21.
In regenerative cycle, bled steam is
A
discharged to atmosphere
B
condensed in steam condenser
C
used to beat feed water for boiler
D
is mixed with steam supplied to turbine.
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In regenerative cycle, bled steam is
discharged to atmosphere
condensed in steam condenser
used to beat feed water for boiler
is mixed with steam supplied to turbine.
Which of the following enters the super heater of a boiler ?
Cold water
Hot water
Wet steam
Super-heated steam.
Live storage of coal in a power plant means
coal ready for combustion
preheated coal
storage of coal sufficient to meet 24 hour demandof the plant
coal in transit.
Pulverized coal is
coal free from ash
non-smoking coal
coal which bums For long time
coal broken into fine particles.
In a power plant, coal is carried from storage place to boilers generally by means of
bucket
belts
trolleys
manually.
A condenser in a thermal power plant condenses steam combing out of
Boiler
Super-heater
Economizer
Turbine.
Burning of low grade fuel can be improved by
Blending with better quality
Oil assisted ignition
Pulverizing
Any of the above.
Which coal will have highest ash content ?
Bituminous coal
Grade I steam coal
Coking coal
Lignite.
Which of the following is considered as superior quality of coal ?
Bituminous coal
Peat
Lignite
Coke.
Equipment used for pulverizing the coal is known as
Stoker.
Ball mill
Hopper
Burner
Pressure of steam in condenser is
much less than pressure.
atmospheric pressure
more than pressure
slightly less than pressure
Water is supplied to a boiler
at more than the steam pressure on the boiler.
at atmospheric pressure
at slightly more than atmospheric pressure
at 100 cm/kg2
Super heated steam is always
at a pressure less than the maximum cycle pressure.
at a temperature higher than the saturation temperature corresponding to a steam pressure
at a pressure more than the boiler steam pressure
separated from water particles before being supplied to turbine
A 100 MW thermal power-plant will consume nearly how many tonnes of coal in one hour ?
15,000 tonnes.
50 tonnes
150 tonnes
1500 tonnes
Standard frequency usually for electric supply is
50 to 55 Hz.
50 Hz
60 Hz
50 to 60 Hz
Most of the generators in thermal power plants run at
750 rpm.
3000 rpm
1500 rpm
1000 rpm
Overall thermal efficiency of a steam power station is in the range
68-79%.
18-24%
30-40%
44-62%
Which of the following is not the voltage at which power is usually transmitted(A)132 kV
20 kV.
132kV
66 kV
33 kV
What is the maximum size of steam turbine usually being installed, for thermal power plants ?
1000 MW
120 MW
250 MW
500 MW
The steam consumption per kWh of electricity generated in a modem power plant is of the order of
10-12 kgs.
1-2 kgs
2-4 kgs
5-7 kgs