Materials and Construction MCQs

Question 1

Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of

Accepted Answer

Stainles steel

Answer

Aluminium

Answer

High silicon (14%) iron

Answer

Copper

Question 2

Trough of an apron conveyor is made of

Accepted Answer

Either B or C

Answer

Lead lined concrete vessel

Answer

Wood

Answer

Metal

Question 3

Presence of cobalt in steel improves its

Accepted Answer

Cutting ability

Answer

Corrosion resistance

Answer

Tensile strength

Answer

None of these

Question 4

Most suitable material of construction for the storage of concentrated nitric acid is

Accepted Answer

Aluminium or chromium alloys (Cr > 18% for cold acid)

Answer

Cast iron

Answer

Monel

Answer

Karbate

Question 5

Which of the following pairs of elements may form an alloy?

Accepted Answer

Iron & carbon

Answer

Iron & mercury

Answer

Platinum & mercury

Answer

None of these

Question 6

The damage/deterioration of metals by the __________ action of fluids is called 'erosion'.

Accepted Answer

Abrasive

Answer

Corrosive

Answer

Both A & B

Answer

Neither A nor B

Question 7

Pick out the wrong statement.

Accepted Answer

Wrought iron can not be easily forged and welded

Answer

Wrought iron contains about 0.02% carbon

Answer

The chilled cast iron does not contain graphite

Answer

Spheroidal grey cast iron contains graphite flakes

Question 8

The crystal structure of most of the common metals is

Accepted Answer

Cubic

Answer

Orthorhombic

Answer

Hexagonal

Answer

None of these

Question 9

Presence of nickel in steel improves its

Accepted Answer

Corrosion resistance

Answer

Cutting ability

Answer

Wear resistance

Answer

All of the above