Adiabatic flame temperature of a fuel is dependent on the initial temperature of___________________?

Related Mcqs:

1. 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

2. 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.

3. 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

4. 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

5. 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

6. 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

7. The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always___________________?

   A. 1
   B. < 1
   C. > 1
   D. Unpredictable

8. 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

9. With increase in calorific value of fuels, their adiabatic flame temperatures__________________?

   A. Increase
   B. Decrease
   C. Remain unchanged
   D. May increase or decrease; depends on the quantity of products of combustion

10. 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