Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Fuels and Combustion
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Too much air for combustion

Pulverised coal in boilers

Less air for combustion

Correct amount of air for combustion

Too much air for combustion

Pulverised coal in boilers

Less air for combustion

Correct amount of air for combustion

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Fuels and Combustion
Undercharging of coal in the by-product coke ovens results in

Increase in the c.v. of coke oven gas

Decrease in the c.v. of coke oven gas

Increase in its throughput

No change in the c.v. of coke oven gas

Increase in the c.v. of coke oven gas

Decrease in the c.v. of coke oven gas

Increase in its throughput

No change in the c.v. of coke oven gas

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Fuels and Combustion
Octane number of 2, 2, 4 - trimethyl pen-tane is

In between 0 and 100

More than 100

100

In between 0 and 100

More than 100

100

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Fuels and Combustion
A good quality coal should have

High ash content

Low fusion point of ash

None of these

High sulphur

High ash content

Low fusion point of ash

None of these

High sulphur

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Fuels and Combustion
Caking coal is desirable for

Coke making

All of these

Burning on travelling grate

Burning on firebars

Coke making

All of these

Burning on travelling grate

Burning on firebars

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

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

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

All of these

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

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

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

All of these

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

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Fuels and Combustion

Fuels and Combustion Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Fuels and Combustion Undercharging of coal in the by-product coke ovens results in

Fuels and Combustion Octane number of 2, 2, 4 - trimethyl pen-tane is

Fuels and Combustion A good quality coal should have

Fuels and Combustion Caking coal is desirable for

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

Fuels and Combustion
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

Fuels and Combustion
Undercharging of coal in the by-product coke ovens results in

Fuels and Combustion
Octane number of 2, 2, 4 - trimethyl pen-tane is

Fuels and Combustion
A good quality coal should have

Fuels and Combustion
Caking coal is desirable for

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