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
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
The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called
A Natural draught
B Induced draught
C Forced draught
D Balanced draught
For the same draught produced the power of induced draught fan as compared to forced draught fan is
A less
B more
C same
D not predictable
Power required in case of forced draught as compared to induced draught (for the same draught produced) is
A Same
B Less
C More
D Either more or less; depends on the flue gas density
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
The draught produced by chimney of given height at given outside temperature
A decreases if the chimney gas temperature increases
B increases if the chimney gas temperature increases
C remains same irrespective of chimney gas temperature
D may increase or decrease
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by
A $${\text{V}} = \sqrt {2{\text{gH}}'} $$
B $${\text{V}} = \sqrt {\frac{{2{\text{g}}}}{{{\text{H}}'}}} $$
C $${\text{V}} = \frac{{{\text{H}}'}}{{\sqrt {2{\text{g}}} }}$$
D $${\text{V}} = 2{\text{g}}\sqrt {{\text{H}}'} $$

Next steps