Related Questions

Short/intense flame is produced during combustion of gaseous fuel by using
A High amount/current of combustion air
B Low amount/current of combustion air
C Preheated secondary air
D Very little excess air
Deficiency of combustion air during combustion of a gaseous fuel
A Lengthens the flame
B Causes heat loss of fuel by its partial combustion
C Both A & B
D Shortens the flame
If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be
A Low
B High
C Very high, if the fuel is of low calorific value
D None of these
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
A Increase
B Decrease
C Increase or decrease depending on the fuel type
D Not change
__________ the exhaust gas is an indication of the incomplete combustion of fuel.
A Low temperature of
B High temperature of
C High % of CO in
D High % of CO2 in
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.
A Sulphur
B Oxygen
C Hydrogen
D Carbon
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
A 400-500
B 900-1000
C 1400-1500
D 1700-1800
Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in
A Air
B Oxygen
C Either A or B
D Either A or C without gain or loss of heat
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
A Uranium oxide
B Uranium hexaflouride
C Uranium carbide
D Uranium sulphate
During combustion of gaseous fuels, deficiency of air
A does not affect the flame length
B increases the flame temperature
C tends to shorten the flame
D lengthens the flame

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