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

Related Mcqs:

1. 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

2. About _____________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?

   A. 2
   B. 3
   C. 4
   D. 5

3. One kg of carbon for theoretically complete combustion requires ______________ kg of air?

   A. 11.5
   B. 0.5
   C. 23
   D. 12

4. 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

5. 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

6. Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?

   A. Blast furnace gas
   B. Natural gas
   C. Producer gas
   D. Water gas

7. Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around ______________ percent?

   A. 4
   B. 96
   C. 20
   D. 40

8. Use of excess of combustion air in the combustion of fuels results in__________________?

   A. Heat losses
   B. Long flame
   C. Condensation of water vapour from the fuel gas
   D. None of these

9. Deficiency of combustion air during combustion of a gaseous fuel_____________________?

   A. Lengthens the flame
   B. Causes heat loss of fuel by its partial combustion
   C. Both A. & B.
   D. Shortens the flame

10. Stoichiometric combustion of 12 kg of carbon requires _____________ of oxygen?

    A. 1kg mole
    B. 22.4 Nm3
    C. 32 kg
    D. All A., B. and C.