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Fuels and Combustion

Presence of free moisture in coal is most disadvantageous during_________________?

August 26, 2021March 7, 2019 by admin
Presence of free moisture in coal is most disadvantageous during_________________?

A. Its pulverisation (as it requires more power)
B. Combustion of fire slacks on the grates
C. Handling (e.g. when emptying wagons)
D. None of these

Categories Fuels and Combustion

Fuel for a nuclear reactor (thermal) is ____________________?

August 26, 2021March 7, 2019 by admin
Fuel for a nuclear reactor (thermal) is ____________________?

A. Uranium
B. Plutonium
C. Radium
D. None of these

Categories Fuels and Combustion

The calorific value of ‘LPG’ (50% propane + 50% butane) is about ______________ kcal/Nm3?

August 26, 2021March 7, 2019 by admin
The calorific value of ‘LPG’ (50% propane + 50% butane) is about ______________ kcal/Nm3?

A. 5000
B. 25,000
C. 10,000
D. 15,000

Categories Fuels and Combustion

With increase in the oxygen content of the coal, its ______________ decreases?

August 26, 2021March 7, 2019 by admin
With increase in the oxygen content of the coal, its ______________ decreases?

A. Calorific value
B. Caking power
C. Both A. & B.
D. Neither A. nor B.

Categories Fuels and Combustion

Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________________?

August 26, 2021March 7, 2019 by admin
Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________________?

A. Calorific value
B. Higher C/H ratio
C. Sulphur content
D. Difference in gross & net calorific value

Categories Fuels and Combustion

Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?

August 26, 2021March 7, 2019 by admin
Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?

A. KOH
B. Ammoniacal cuprous chloride
C. Pyrogallol solution
D. None of these

Categories Fuels and Combustion

Catalyst used in Fischer-Tropsch process is_______________?

August 26, 2021March 7, 2019 by admin
Catalyst used in Fischer-Tropsch process is_______________?

A. Nickel
B. Zinc oxide
C. Alumina
D. Thorium oxide

Categories Fuels and Combustion

Dry air required to burn 1 kg of carbon completely may be around ______________ kg?

August 26, 2021March 7, 2019 by admin
Dry air required to burn 1 kg of carbon completely may be around ______________ kg?

A. 11
B. 2
C. 20
D. 38

Categories Fuels and Combustion

‘Fat coals’ are those coals which have very high____________________?

August 26, 2021March 7, 2019 by admin
‘Fat coals’ are those coals which have very high____________________?

A. Caking capacity
B. Volatile matter content
C. Fusion point of its ash
D. Inherent moisture content

Categories Fuels and Combustion

With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion____________________?

August 26, 2021March 7, 2019 by admin
With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion____________________?

A. Increases
B. Decreases
C. Remain same
D. Either A. or B., depends on other factors

Categories Fuels and Combustion
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