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Fuels and Combustion

Undercharging of coal in the by-product coke ovens results in ____________________?

August 26, 2021March 8, 2019 by admin
Undercharging of coal in the by-product coke ovens results in ____________________?

A. Decrease in the c.v. of coke oven gas
B. Increase in its throughput
C. Increase in the c.v. of coke oven gas
D. No change in the c.v. of coke oven gas

Categories Fuels and Combustion

Benzol is used_____________________?

August 26, 2021March 8, 2019 by admin
Benzol is used_____________________?

A. As a motor fuel blend
B. For producing benzene, toluene & xylene by its distillation
C. Both A. & B.
D. Neither A. nor B.

Categories Fuels and Combustion

Pulverised coal used in boiler firing need not have____________________?

August 26, 2021March 8, 2019 by admin
Pulverised coal used in boiler firing need not have____________________?

A. Less moisture content
B. High fusion point of its ash
C. High bulk density
D. Lower ash content

Categories Fuels and Combustion

Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg?

August 26, 2021March 8, 2019 by admin
Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg?

A. 1000
B. 4000
C. 6000
D. 8000

Categories Fuels and Combustion

About _____________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?

August 26, 2021March 8, 2019 by admin
About _____________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?

A. 2
B. 3
C. 4
D. 5

Categories Fuels and Combustion

Fischer-Tropsch method aims at the ______________________?

August 26, 2021March 8, 2019 by admin
Fischer-Tropsch method aims at the ______________________?

A. Gasification of coal
B. Synthesis of gasoline (from water gas)
C. Hydrogenation of coal to produce gasoline
D. None of these

Categories Fuels and Combustion

In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by______________________?

August 26, 2021March 8, 2019 by admin
In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by______________________?

A. Potassium hydroxide
B. Dilute potassium carbonate
C. Cuprous chloride
D. Alkaline pyrogallol solution

Categories 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 ?

August 26, 2021March 8, 2019 by admin
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

Categories Fuels and Combustion

Producer gas comprises mainly of _______________________?

August 26, 2021March 8, 2019 by admin
Producer gas comprises mainly of _______________________?

A. CO & N2
B. CO & H2
C. CO2 & N2
D. CO2 & H2

Categories Fuels and Combustion

Coke compared to the coal from which it has been made, contains ____________________?

August 26, 2021March 8, 2019 by admin
Coke compared to the coal from which it has been made, contains ____________________?

A. Less volatile matter
B. More carbon
C. Greater percentage of ash
D. All A., B. and C.

Categories Fuels and Combustion
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