FUELS AND COMBUSTION QUIZ

Fuel for a fast breeder nuclear reactor is

Neptunium

Radium

Plutonium

Uranium

TRUE ANSWER : ?
YOUR ANSWER : ?

A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

Presence of large quantity of hydrogen in the fuel

High sulphur content in the fuel

Lack of thorough mixing of fuel with air

Low calorific value of the fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?

50

100

85

70

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant?

None of these

Ammonium phosphate

Ammonium sulphate

Ammonium nitrate

TRUE ANSWER : ?
YOUR ANSWER : ?

Highly caking coals

Produce weak coke

Both B and C

May damage the coke oven walls during carbonisation

Produce strong coke

TRUE ANSWER : ?
YOUR ANSWER : ?

Fussain

Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal

Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation

Is friable, charcoal like substance

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen required for theoretically complete combustion of 1 Nm³ methane is __________ Nm³.

1

4

2

6

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke oven gas constitutes mainly of

H₂ & CO

H₂ & CH₄

H₂ & CO₂

CH₄ & CO

TRUE ANSWER : ?
YOUR ANSWER : ?

The main advantage of forced draft over natural draft is that

Combustion of fuel is complete

All of these

Furnace control is easier

Smaller height chimney can be used

TRUE ANSWER : ?
YOUR ANSWER : ?

Largest constituent of coke oven gas is

H₂

CH₄

CO₂

N₂

TRUE ANSWER : ?
YOUR ANSWER : ?