FUELS AND COMBUSTION QUIZ

The fuel ratio of a coal is

The ratio of its percentage of fixed carbon to that of volatile matter

Both A and B

Helpful in estimation of its rank

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Narrow coke ovens as compared to wider coke ovens

Require less time of carbonisation

Produce smaller coke

All of these

Produce stronger coke

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value as determined by bomb calorimeter is the

Gross calorific value at constant pressure

Lower calorific value at constant pressure

Net calorific value at constant volume

Higher calorific value at constant volume

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a primary fuel?

Blast furnace coke

Wood charcoal

Natural gas

Gasoline

TRUE ANSWER : ?
YOUR ANSWER : ?

If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be

Very high, if the fuel is of low calorific value

Low

High

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

During its calorific value determination by bomb calorimeter, coal is combusted by

Air

Oxygen

None of these

Oxygen enriched air

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a poisonous fuel gas?

Natural gas

None of these

Blast furnace gas

Coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following coal gasification processes will produce gas having maximum methane content?

Winkler process

All of these

Kopper-Totzek process

Lurgi process

TRUE ANSWER : ?
YOUR ANSWER : ?

A good coking coal should have high __________ content.

Ash

Sulphur & phosphorus

None of these

Moisture

TRUE ANSWER : ?
YOUR ANSWER : ?

Efficiency of the combustion of a fuel is judged by the __________ the flue gas.

%of CO₂ in

Temperature of

Colour of

% of O₂in

TRUE ANSWER : ?
YOUR ANSWER : ?

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