FUELS AND COMBUSTION QUIZ

Combustion reaction of fuels is a/an __________ reaction.

Auto catalytic

None of these

Endothermic

Exothermic

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a lean fuel gas?

Coke oven gas

Natural gas

LPG

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a micro component present in coal?

Micrinite

Fusinite

Liptinite

Clarain

TRUE ANSWER : ?
YOUR ANSWER : ?

Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

85

70

105

145

TRUE ANSWER : ?
YOUR ANSWER : ?

High ash containing coke

Produces more slag when used in the blast furnace

Is desirable in producer gas manufacture

Has poor strength and abrasion resistance

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following has the highest flame speed?

C₂H₆

CO

CH₄

H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by

Potassium hydroxide

Alkaline pyrogallol solution

None of these

Cuprous chloride

TRUE ANSWER : ?
YOUR ANSWER : ?

Natural draft created by the chimney depends upon

Neither A nor B

Its height

Temperature of the flue gas

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

During combustion of gaseous fuels, deficiency of air

Lengthens the flame

Does not affect the flame length

Increases the flame temperature

Tends to shorten the flame

TRUE ANSWER : ?
YOUR ANSWER : ?

Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.)

GCV at constant pressure

NCV at constant pressure

NCV at constant volume

GCV at constant volume

TRUE ANSWER : ?
YOUR ANSWER : ?

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