Fuels and Combustion

Which of the following fuel gases has the highest calorific value ?

Byadmin March 7, 2019August 26, 2021

Which of the following fuel gases has the highest calorific value ?

A. Natural gas
B. Coal bed methane (CBM)
C. Liquefied petroleum gas (LPG)
D. Sewage gas

Fuels and Combustion

Mineral matter content (M) and ash content A. in coal are approximately related as _______________?

Mineral matter content (M) and ash content A. in coal are approximately related as _______________?

A. M = 1.1A
B. M = A
C. M = 1.5A
D. M = 2A

Read More Mineral matter content (M) and ash content A. in coal are approximately related as _______________?
Fuels and Combustion

The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be_________________?

The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be_________________?

A. 21
B. 77
C. 79
D. 29

Read More The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be_________________?
CHEMICAL ENGINEERING | Fuels and Combustion

Froth floatation is used for

Question: Froth floatation is used for
[A].

washing fine coal dust (< 0.5 mm size).
[B].
washing lump coal (> 80 mm size).
[C].
removing ash from the coal based on difference in specific gravity of coal and ash.
[D].
all (a), (b)and(c).

Answer: Option A

Explanation:

No answer description available for this question.

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Fuels and Combustion

Calorific value of tar is about _____________ Kcal/kg?

Calorific value of tar is about _____________ Kcal/kg?

A. 8800
B. 12000
C. 14000
D. 16000

Read More Calorific value of tar is about _____________ Kcal/kg?
CHEMICAL ENGINEERING | Fuels and Combustion

Coke having higher porosity has

Question: Coke having higher porosity has
[A].

lower bulk density.
[B].
lower strength.
[C].
higher reactivity.
[D].
all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Read More Coke having higher porosity has
Fuels and Combustion

The main function of primary air in pulverised coal fired burner is to_________________?

The main function of primary air in pulverised coal fired burner is to_________________?

A. Burn CO to CO2
B. Dry and transport the coal
C. Have proper combustion by supplying it around the burner
D. Preheat the tertiary air used for complete combustion of CO to CO2

Read More The main function of primary air in pulverised coal fired burner is to_________________?

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