Related Questions

Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
A Natural
B Induced
C Forced
D Chimney
White smoke coming out of the chimney of a furnace indicates the use of
A Low excess air
B Very high excess air
C Gaseous fuel in the furnace
D Liquid fuel in the furnace
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
In a city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city has neither black hair nor black eyes?
A 35
B 40
C 45
D 50
In a certain city 40% of the people have black hair, 25% have black eyes and 10% have both black hair and black eyes. What percentage of the people in the city have neither black hair nor black eyes?
A 35
B 40
C 45
D 50
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
The draught produced by steel chimney as compared to that produced by brick chimney for the same height is
A Less
B More
C Same
D May be more or less
The draught produced, for a given height of the chimney and given mean temperature of chimney gases
A decreases with increase in outside air temperature
B increases with increase in outside air temperature
C remains the same irrespective of outside air temperature
D may increase or decrease with increase in outside air temperature
The maximum discharge through a chimney occurs when the height of chimney is
A Infinitely long
B Around 200 meters
C Equal to the height of the hot gas column producing draught
D Outside temperature is very low
Smoke density of the flue gas going out of the chimney is measured by a
A Polarograph
B Thermal conductivity meter
C Photo electric cell
D Chromatograph

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