FUELS AND COMBUSTION QUIZ

Which of the following is a poisonous fuel gas?

None of these

Blast furnace gas

Natural gas

Coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The shift conversion reaction taking place during water gas manufacture is given by

None of these

C + 2H₂O ⟷ CO₂ + 2H₂

CO + H₂O ⟷ CO₂ + H₂

C + H₂O ⟷ CO + H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be

77

21

29

79

TRUE ANSWER : ?
YOUR ANSWER : ?

Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

300

5000

2000

10000

TRUE ANSWER : ?
YOUR ANSWER : ?

Overfire burning in a furnace is a phenomenon characterised by the

Supply of excess air

Supply of excess fuel

Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal containing high amount of volatile matter will have

High fusion point of its ash

Low adiabatic flame temperature

Very little ash content

Low ignition temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Preheating of a gaseous fuel results in increased

Quantity of flue gas

Flame length

Ignition temperature

Flame temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent.

25 and 97

40 and 70

80 and 97

95 and 100

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following has the highest gross calorific value?

Blast furnace gas

Coke oven gas

Oil refinery gas

Carburetted water gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about

25000 kcal/kg

8800 kcal/m³

8800 kcal/kg

Same as that of coal middling

TRUE ANSWER : ?
YOUR ANSWER : ?

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