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___________________?

Related Mcqs:

1. Calorific value of gobar gas (containing CH4 = 60% , H2 = 10% ; CO2 = 30%) may be about ______________ Kcal/Nm3?

   A. 1,800
   B. 3,200
   C. 5,400
   D. 10,200

2. The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be___________________?

   A. 27.6
   B. 23
   C. 47.3
   D. 42.9

3. A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is_________________?

   A. CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60
   B. CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02
   C. CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2:72.06
   D. CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74

4. 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

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

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

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. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

   A. 71%
   C. In between 37 & 71%
   D. None of these

9. Calorific value of blast furnace gas is around _____________ KCal/Nm3?

   A. 850
   B. 1800
   C. 4200
   D. 6500

10. The calorific value of L.D. converter gas is about ____________ Kcal/Nm3?

    A. 1800
    B. 800
    C. 4500
    D. 10000