Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________

Byadmin March 7, 2019August 26, 2021

Coal is pulverised before burning in large capacity boiler furnaces mainly to____________________

A. Ensure its complete combustion
B. Facilitate easy ash removal
C. Enhance its calorific value
D. Provide trouble free operation

Fuels and Combustion

A particular coal is said to be free burning when it __________________?

A particular coal is said to be free burning when it __________________?

A. Burns completely
B. Gives smokeless burning
C. Shows little or no fusing action
D. None of these

Read More A particular coal is said to be free burning when it __________________?
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 _________________?

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 _________________?

A. Is less liable to spontaneous combustion on storage
B. Is more difficult to ignite and produces a shorter flame
C. Requires smaller combustion space and less secondary air
D. None of these

Read More 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 _________________?
CHEMICAL ENGINEERING | Fuels and Combustion

Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has

Question: Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has
[A].

higher calorific value.
[B].
lower hydrogen content.
[C].
both (a) and (b).
[D].
neither (a) nor (b).

Answer: Option D

Explanation:

No answer description available for this question.

Read More Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has
CHEMICAL ENGINEERING | Fuels and Combustion

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

Question: Assam coals suffers mainly from the disadvantage of high __________ content.
[A].

ash
[B].
volatile matter
[C].
sulphur (4-6%)
[D].
moisture

Answer: Option C

Explanation:

No answer description available for this question.

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

A good coking coal should have high ______________ content?

A good coking coal should have high ______________ content?

A. Ash
B. Sulphur & phosphorus
C. Moisture
D. None of these

Read More A good coking coal should have high ______________ content?
Fuels and Combustion

Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

A. 71%
C. In between 37 & 71%
D. None of these

Read More Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

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