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
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

5 to 15

20 to 40

3 to 4

1 to 2

5 to 15

20 to 40

3 to 4

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Fuels and Combustion
The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.

Slow & high

Slow & low

Fast & high

Fast & slow

Slow & high

Slow & low

Fast & high

Fast & slow

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Fuels and Combustion
Low temperature oxidation of coal is accelerated by the

All of these

Absence of porous or friable particles

Storage in compressed piles

Storage in large heaps

All of these

Absence of porous or friable particles

Storage in compressed piles

Storage in large heaps

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Fuels and Combustion
Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the

Risk of explosion

Incomplete combustion of coal

Chances of clinker formation

Requirement of large volume combustion chamber

Risk of explosion

Incomplete combustion of coal

Chances of clinker formation

Requirement of large volume combustion chamber

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Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

Prevention of clinker formation in the oven

Controlling the dust nuisance while charging the coal

All of these

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

Prevention of clinker formation in the oven

Controlling the dust nuisance while charging the coal

All of these

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

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Fuels and Combustion
(64-132) rank coal (ASTM) means a coal with 64%

Fixed carbon and having a heat value of 13, 200 BTU/1b

Ash and a heating value of 13, 200 BTU/1b

None of these

Fixed carbon and a heating value of 132 BTU/1b

Fixed carbon and having a heat value of 13, 200 BTU/1b

Ash and a heating value of 13, 200 BTU/1b

None of these

Fixed carbon and a heating value of 132 BTU/1b

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Fuels and Combustion

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 The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.

Fuels and Combustion Low temperature oxidation of coal is accelerated by the

Fuels and Combustion Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the

Fuels and Combustion Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion (64-132) rank coal (ASTM) means a coal with 64%

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
The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.

Fuels and Combustion
Low temperature oxidation of coal is accelerated by the

Fuels and Combustion
Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the

Fuels and Combustion
Sometimes water is sprayed during coal charging in the coke oven, which helps in

Fuels and Combustion
(64-132) rank coal (ASTM) means a coal with 64%