Materials and Construction MCQs

Question 1

Ceramic recuperators are generally made of

Accepted Answer

Silicon carbide

Answer

Calcium carbide

Answer

Fireclay bricks

Answer

High alumina bricks

Question 2

'Hypersil' is a __________ steel.

Accepted Answer

Silicon

Answer

High speed

Answer

Molybdenum

Answer

Tungsten

Question 3

Perspex is nothing but

Accepted Answer

Acrylic sheet

Answer

An elastomer

Answer

An alloy of lead and tin

Answer

Aluminium foil clad with bakelite

Question 4

Phenol is not shipped in

Accepted Answer

Cast iron containers

Answer

Nickel lined steel tank cars

Answer

Galvanised or tin lined drums

Answer

Boxed glass carboys

Question 5

Pick out the wrong statement.

Accepted Answer

Presence of silicon in steel decreases its electrical resistance

Answer

Alloys are harder than their component elements

Answer

Karbate is an acid resistant material of construction

Answer

Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C

Question 6

Plastics are

Accepted Answer

Non-biodegradable

Answer

Used in very high temperature applications

Answer

Not suitable for drainage pipe manufacture

Answer

All of the above

Question 7

Invar used in thermocouples is an alloy of nickel and

Accepted Answer

Iron

Answer

Copper

Answer

Chromium

Answer

Lead

Question 8

Liquid ammonia is shipped in __________ containers.

Accepted Answer

Glass

Answer

Steel

Answer

Aluminium

Answer

Lead lined

Question 9

Which of the following is not a copper based alloy with nickel?

Accepted Answer

Inconel

Answer

German silver

Answer

Monel metal

Answer

Constantan