A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

Fuels and Combustion
A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

Higher methane content and thus higher calorific value

None of these

Higher carbon monoxide content

Lower carbon dioxide content

Higher methane content and thus higher calorific value

None of these

Higher carbon monoxide content

Lower carbon dioxide content

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

CO

H₂

CH₄

C₂H₆

CO

H₂

CH₄

C₂H₆

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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.

20 to 40

5 to 15

3 to 4

1 to 2

20 to 40

5 to 15

3 to 4

1 to 2

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Fuels and Combustion
Anthracite can be used for

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

All of these

Recarbonising steel

Making carbon electrodes

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

All of these

Recarbonising steel

Making carbon electrodes

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Fuels and Combustion
Use of excess of combustion air in the combustion of fuels results in

Long flame

None of these

Condensation of water vapour from the fuel gas

Heat losses

Long flame

None of these

Condensation of water vapour from the fuel gas

Heat losses

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Fuels and Combustion
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.

10 & 3

10 & 20

3 & 10

15 & 8

10 & 3

10 & 20

3 & 10

15 & 8

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Fuels and Combustion

Fuels and Combustion A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

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

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.

Fuels and Combustion Anthracite can be used for

Fuels and Combustion Use of excess of combustion air in the combustion of fuels results in

Fuels and Combustion Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.

Fuels and Combustion
A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

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

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.

Fuels and Combustion
Anthracite can be used for

Fuels and Combustion
Use of excess of combustion air in the combustion of fuels results in

Fuels and Combustion
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.