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Fuels and Combustion

Fuels and Combustion
Coking time in narrow by-product coke ovens is around __________ hours.

80
8
18
48

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Fuels and Combustion
Which of the following fuels is generally not used in thermal power plant boiler firing?

Pulverised coking coal
Coal middling from washeries
F. gas, coke oven gas and L.D. converter gas
Furnace oil, light diesel oil and tar/PCM

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Fuels and Combustion
With increase in C/H ratio of a fuel, the amount of CO₂ formed on its complete combustion

Decreases
Increases
Either A or B, depends on other factors
Remains same

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Fuels and Combustion
Which of the following is not a by-product fuel?

Pitch
Petrol
Blast furnace gas
Refinery gas

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Fuels and Combustion
C.V. (kcal/Nm³) of gaseous fuels __________ with increase in molecular weight.

May increase or decrease, depends on combustibles
Increases
Decreases
Remains constant

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Fuels and Combustion
Calorific value of coke oven gas is around __________ Kcal/Nm³.

4200
7500
900
2000

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