Fixed carbon and having a heating value around 13, 200 BTU/1b
Ash and heating value around 13, 200 BTU/1b
Fixed carbon and heating value around 132 BTU/1b
None of these
✅ The correct answer is option A.
Engineering
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3012. Low temperature oxidation of coal resulting from bad storage conditions does not decrease its
Caking power
Calorific value
Hydrogen content
Oxygen content
✅ The correct answer is option D.
3013. Coalification means the
Process of conversion of lignite into anthracite
Underground gasification of coal
Complete combustion of coal
Direct hydrogenation of coal
✅ The correct answer is option A.
3014. Which of the following will generate maximum volume of product of complete combustion (Nm³/Nm³ of fuel) ?
Carburetted water gas
Blast furnace gas
Natural gas
Producers
✅ The correct answer is option C.
3015. __________ is used as jet engine fuel.
Petrol
Diesel
Kerosene
LPG
✅ The correct answer is option C.
3016. The heat of combustion of a fuel
Is equal to the heat of formation
Is always negative
Can’t be known without calculating it
Is always positive
✅ The correct answer is option B.
3017. ‘Mixed gas’ used in steel plants is a mixture of
B.F. gas and coke oven gas
Coke oven gas and converter gas
Coke oven gas and L.P.G
Blast furnace gas and naphtha vapor
✅ The correct answer is option A.
3018. Coke compared to the coal from which it has been made, contains
Less volatile matter
More carbon
Greater percentage of ash
All of the above
✅ The correct answer is option D.
3019. Purity of coke means that, it is high in carbon and low in
Volatiles
Ash
Iron
Moisture
✅ The correct answer is option A.
3020. 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.
< 37%
>71%
In between 37 & 71%
None of these
✅ The correct answer is option C.