A. 50
B. 1000
C. 5000
D. 10000
Related Mcqs:
- A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?
A. More
B. Less
C. Same
D. Data insufficient; can’t be predicted - A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the_________________?
A. Presence of large quantity of hydrogen in the fuel
B. Low calorific value of the fuel
C. High sulphur content in the fuel
D. Lack of thorough mixing of fuel with air - Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300°) may be reduced by about ______________ percent as compared to the use of atmospheric combustion air?
A. 5
B. 10
C. 20
D. 35 - In flue gas analysis by Orsat’s apparatus, carbon monoxide is absorbed by__________________?
A. Cuprous chloride
B. Potassium hydroxide
C. Alkaline pyrogallol solution
D. None of these - Percentage of carbon monoxide in blast furnace gas may be around ____________________ ?
A. 8
B. 14
C. 22
D. 52 - Volumetric ratio of N2 to O2 in dry atmospheric air is ______________?
A. 0.21
B. 3.76
C. 4.76
D. 0.79 - Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?
A. 71%
C. In between 37 & 71%
D. None of these - Dry air required to burn 1 kg of carbon completely may be around ______________ kg?
A. 11
B. 2
C. 20
D. 38 - One kg of carbon for theoretically complete combustion requires ______________ kg of air?
A. 11.5
B. 0.5
C. 23
D. 12 - The difference between total carbon and fixed carbon of coal will be minimum in case of___________________?
A. Lignite
B. Bituminous coal
C. Anthracite
D. High temperature coke (V.M < 0.5%)
