A. Decreases
B. Increases
C. Remain constant
D. May increase or decrease, depends on combustibles
Related Mcqs:
- 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 - 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 - Calorific value of blast furnace gas is around _____________ KCal/Nm3?
A. 850
B. 1800
C. 4200
D. 6500 - The calorific value of producer gas is around _____________ kcal/Nm3?
A. 1300
B. 500
C. 4500
D. 9000 - 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 - 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 - Oxygen required for theoretically complete combustion of 1 Nm3 methane is ______________ Nm3?
A. 2
B. 4
C. 6
D. 1 - 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 - The calorific value of ‘LPG’ (50% propane + 50% butane) is about ______________ kcal/Nm3?
A. 5000
B. 25,000
C. 10,000
D. 15,000 - 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
