Chemical Engineering - Fuels and Combustion

6. 

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

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

Answer: Option B

Explanation:

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7. 

A sooty flame can be made non-luminous by

A. admitting more gas.
B. shutting gas supply.
C. admitting more air.
D. shutting air supply.

Answer: Option C

Explanation:

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8. 

A coal that softens and fuses on heating is

A. classified
B. carbonised
C. caking
D. non-caking

Answer: Option C

Explanation:

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9. 

Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction ?

A. 2CO C + CO2
B. CO + H2O CO2 + H2
C. C + H2O CO + H2
D. C + 2H2O CO2 + 2H2

Answer: Option A

Explanation:

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10. 

'Mixed gas' used in steel plants is a mixture of

A. B.F. gas and coke oven gas.
B. coke oven gas and converter gas.
C. coke oven gas and L.P.G.
D. blast furnace gas and naphtha vapor.

Answer: Option A

Explanation:

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