A. The gaseous fuel before combustion decreases
B. Combustion air decreases
C. Either the fuel or the air or both, increases
D. Either the fuel or the air does not affect
Related Mcqs:
- The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?
A. Lower than
B. Higher than
C. Same as
D. Not related to - Actual flame temperature is always lower than the adiabatic flame temperature, because there is________________?
A. No possibility of obtaining complete combustion at high temperature
B. Always loss of heat from the flame
C. Both A. and B.
D. Neither A. nor B. - 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 B. without gain or loss of heat - Adiabatic flame temperature of a fuel is dependent on the initial temperature of___________________?
A. Fuel
B. Air
C. Both A. & B.
D. Neither A. nor B. - Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is_________________?
A. 200 °F
B. 200 °C
C. 200 °K
D. 200 °R - The maximum adiabatic flame temperature is attained, when the fuel is burnt with ______________________?
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 - The maximum adiabatic flame temperature in air as compared to that in pure oxygen is_______________?
A. Much lower
B. Much higher
C. Same
D. Either lower or higher, depends on the type of fuel - The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always___________________?
A. 1
B. < 1
C. > 1
D. Unpredictable - 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
