of Monel metal are

Accepted Answer

Nickel, copper

Answer

Nickel, molybdenum

Answer

Zinc, tin, lead

Answer

Nickel, lead and tin

Question 5

Steel with __________ carbon is known as hypo-eutectoid steel.

Accepted Answer

Below 0.8%

Answer

0.8%

Answer

Above 0.8%

Answer

None of these

Question 6

In spheroidising process, the steel is

Accepted Answer

Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

Answer

Heated below the lower critical temperature and then cooled slowly

Answer

Heated up to the lower critical temperature and then cooled in still air

Answer

None of the above

Question 7

Lead is poured into the joint between two pipes. These pipes may be made of

Accepted Answer

Cast iron

Answer

Vitrified clay

Answer

Asbestos cement

Answer

Concrete

Question 8

Constantan an alloy used in thermocouples is an alloy of

Accepted Answer

Copper and nickel

Answer

Copper and tin

Answer

Copper and zinc

Answer

Copper and iron

Question 9

The hardness of steel increases if it contains

Accepted Answer

Martensite

Answer

Austenite

Answer

Pearlite

Answer

Cementite