Online Thermal Power Plant Test
- 1.Out of the following which one is not a non-conventional source of energy ?
- A.
Tidal Energy
- B.
Geothermal Energy
- C.
Nuclear Energy
- D.
Wind Energy
- 2.Pulverized coal is.....
- A.
Coal free from ash
- B.
Non-smoking coal
- C.
Coal which bums For long time
- D.
Coal broken into fine particles.
- 3.Heating value of Indonesian coal is approximately?
- A.
1000-2000 kcal / kg
- B.
2000-4000 kcal / kg
- C.
5000-6500 kcal / kg
- D.
9000-10,500 kcal / kg
- 4.Water gas is a mixture of ?
- A.
CO2 and O2
- B.
O2and H2
- C.
H2, N2 and O2
- D.
CO, N2 and H2
- 5.. Coal used in power plant is also known as
- A.
Steam coal
- B.
Charcoal
- C.
Coke
- D.
Soft coal
- 6.Which of the following is considered as superior quality of coal ?
- A.
Bituminous coal
- B.
Peat
- C.
Lignite
- D.
Coke
- 7.In a power plant, coal is carried from storage place to boilers generally by means of
- A.
Bucket
- B.
V-belts
- C.
Trolleys
- D.
Manually
- 8.Live storage of coal in a power plant means
- A.
coal ready for combustion
- B.
Preheated coal
- C.
Storage of coal sufficient to meet 24 hour demand of the plant
- D.
Coal in transit
- 9.Pressure of steam in condenser is
- A.
Atmospheric pressure
- B.
More than pressure
- C.
Slightly less than pressure
- D.
Much less than pressure
- 10.Equipment used for pulverizing the coal is known as
- A.
Ball mill
- B.
Hopper
- C.
Burner
- D.
Stoker
- 11.Power plants using coal work closely on known which of the following cycle ?
- A.
Otto cycle
- B.
Binary vapor cycle
- C.
Brayton cycle
- D.
Rankine cycle
- 12.Critical pressure of water is
- A.
1 kg / cm2
- B.
100 kg / cm2
- C.
155 kg / cm2
- D.
213.8 kg / cm2
- 13.The efficiency of a thermal power plant improves with
- A.
Increased quantity of coal burnt
- B.
Larger quantity of water used
- C.
Lower load in the plant
- D.
Use of high steam pressures
- 14.Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant ?
- A.
Reheating of steam at intermediate stage
- B.
Regeneration use of steam for heating boiler feed water
- C.
Use of high pressures
- D.
All of the above
- 15.Steam pressures usually used in thermal power plants are
- A.
5 kg/cm2 to 10 kg / cm2
- B.
50 kg/cm2 to 100 kg / cm2
- C.
110 kg/cm2 to 170 kg / cm2
- D.
200 kg/cm2 to 215 kg / cm2
- 16.Burning of low grade fuel can be improved by
- A.
Blending with better quality
- B.
Oil assisted ignition
- C.
Pulverizing
- D.
Any of the above
- 17.As steam expands in turbine
- A.
Its pressure increases
- B.
Its specific volume increases
- C.
Its boiling point increases
- D.
Its temperature increases
- 18.Water is supplied to a boiler
- A.
At atmospheric pressure
- B.
At slightly more than atmospheric pressure
- C.
At 100 cm/kg2
- D.
At more than the steam pressure on the boiler
- 19.Which of the following enters the super heater of a boiler ?
- A.
Cold water
- B.
Hot water
- C.
Wet steam
- D.
Super-heated steam
- 20.Super heated steam is always
- A.
At a temperature higher than the saturation temperature corresponding to a steam pressure
- B.
At a pressure more than the boiler steam pressure
- C.
Separated from water particles before being supplied to turbine
- D.
At a pressure less than the maximum cycle pressure
- 21.In economizer, the heat of flue gases is used to reheat the steam
- A.
True
- B.
False
- 22.Air heaters are used in power plants to heat air used for combustion of coal
- A.
True
- B.
False
- 23.Corrosion of air pre heater tube can be minimized by limiting the cooling of the flue gas to a temperature above the dew point
- A.
True
- B.
False
- 24.Air from air pre heater is sent to forced draft fans
- A.
True
- B.
False
- 25.In a silver oxide cell depolarization is accompanied by oxide of silver
- A.
True
- B.
False
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