The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

Fuels and Combustion
The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

None of these

Make it look attractive

Minimise its corrosion

Avoid radiation heat loss

None of these

Make it look attractive

Minimise its corrosion

Avoid radiation heat loss

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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.

5 to 15

3 to 4

1 to 2

20 to 40

5 to 15

3 to 4

1 to 2

20 to 40

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Fuels and Combustion
While the first commercial low temperature coal carbonisation plant is located at Neyveli (in Chennai), the second such plant has been built at

Singreni (AP.)

Dankuni (West Bengal)

Raniganj

Dhanbad

Singreni (AP.)

Dankuni (West Bengal)

Raniganj

Dhanbad

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Fuels and Combustion
A coal with high ash content is undesirable, as

The ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the

It is abrasive to the coal pulveriser (ie.g. ball mill) and the combustion chamber

The ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes

All of these

The ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the

It is abrasive to the coal pulveriser (ie.g. ball mill) and the combustion chamber

The ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes

All of these

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Fuels and Combustion
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

None of these

Is less liable to spontaneous combustion on storage

Is more difficult to ignite and produces a shorter flame

Requires smaller combustion space and less secondary air

None of these

Is less liable to spontaneous combustion on storage

Is more difficult to ignite and produces a shorter flame

Requires smaller combustion space and less secondary air

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Fuels and Combustion
The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called

Burning temperature

Fire point

Kindling temperature

Smoke point

Burning temperature

Fire point

Kindling temperature

Smoke point

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Fuels and Combustion

Fuels and Combustion The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

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 While the first commercial low temperature coal carbonisation plant is located at Neyveli (in Chennai), the second such plant has been built at

Fuels and Combustion A coal with high ash content is undesirable, as

Fuels and Combustion A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

Fuels and Combustion The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called

Fuels and Combustion
The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to

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
While the first commercial low temperature coal carbonisation plant is located at Neyveli (in Chennai), the second such plant has been built at

Fuels and Combustion
A coal with high ash content is undesirable, as

Fuels and Combustion
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

Fuels and Combustion
The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called