FUELS AND COMBUSTION QUIZ

Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

All of these

1kg mole

22.4 Nm³

32 kg

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?

Producer gas

Natural gas

Liquified petroleum gas

Carburetted water gas

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Free carbon content in tar

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

Yield percentage of coke

Yield of ammonia present in coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Ionisation potential applied across the electrodes of electrostatic tar precipitator is around

60 KV AC

230 V AC

60 KV DC

230 V DC

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YOUR ANSWER : ?

__________ has the widest inflammability limit (explosion limit) of all the gases.

Acetylene

Hydrogen

Methane

Carbon monoxide

TRUE ANSWER : ?
YOUR ANSWER : ?

Advantages of fluidised bed combustion are

Reduced NOx formation in flue gas

High heat transfer rate

Lower furnace operating temperature

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is

200 °C

200 °F

200 °R

200 °K

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is used as jet engine fuel.

Petrol

Kerosene

Diesel

LPG

TRUE ANSWER : ?
YOUR ANSWER : ?

During combustion of gaseous fuels, deficiency of air

Tends to shorten the flame

Increases the flame temperature

Does not affect the flame length

Lengthens the flame

TRUE ANSWER : ?
YOUR ANSWER : ?

In high temperature carbonisation (as compared to low temperature carbonisation) of coal

All of these

Coke oven gas yield is more

Calorific value of coke oven gas is less

Tar yield is less but free carbon in tar is more

TRUE ANSWER : ?
YOUR ANSWER : ?

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