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

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. A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?

   A. More
   B. Less
   C. Same
   D. Data insufficient; can’t be predicted

4. Gross calorific value will be equal to the net calorific value for __________________?

   A. H2
   B. C2H2
   C. CO
   D. C2H6

5. The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be___________________?

   A. y
   B. 0.95 y
   C. 1.05 y
   D. 1.8 y

6. Bomb calorimeter is used to determine the (where, GCV – Gross Calorific Value. NCV – Net Calorific Value.) ?

   A. GCV at constant pressure
   B. GCV at constant volume
   C. NCV at constant pressure
   D. NCV at constant volume

7. Net calorific value is the gross calorific value less the _______________ heat of water in the product of combustion when cooled to 15°C ?

   A. Sensible
   B. Latent
   C. Sensible and latent
   D. None of these

8. Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3) ?

   A. Producer gas
   B. Carburetted water gas
   C. Natural gas
   D. Liquefied petroleum gas

9. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of_________________?

   A. Pitch
   B. Fuel oil
   C. Blast furnace gas
   D. Bituminous coal

10. Out of the following fuels, the difference between gross and net calorific value will be minimum in case of___________________?

    A. Coke oven gas
    B. Water gas
    C. Natural gas
    D. Blast furnace gas