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Fuels and Combustion

Fuels and Combustion
Which of the following coke has the least percentage of ash?

Foundary coke
Metallurgical coke
Beehive coke
Petroleum coke

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Fuels and Combustion
Bulk density of pulverised coal may be about __________ kg/m³.

1500
100
500
1000

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Fuels and Combustion
Width of the coke oven towards coke side is slightly more than that on pusher side to

Increase the output of the coke
Facilitate easy discharging of coke as it swells during carbonisation
None of these
Facilitate uniform heating of the oven

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Fuels and Combustion
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

Carbon
Hydrogen
Sulphur
Oxygen

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Fuels and Combustion
A coal containing high amount of volatile matter will have

High fusion point of its ash
Low ignition temperature
Low adiabatic flame temperature
Very little ash content

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Fuels and Combustion
Which of the following is a rich fuel gas?

Producer gas
Refinery gases
None of these
Coal gas from underground gasification of coal

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