A. 2
B. 4
C. 6
D. 1
Related Mcqs:
- 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 - About _____________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?
A. 2
B. 3
C. 4
D. 5 - One kg of carbon for theoretically complete combustion requires ______________ kg of air?
A. 11.5
B. 0.5
C. 23
D. 12 - 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 - 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 - 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 - 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 - 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 - 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 - 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.
