FUELS AND COMBUSTION QUIZ

Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces

Higher amount of methane

Lower amount of hydrogen

Both A & B

Higher amount of both methane and hydrogen

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of a gas of composition CO₂ = 20%, H₂ = 50%, CH₄ = 30%, is y. If the composition of gas is changed to H₂ = 50%, CH₄ = 30%, CO₂ = 10%, N₂ = 10%, then the calorifice value will be

1.05 y

1.8 y

Y

0.95 y

TRUE ANSWER : ?
YOUR ANSWER : ?

Moisture loss is determined by the

Humidity of combustion air

The water formed by combustion reaction

Both A and B

Moisture content of fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

'Fat' coal means a coal having

Non smoking tendency

High volatile matter

Low ash content

Low calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Mott and Wheeler test is conducted on coke to find its

Abradability

Volatile matter content

Phosphorus content

Reactivity with O₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Preheating of a gaseous fuel results in increased

Flame length

Quantity of flue gas

Flame temperature

Ignition temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Orsat apparatus

All of these

Can

Determines N₂ in flue gas indirectly

Gives flue gas analysis on dry basis

TRUE ANSWER : ?
YOUR ANSWER : ?

In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.

Yield of ammonia present in coke oven gas

Free carbon content in tar

Difference in gross & net calorific value of the coke oven gas

Yield percentage of coke

TRUE ANSWER : ?
YOUR ANSWER : ?

Carbon Content by weight in air dried wood may be about __________ percent.

50

80

25

10

TRUE ANSWER : ?
YOUR ANSWER : ?

Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.

35

20

5

10

TRUE ANSWER : ?
YOUR ANSWER : ?

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