Materials and Construction MCQs

Question 1

As the impurities are oxidised, the melting point of iron

Accepted Answer

Increases

Answer

Decreases

Answer

Remains unchanged

Answer

May increase or decrease ; unpredictable

Question 2

Glass lined vessels are not used for handling

Accepted Answer

Hydrofluoric acid

Answer

Dilute H 2 SO 4

Answer

Dilute HNO 3

Answer

Dilute HCI

Question 3

Thermosetting resins are those polymers, which

Accepted Answer

Do not increase in plasticity with rise in temperature

Answer

Allow slip to occur between molecules

Answer

Do not take on a permanent set

Answer

None of these

Question 4

Lead lined equipments & vessels are suitable for handling

Accepted Answer

Sulphuric acid upto 60°C

Answer

Hydrochloric acid (10%)

Answer

Nitric acid

Answer

All of the above

Question 5

'Semi steel' is

Accepted Answer

Both A & B

Answer

Produced by adding 10-20% steel to the cupola charge

Answer

Stronger than cast iron

Answer

Neither A nor B

Question 6

Thermoplastic resins are those polymers, which

Accepted Answer

Easily deform under pressure at high temperature

Answer

Has decreased plasticity at increasing temperature

Answer

Can not be moulded

Answer

None of these

Question 7

Most common stainless steel type 316, which is highly resistant to corrosion contains

Accepted Answer

16-13% Cr 10-14% Ni and 2-3% Mo

Answer

20-22% Cr, and 8-10% Ni

Answer

2-4% Cr, 22% NI and 2-4% Mo

Answer

None of these

Question 8

Spark plugs are made of

Accepted Answer

High alumina ceramic

Answer

Metallic carbides

Answer

Corundum

Answer

Carborundum

Question 9

Which of the following commercial metals is most abundantly found in India?

Accepted Answer

Aluminium

Answer

Copper

Answer

Nickel

Answer

Zinc