1
7
22
46
✅ The correct answer is option C.
Fuel and Combustion MCQs
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.
1100
1250
1350
1400
✅ The correct answer is option A.
In Lurgi coal gasifier,
Coking coals cannot be used
Low carbon conversion efficiency is achieved
Entrainment of solids is higher
Larger quantity of coal can be processed
✅ The correct answer is option D.
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.
Density
Porosity
Electrical resistivity
None of these
✅ The correct answer is option A.
One kg of carbon for theoretically complete combustion requires __________ kg of air.
11.5
0.5
23
12
✅ The correct answer is option A.
The shift conversion reaction taking place during water gas manufacture is given by
C + H₂O ⟷ CO + H₂
C + 2H₂O ⟷ CO₂ + 2H₂
CO + H₂O ⟷ CO₂ + H₂
None of these
✅ The correct answer is option C.
Insitu theory and drift theory are related to the
Origin of petroleum oil
Origin of coal
Coalification
Variation of coal quality with depth
✅ The correct answer is option B.
A coal with high __________ content, would ignite most easily.
Fixed carbon
Volatile matter
Ash
Oxygen
✅ The correct answer is option B.
Carbon Content by weight in air dried wood may be about __________ percent.
10
25
50
80
✅ The correct answer is option C.
Method of maintaining fires in furnace during standby periods without undue consumption of fuel is called
Back draughting
Banking
Under pressurising
None of these
✅ The correct answer is option B.