Fuels and Combustion MCQs

Question 1

Benzene is used

Accepted Answer

For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)

Answer

As a motor fuel

Answer

As an explosive

Answer

As a perfume

Question 2

Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

Accepted Answer

Electrode manufacture

Answer

Decolourisation of sugar

Answer

Solvent recovery from air and gases

Answer

Absorption of gases and vapor

Question 3

Bright coal

Accepted Answer

Contains mainly vitrain & clarain and is generally coking

Answer

Contains more than 90% durain

Answer

Contains more than 90% fussain

Answer

Is non-coking

Question 4

'Fuel' can be defined as a substance which produces heat by

Accepted Answer

All of the above

Answer

Combustion

Answer

Nuclear fission

Answer

Nuclear fusion

Question 5

Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

Accepted Answer

50

Answer

1000

Answer

5000

Answer

10000

Question 6

Caking coal is desirable for

Accepted Answer

Coke making

Answer

Burning on travelling grate

Answer

Burning on firebars

Answer

All of the above

Question 7

When steam is passed over coal resulting in the endothermic reaction represent by, C + H2O = CO + H2, it is called the __________ of coal.

Accepted Answer

Gasification

Answer

Carbonisation

Answer

Oxidation

Answer

Coalification

Question 8

Calorific value of

Accepted Answer

Light paraffinic fuel oils is higher than that of equivalent olefins

Answer

Light paraffinic fuel oils is equal to that of equivalent olefins

Answer

N-paraffin is lower than that of iso-paraffins of the same compounds

Answer

Light paraffinic fuel oils is lower than that of equivalent olefins

Question 9

As time passes, the calorific value of stored coal

Accepted Answer

Decreases

Answer

Increases

Answer

Remains unaltered

Answer

May increase or decrease (depends on the method of storage)