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

Related Mcqs:

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

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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. Air/gas ratio for complete combustion will be the highest for__________________?

   A. LPG
   B. Gobar gas
   C. Coke oven gas
   D. Carburetted water gas

9. Which of the following would require maximum amount of % excess air for complete combustion ?

   A. Coke oven gas
   B. Furnace oil
   C. Pulverised coal
   D. Lump coal (fixed on chain grate)

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

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