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Fuels and Combustion

Fuels and Combustion
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

10000
5000
50
1000

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Fuels and Combustion
High temperature in gasification of coal favours

High production of CO
Low production of CO₂
High production of CO₂
Both B and C

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Fuels and Combustion
'Fat' coal means a coal having

Low calorific value
Low ash content
Non smoking tendency
High volatile matter

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Fuels and Combustion
L.D. converter gas (produced in steel plant) comprises mainly of

CO₂ & O₂
CO (upto 65%) & CO₂
CO₂ & H₂
CO & O₂

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

65
90
10
25

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

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

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