Fuels and Combustion MCQs

Question 1

A travelling grate stoker is meant for the efficient burning of __________ coal.

Accepted Answer

Non-caking

Answer

Caking

Answer

Pulverised

Answer

High ash

Question 2

A coal having higher volatile matter content will necessarily have lower

Accepted Answer

Ignition temperature

Answer

Ash fusion temperature

Answer

Calorific value

Answer

Caking index

Question 3

The gasification reaction represented by, C + H2O = CO + H2, is

Accepted Answer

Endothermic

Answer

Exothermic

Answer

Catalytic

Answer

Autocatalytic

Question 4

The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called

Accepted Answer

Burning temperature

Answer

Fire point

Answer

Smoke point

Answer

Kindling temperature

Question 5

Atomising steam to fuel oil ratio in a burner should be around

Accepted Answer

0.5

Answer

1.5

Answer

2.5

Answer

3.5

Question 6

Volumetric ratio of N2 to O2 in dry atmospheric air is

Accepted Answer

3.76

Answer

0.21

Answer

4.76

Answer

0.79

Question 7

Combustion of pulverised coal compared to the lumpy coal

Accepted Answer

All of the above

Answer

Provides better control of furnace temperature

Answer

Facilitates combustion with lower excess air

Answer

Provides higher thermal efficiency & flame temperature

Question 8

Use of pulverised coal in boiler furnace provides

Accepted Answer

Better combustion

Answer

High calorific value

Answer

Smokeless burning

Answer

Less erosion on furnace walls

Question 9

Which of the following is the maximum coal producing state in India?

Accepted Answer

Jharkhand

Answer

Orissa

Answer

West Bengal

Answer

Assam