The height of chimney in a power plant is governed by?
control of pollution
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quantity of flue gases to be handled
limitation of construction facilities
the draft to be created
Category: Mechanical Engineering
Which is not correct statement about effect of sulphur in fuel ?
Which is not correct statement about effect of sulphur in fuel ?
it erodes furnace walls
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it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
it helps in electrostatic precipitation of ash in flue-gases
it has heating value
Which is not correct statement about the function of furnace?
Which is not correct statement about the function of furnace?
separate ash from coal
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maintain heat supply to prepare and ignite the incoming fuel
mix fuel with air and ignite
to provide proper conditions for con-tinuous complete combustion
Which is not correct statement about pulverised fuel firing ?
Which is not correct statement about pulverised fuel firing ?
it is the best technique for burning high ash content fuel having low fusion ash
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fuel burns economically
heat release can be easily controlled
high burning rate is possible
Pick up wrong statement about desired properties of a good fuel?
Pick up wrong statement about desired properties of a good fuel?
high ignition point
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ease in storing
produce minimum smoke and gases
high calorific value
Thermal efficiency of a thermal power plant is of the order of?
Thermal efficiency of a thermal power plant is of the order of?
0.3
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0.2
0.15
0.45
The radius of a dished head is taken approximately as?
The radius of a dished head is taken approximately as?
one
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two
half
one-fourth
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine?
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine?
locomotive boiler
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Lancashire boiler
Babcock and Wilcox boiler
Cochran boiler
With increase in load, convection superheater has?
With increase in load, convection superheater has?
rising characteristic
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flat characteristic
linear characterisstic
drooping characteristic
Vacuum for reciprocating steam engines compared to steam turbines is?
Vacuum for reciprocating steam engines compared to steam turbines is?
less
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could be more or less depending on the size of plant
equal
more