FUELS AND COMBUSTION QUIZ

Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in

Air

Either A or B

Either A or C without gain or loss of heat

Oxygen

TRUE ANSWER : ?
YOUR ANSWER : ?

Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

70-100

15-30

150-200

43832

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of bituminous coal may be around __________ Kcal/kg.

6500

20000

1500

500

TRUE ANSWER : ?
YOUR ANSWER : ?

Coalification means the

Process of conversion of lignite into anthracite

Complete combustion of coal

Underground gasification of coal

Direct hydrogenation of coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a poisonous fuel gas?

Natural gas

Blast furnace gas

None of these

Coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

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

CH₄

CO₂

H₂

CO

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1

2

4

6

TRUE ANSWER : ?
YOUR ANSWER : ?

Highly reactive coke have lower

Coke reactivity index (CRI)

Both B and C

Critical air blast (CAB) value

Porosity

TRUE ANSWER : ?
YOUR ANSWER : ?

Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

30

180

120

65

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke oven gas compared to blast furnace gas is

Lighter

More explosive and inflammable

All of these

Less poisonous

TRUE ANSWER : ?
YOUR ANSWER : ?

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