Fuels and Combustion

Use of preheated air for combustion of fuel in the furnace, increases the___________________?

Byadmin March 7, 2019August 26, 2021

Use of preheated air for combustion of fuel in the furnace, increases the___________________?

A. Scale losses of the furnace stock
B. Calorific value of the fuel
C. Flame temperature
D. None of these

CHEMICAL ENGINEERING | Fuels and Combustion

Carbon Content by weight in air dried wood may be about __________ percent.

Question: Carbon Content by weight in air dried wood may be about __________ percent.
[A].

10
[B].
25
[C].
50
[D].
80

Answer: Option C

Explanation:

No answer description available for this question.

Read More Carbon Content by weight in air dried wood may be about __________ percent.
Fuels and Combustion

Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ?

Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ?

A. Sensible
B. Latent
C. Sensible and latent
D. None of these

Read More Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ?
CHEMICAL ENGINEERING | Fuels and Combustion

Caking index of a coal is a measure of its

Question: Caking index of a coal is a measure of its
[A].

abradability
[B].
reactivity
[C].
agglutinating (binding) properties
[D].
porosity

Answer: Option C

Explanation:

No answer description available for this question.

Read More Caking index of a coal is a measure of its
Fuels and Combustion

In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing________________?

In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing________________?

A. CO
B. CO2
C. O2
D. H2O

Read More In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing________________?
Fuels and Combustion

Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________________?

Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________________?

A. The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
B. It reduces its calorific value tremendously
C. It reduces its flame temperature tremendously
D. There are chances of explosion during preheating

Read More Fuel gases containing hydrocarbons (e.g. coke oven gas) are not preheated before burning, mainly because __________________?
CHEMICAL ENGINEERING | Fuels and Combustion

The advantage of firing pulverised coal in the furnace lies in the fact, that it

Question: The advantage of firing pulverised coal in the furnace lies in the fact, that it
[A].

permits the use of high ash content coal.
[B].
permits the use of low fusion point ash coal.
[C].
accelerates the burning rate and economises on fuel combustion.
[D].
all (a), (b) and (c).

Answer: Option C

Explanation:

No answer description available for this question.

Read More The advantage of firing pulverised coal in the furnace lies in the fact, that it

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