Related Questions

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
In a furnace employing forced draught as compared to induced draught,
A Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced
B The fan operates hot and hence blades are liable to corrosion and erosion
C Positive pressure exists in the furnace
D None of these
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 capacity of induced draft fan compared to forced draft fan in a boiler is
A Same
B More
C Less
D Less or more depending on size of boiler
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 ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
A Efficiency of the boiler
B Efficiency of the chimney
C Efficiency of the fan
D Power of the boiler
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?
A Long vertical evaporator
B Horizontal tube evaporator
C Agitated film evaporator
D Calenderia vertical tube evaporator
The stress induced in a body, when suddenly loaded, is _________ the stress induced when the same load is applied gradually.
A Equal to
B One-half
C Twice
D Four times
For forced draught system, the function of chimney is mainly
A to produce draught to accelerate the combustion of fuel
B to discharge gases high up in the atmosphere to avoid hazard
C to reduce the temperature of the hot gases discharged
D none of the above
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

Next steps