FUELS AND COMBUSTION QUIZ

Function of secondary air in pulverised coal firing is to

Transport the coal to the burner

Dry the coal

Ensure efficient burning of coal around the burner

Reduce primary air requirement

TRUE ANSWER : ?
YOUR ANSWER : ?

Bomb calorimeter is used for the determination of calorific value of the __________ fuels.

Gaseous

Solid

Both B and C

Liquid

TRUE ANSWER : ?
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Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

22.4 Nm³

1kg mole

All of these

32 kg

TRUE ANSWER : ?
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Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.

Fixed

Moving

Fluidised

Entrained

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The function of secondary combustion air is to

Burn the lumpy coal

Completely burn the volatile matter

Pneumatically convey the pulverised coal

None of these

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

CO₂

H₂

CO

CH₄

TRUE ANSWER : ?
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Orsat apparatus is meant for

Finding out combustion efficiency

None of these

Gravimetric analysis of flue gas

Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride

TRUE ANSWER : ?
YOUR ANSWER : ?

Hard pitch is used for making

Perfumes

Plastics

Insecticides

Pulverised fuel

TRUE ANSWER : ?
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Insitu theory and drift theory are related to the

Origin of coal

Variation of coal quality with depth

Coalification

Origin of petroleum oil

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With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases.

Methane

All of these

Hydrogen

Unsaturated hydrocarbons

TRUE ANSWER : ?
YOUR ANSWER : ?

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