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

Related Mcqs:

1. 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

2. 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

3. 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

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

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

5. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?

   A. 30
   B. 300
   C. 3,000
   D. 30,000

6. Yield of coke oven gas in low temperature carbonisation of coal is about ______________ Nm3 /ton of dry coal?

   A. 60
   B. 160
   C. 500
   D. 750

7. 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

8. As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion _______________ for the same percentage of excess air?

   A. Decreases
   B. Increases
   C. Remain same
   D. May increase or decrease depending on the type of fuel

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

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

10. 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