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Fuels and Combustion

Fuels and Combustion
Which of the following fuels is the best for burning on chain grate stoker?

Coking coal
Non-caking coal
Caking coal
Pulverised coal

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Fuels and Combustion
A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms.

1 to 2
20 to 40
3 to 4
5 to 15

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Fuels and Combustion
Gobar gas constitutes mainly of

CH₄ & N₂
CO & CO₂
CO & N₂
CH₄ & CO₂

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Fuels and Combustion
Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around __________ percent.

40
20
4
96

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Fuels and Combustion
Which of the following constituents of coal is the most important in the production of coke?

Volatiles
Moisture
Ash
Carbon

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Fuels and Combustion
Which of the following is not a product of tar distillation?

None of these
Phenol & naphthalene
Anthracene & creosote
Benzol & pitch

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