A. Density of the chimney gases
B. Height of the chimney
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- Natural draft created by the chimney depends upon _____________________?
A. Temperature of the flue gas
B. Its height
C. Both A. & B.
D. Neither A. nor B. - Artificial draught produced by a fan can be controlled by the___________________?
A. Speed of the fan
B. Damper
C. Variation in the pitch of the fan blades
D. All A., B. and C. - Flue gas discharge velocity through chimney of a big thermal power plant may be around ________________ m/sec?
A. 0.5
B. 10
C. 50
D. 500 - For maximum discharge through a chimney, its height should be___________________?
A. 200 meters
B. Infinitely long
C. More than 105.7 metres
D. Equal to the height of the hot gas column producing draught - White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_________________?
A. Tar
B. Coke oven gas
C. Pitch
D. Pulverised coke - Stack (chimney) height in a big thermal power plant is dictated by the___________________?
A. Pollution control aspect
B. Draught to be created
C. Limitation of constructional facilities
D. None of these - Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of__________________?
A. Less air for combustion
B. Correct amount of air for combustion
C. Too much air for combustion
D. Pulverised coal in boilers - White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_______?
A. Tar
B. Sulphide Coke
C. Coke Oven Gas
D. Pulverised cokeSubmitted by: Muhammad Mutsadiq Umer
- The optimum percentage of excess air for combustion depends upon the _______________ of the fuel?
A. Type (solid, liquid or gaseous)
B. Calorific value
C. Sulphur content
D. Ignition temperature - Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________?
A. Higher calorific value
B. Lower hydrogen content
C. Both A. and B.
D. Neither A. nor B.