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Fuels and Combustion

Fuels and Combustion
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.

15 to 25
75
55 to 75
35 to 45

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Fuels and Combustion
Efficiency of the combustion of a fuel is judged by the __________ the flue gas.

Colour of
%of CO₂ in
Temperature of
% of O₂in

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Fuels and Combustion
Coke made in narrower by-product coke ovens (as compared to wider ovens) is

All of these
Smaller in size
Less reactive
Stronger

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

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

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Fuels and Combustion
Main constituents of benzol are

Benzene, toluene & xylene
Tar & creosote
Anthracene & phenol
Ammonia & phenol

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Fuels and Combustion
Soft coke is not

Used in blast furnaces
A domestic fuel
None of these
Produced by low temperature carbonisation of coal

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