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Fuels and Combustion

Fuels and Combustion
Assam coals suffers mainly from the disadvantage of high __________ content.

Sulphur (4-6%)
Ash
Volatile matter
Moisture

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Fuels and Combustion
Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces

Higher amount of both methane and hydrogen
Lower amount of hydrogen
Both A & B
Higher amount of methane

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Fuels and Combustion
A coal containing very high percentage of durain is called __________ coal.

Bright
Boghead
Non-banded
Splint

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Fuels and Combustion
Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.

95-100
60-65
25-30
3-5

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Fuels and Combustion
Which of the following has the highest flame velocity?

H₂
CO
C₂H₆
CH₄

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Fuels and Combustion
A good metallurgical coke should have very low

Hardness & strength
Porosity
Sulphur & phosphorous content
Fusion point of its ash

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