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This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant knowledge and support exam preparation. Choose a topic below to get started.
1. |
Height of coke oven is limited (say maximum up to 7 metres) mainly by the __________ |
A. | problem of uniform heating along its height. |
B. | structural strength of silica bricks |
C. | problem in door cleaning |
D. | buckling of ram of pusher car at the time of coke pushing |
Answer» B. structural strength of silica bricks | |
2. |
The maximum adiabatic flame temperature is attained when the fuel is burnt with __________ |
A. | theoretically required amount of air |
B. | less than theoretically required amount of air |
C. | more than theoretically required amount of air |
D. | theoretically required amount of oxygen |
Answer» E. | |
3. |
__________ present in coal is not determined in its ultimate analysis. |
A. | Fixed Carbon |
B. | Total Carbon |
C. | Nitrogen |
D. | Hydrogen |
Answer» B. Total Carbon | |
4. |
Coking time in beehive coke oven is about __________ |
A. | one week |
B. | 12 hours |
C. | 2-3 days |
D. | 2 weeks |
Answer» D. 2 weeks | |
5. |
Gobar gas is produced by the __________ of ‘gobar’ (cow dung). |
A. | Fermentation |
B. | Condensation |
C. | Combustion |
D. | Distillation |
Answer» B. Condensation | |
6. |
If d is the diffusion coefficient and t is the boundary layer thickness. Then the mass transfer coefficient k is given by? |
A. | k = d x t |
B. | k = d / t |
C. | k = d + t |
D. | k = d – t |
Answer» C. k = d + t | |
7. |
Which law deals with the rate of diffusion of Oxygen per unit surface area of the particle? |
A. | Kirchhoff’s Law |
B. | Plank’s Law |
C. | Fourier’s Law |
D. | Fick’s Law |
Answer» E. | |
8. |
Which of these is the outer most coating in the burning of a coke particle? |
A. | Oxygen |
B. | Carbon monoxide |
C. | Carbon dioxide |
D. | Ash Layer |
Answer» B. Carbon monoxide | |