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.Management Sciences
Category: Fuels and Combustion
The maximum adiabatic flame temperature is attained, when the fuel is burnt with ______________________?
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A. Theoretically required amount of air
B. More than theoretically required amount of air
C. Less than theoretically required amount of air
D. Theoretically required amount of oxygen
When the coal is heated in absence of air, it is called its ________________?
A. Deoxidation
B. Gasification
C. Coalification
D. Carbonisation
Abel apparatus is used for those oils, whose flash points are ___________°F?
A. < 120
B. > 120
C. > 280
D. 300-600
_____________ has the widest inflammability limit (explosion limit) of all the gases?
A. Hydrogen
B. Carbon monoxide
C. Acetylene
D. Methane
Pensky-Marten apparatus is used for those oils, whose flash points are _____________ °F?
A. < 120
B. > 120
C. < 90
D. 90-110
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively ______________ percent?
A. 3 & 10
B. 10 & 3
C. 10 & 20
D. 15 & 8
Calorific value of both the solid & liquid fuels can be determined by using ______________ calorimeter?
A. Junker’s
B. Bomb
C. Boy’s
D. None of these
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its ___________________?
A. Emissivity factor is higher
B. Sulphur content is lower
C. Flue gas has lower dew point thereby facilitating more waste heat recovery
D. All A., B. and C.
Dry air required to burn 1 kg of carbon completely may be around ______________ kg?
A. 11
B. 2
C. 20
D. 38
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