C.V. (kcal/Nm3) of gaseous fuels _____________ with increase in molecular weight?

Related Mcqs:

1. 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

2. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3), while the C.V. is same on weight basis (i.e., kcal/kg) ?

   A. Propane and acetylene
   B. Propane and LPG
   C. Sewage gas and gobar gas
   D. B.F. gas and coke oven gas

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

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

4. The calorific value of producer gas is around _____________ kcal/Nm3?

   A. 1300
   B. 500
   C. 4500
   D. 9000

5. Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?

   A. Carburetted water gas
   B. Blast furnace gas
   C. Natural gas
   D. Producers’ gas

6. Dust content in raw blast furnace gas is about _______________ gm/Nm3; hence it is cleaned to the dust level of about < 10 mg /Nm3 before use?

   A. 15-30
   B. 1-2
   C. 70-100
   D. 150-200

7. Oxygen required for theoretically complete combustion of 1 Nm3 methane is ______________ Nm3?

   A. 2
   B. 4
   C. 6
   D. 1

8. Dry air requirement for burning 1 Nm3 of CO to CO2 may be around _______________ Nm3 ?

   A. 2.4
   B. 1.75
   C. 0.87
   D. 11.4

9. The calorific value of ‘LPG’ (50% propane + 50% butane) is about ______________ kcal/Nm3?

   A. 5000
   B. 25,000
   C. 10,000
   D. 15,000

10. Which of the following has the least calorific value (kcal/Nm3) ?

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