Fuels and Combustion MCQs

Question 1

Water gas constitutes mainly of

Accepted Answer

CO & H 2

Answer

CO & N 2

Answer

CO 2 & H 2

Answer

CH 4 & H 2

Question 2

The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

Accepted Answer

CO 2 , O 2 , CO

Answer

CO, O 2 , CO 2

Answer

CO 2 , CO, O 2

Answer

O 2 , CO 2 , CO

Question 3

With increase in the temperature of carbonisation of coal

Accepted Answer

All of the above

Answer

Hydrogen content of coke oven gas increases due to cracking of hydrocarbons

Answer

Methane content in the coke oven gas decreases and carbon monoxide content increases

Answer

Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H 2 content

Question 4

Pick out the wrong statement.

Accepted Answer

The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point

Answer

LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals

Answer

Each ton of petroleum oil on distillation produces about 30 - 50 Nm 3 of gas

Answer

Maximum yield of naphthalene is obtained on distillation of crude oil

Question 5

When steam is passed over coal resulting in the endothermic reaction represent by, C + H 2 O = CO + H 2 , it is called the __________ of coal.

Accepted Answer

Gasification

Answer

Carbonisation

Answer

Oxidation

Answer

Coalification

Question 6

Which of the following will generate maximum volume of product of complete combustion (Nm 3 /Nm 3 of fuel)?

Accepted Answer

Natural gas

Answer

Carburetted water gas

Answer

Blast furnace gas

Answer

Producers gas

Question 7

The gas which contributes maximum to the heating value of natural gas is

Accepted Answer

CH 4

Answer

CO

Answer

CO 2

Answer

H 2

Question 8

L.D. converter gas (produced in steel plant) comprises mainly of

Accepted Answer

CO (upto 65%) & CO 2

Answer

CO 2 & H 2

Answer

CO & O 2

Answer

CO 2 & O 2

Question 9

Main constituents of purified Lurgi gas are

Accepted Answer

CO, H 2 & CH 4

Answer

H 2 , C m H n & CO 2

Answer

CO 2 , O 2 & CO

Answer

N 2 , H 2 & CO 2