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Fuels and Combustion

Which of the following is a single stage, fixed bed high pressure coal gasification process ?

August 26, 2021March 8, 2019 by admin
Which of the following is a single stage, fixed bed high pressure coal gasification process ?

A. Winkler process
B. Kopper-Totzek process
C. Lurgi Process
D. None of these

Categories Fuels and Combustion

Blast furnace gas constitutes mainly of_________________?

August 26, 2021March 8, 2019 by admin
Blast furnace gas constitutes mainly of_________________?

A. N2 & CH4
B. N2 & H2
C. N2 & CO
D. CH4 & CO2

Categories Fuels and Combustion

Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO2, 20%CO and 10%O2. The percent excess oxygen used is __________________?

August 26, 2021March 8, 2019 by admin
Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO2, 20%CO and 10%O2. The percent excess oxygen used is __________________?

A. 20
B. 12.5
C. 0
D. 10

Categories Fuels and Combustion

Washing of coal does not reduce its______________________?

August 26, 2021March 8, 2019 by admin
Washing of coal does not reduce its______________________?

A. S & P content
B. Heating value
C. Fusion point of ash
D. None of these

Categories Fuels and Combustion

Preheating of coal charge for the coke ovens reduces the __________________?

August 26, 2021March 8, 2019 by admin
Preheating of coal charge for the coke ovens reduces the __________________?

A. Time of carbonisation
B. Yield of gas and tar
C. Fuel consumption in coking
D. All A., B. and C.

Categories Fuels and Combustion

Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3) ?

August 26, 2021March 8, 2019 by admin
Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3) ?

A. Producer gas
B. Carburetted water gas
C. Natural gas
D. Liquefied petroleum gas

Categories Fuels and Combustion

Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?

August 26, 2021March 8, 2019 by admin
Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?

A. Facilitate easy discharging of coke as it swells during carbonisation
B. Facilitate uniform heating of the oven
C. Increase the output of the coke
D. None of these

Categories Fuels and Combustion

Natural draught produced by a chimney depends upon the _____________________?

August 26, 2021March 8, 2019 by admin
Natural draught produced by a chimney depends upon the _____________________?

A. Density of the chimney gases
B. Height of the chimney
C. Both A. and B.
D. Neither A. nor B.

Categories Fuels and Combustion

Highly reactive coke have lower ___________________?

August 26, 2021March 8, 2019 by admin
Highly reactive coke have lower ___________________?

A. Porosity
B. Coke reactivity index (CRI)
C. Critical air blast (CAB) value
D. Both B. and C.

Categories Fuels and Combustion

_____________ prohibits the use of alcohols directly in petrol engines ?

August 26, 2021March 8, 2019 by admin
_____________ prohibits the use of alcohols directly in petrol engines ?

A. Low octane number
B. High cost & availability
C. Low flash point
D. Low calorific value

Categories Fuels and Combustion
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