A. 9 : 1
B. 17 : 1
C. 23 : 1
D. 29 : 1
Related Mcqs:
- Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________?
A. 9.5 : 1
B. 12.5 : 1
C. 15.5 : 1
D. 18.5 : 1 - 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 - Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ?
A. 0.5
B. 1
C. 1/3
D. 2.5 - ______________ the exhaust gas is an indication of the incomplete combustion of fuel?
A. Low temperature of
B. High temperature of
C. High % of CO in
D. High % of CO2 in - The excess air required for the combustion of pulverized coal is of the order of about _______________ percent ?
A. 5
B. 15
C. 30
D. 45 - Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?
A. √T
B. 1/√P
C. √y
D. 1/√ρ - Rain drops falling through atmospheric air attain limited terminal velocity, because of ____________________?
A. Upward thrust due to air
B. Viscous force exerted by air
C. Surface tension effects of water
D. Force of gravity - With increase in compression ratio, the volumetric efficiency of air compressor____________________?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease (depends on the suction pressure) - Air-petrol ratio in an automotive petrol engine is around ________________?
A. 14 : 1
B. 22 : 1
C. 25 : 1
D. 4 : 1 - The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?
A. 159
B. 1837
C. 2537
D. 10000
