FUELS AND COMBUSTION QUIZ

Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of

BaSO₄ & NaCl

MgO & Na₂CO₃

MgCO₃ & NaCl

MgSO₄ & BaCl₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has

Both A & B

Neither A nor B

Higher calorific value

Lower hydrogen content

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a single stage, fixed bed high pressure coal gasification process?

None of these

Kopper-Totzek process

Winkler process

Lurgi Process

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of natural gas is about __________ kcal/Nm³.

2500

25, 000

35, 000

10, 000

TRUE ANSWER : ?
YOUR ANSWER : ?

If oxygen content in the flue gas rises too high, fuel is being wasted by

None of these

Dry gas/stack gas loss

Moisture loss

Incomplete combustion

TRUE ANSWER : ?
YOUR ANSWER : ?

During coking of coal, the ash content (percentage)

Remains constant

Decreases

None of these

Increases

TRUE ANSWER : ?
YOUR ANSWER : ?

'Fuel' can be defined as a substance which produces heat by

Nuclear fission

All of these

Combustion

Nuclear fusion

TRUE ANSWER : ?
YOUR ANSWER : ?

In low temperature carbonisation of coal, the

Volatile matter in coke is zero

Temperature maintained is 700°C

Yield of tar is about 3% of dry coal

Yield of coke oven gas is 290 Nm³ /ton dry coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?

100

70

50

85

TRUE ANSWER : ?
YOUR ANSWER : ?

Soft coke is not

Produced by low temperature carbonisation of coal

Used in blast furnaces

None of these

A domestic fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

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