Materials and Construction MCQs

Question 1

Carbon content in plain carbon steel is __________ percent.

Accepted Answer

0.35 to 0.45

Answer

0.1 to 0.15

Answer

0.65 to 0.80

Answer

0.85 to 1.2

Question 2

Constantan used in thermocouples is an alloy of

Accepted Answer

None of these

Answer

Iron & copper

Answer

Copper & aluminium

Answer

Lead & tin

Question 3

__________ does not contain tin as an alloying material.

Accepted Answer

Brass

Answer

Pewter

Answer

Solder

Answer

Babbit metal

Question 4

Which of the following finds the least commercial use?

Accepted Answer

Pure iron

Answer

High silicon iron

Answer

Low carbon steel

Answer

High carbon steel

Question 5

Pick out the wrong statement.

Accepted Answer

Tin can be readily and very easily drawn into very fine wire

Answer

Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature

Answer

Tin exists in two allotropic forms

Answer

The predominant use of tin is in the form of coating for steel & copper alloys

Question 6

A hardened steel essentially contains

Accepted Answer

Martensite

Answer

Sorbite

Answer

Troostite

Answer

None of these

Question 7

Diamagnetic materials are magnetised

Accepted Answer

In a direction opposite to that of the applied field

Answer

Strongly

Answer

Only slightly

Answer

With eddy currents only

Question 8

Which of the following comprises of hydrocarbons?

Accepted Answer

Rubber

Answer

Mica flakes

Answer

Glass

Answer

None of these

Question 9

Specify the material of construction suitable for handling concentrated HNO 3 at 100°C.

Accepted Answer

High silicon iron, Kel-F and teflon

Answer

Tin and wood

Answer

Silicone rubber

Answer

Stainless steel