Fuels and Combustion MCQs

Question 1

With increase in C/H ratio of a fuel, the dew point of flue gases

Accepted Answer

Decreases

Answer

Increases

Answer

Remains same

Answer

May increase or decrease ; depends on the type of fuel

Question 2

Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal?

Accepted Answer

Vitrain

Answer

Clarain

Answer

Durain

Answer

Fussain

Question 3

Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.

Accepted Answer

>120

Answer

<120

Answer

<90

Answer

90-110

Question 4

Percentage of nitrogen in blast furnace gas may be around

Accepted Answer

55

Answer

5

Answer

25

Answer

80

Question 5

Percentage of carbon monoxide in blast furnace gas may be around

Accepted Answer

22

Answer

8

Answer

14

Answer

52

Question 6

About __________ Nm3 of air will be required for the complete combustion of 2 Nm3 of CO.

Accepted Answer

5

Answer

2

Answer

3

Answer

1

Question 7

Lignite is

Accepted Answer

Can be used for gasification and steam generation

Answer

A high rank coal

Answer

A coking coal

Answer

A black banded coal which burns with a non-smoky yellowish flame

Question 8

Which of the following is called "blue gas"?

Accepted Answer

Water gas

Answer

Coke oven gas

Answer

Natural gas

Answer

Producer gas

Question 9

Low temperature carbonisation

Accepted Answer

Is mainly for producing the smokeless domestic coke

Answer

Is meant for the production of 'metallurgical coke'

Answer

Produces higher quantity of gas than high temperature carbonisation

Answer

Produces less quantity of tar than high temperature carbonisation