100
500
1000
1500
✅ The correct answer is option B.
Fuel and Combustion MCQs
Yield of charcoal in high temperature carbonisation of wood is about __________ percent.
10
25
50
75
✅ The correct answer is option B.
In low temperature carbonisation of coal, the
Yield of coke oven gas is 290 Nm³ /ton dry coal
Volatile matter in coke is zero
Temperature maintained is 700°C
Yield of tar is about 3% of dry coal
✅ The correct answer is option C.
Which of the following fuels is the best for burning on chain grate stoker?
Non-caking coal
Caking coal
Coking coal
Pulverised coal
✅ The correct answer is option A.
Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?
Producer gas
Carburetted water gas
Natural gas
Liquified petroleum gas
✅ The correct answer is option D.
A particular coal is said to be free burning when it
Burns completely
Gives smokeless burning
Shows little or no fusing action
None of these
✅ The correct answer is option C.
The difference between total carbon and fixed carbon of coal will be minimum in case of
Lignite
Bituminous coal
Anthracite
High temperature coke (V.M < 0.5%)
✅ The correct answer is option D.
A coal containing high amount of volatile matter will have
Low ignition temperature
Very little ash content
High fusion point of its ash
Low adiabatic flame temperature
✅ The correct answer is option A.
Oxygen required for theoretically complete combustion of 1 Nm³ methane is __________ Nm³.
2
4
6
1
✅ The correct answer is option A.
Bunsen burner is an example of a/an __________ burner.
Inside mixing/premix type
Outside mixing/diffusion flame/nozzle mix type
Rotary cup
Submerged combustion
✅ The correct answer is option A.