FUELS AND COMBUSTION QUIZ

Yield of pitch from distillation of high temperature tar is around __________ percent.

25

65

10

90

TRUE ANSWER : ?
YOUR ANSWER : ?

Gray King Assay and Swelling Index of a coal is a measure of its

Swelling characteristics

Abradability

Agglutinating properties

Resistance to impact breakage

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most poisonous gas?

L.D. converter gas

Blast furnace gas

Coke oven gas

Producer gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Main use of soft coke is as __________ fuel.

None of these

Foundary

Blastfurnace

Domestic

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is called "blue gas"?

Natural gas

Water gas

Coke oven gas

Producer gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Grindability index of a coal is 100. It implies that the

Coal can't be pulverised

Coal can be easily pulverised

Coal can be pulverised with great difficulty

Power consumption in grinding the coal will be very high

TRUE ANSWER : ?
YOUR ANSWER : ?

'Fat' coal means a coal having

Low calorific value

Low ash content

Non smoking tendency

High volatile matter

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following petrographic constituents of coal is non-coking?

Fussain

Clarain

Vitrain

Durain

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature carbonisation of coal produces

Soft coke

No by-products

Very low calorific value coke oven gas

Metallurgical coke

TRUE ANSWER : ?
YOUR ANSWER : ?

High sulphur content in a fuel __________ of the flue gases.

Both B & C

Decreases the dew point

Reduces the combustion efficiency by limiting the permissible temperature reduction

Increases the dew point

TRUE ANSWER : ?
YOUR ANSWER : ?

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