Some important MCQ question on Power Plant Engineering.
Sub: Power plant Engineering
Test set- 01
Total no. of question 60
1. The power plant should be set up near the load centre as far as possible. True
2. Hydroelectric power plants have low operating cost but construction cost is enormously high. True
3. The farm capacity of hydroelectric power plant is low and so needs to be backed up by steam plants.True
4. Availability of storage facility increases the farm capacity of the hydroelectric power plant.True
5. Hydrology is a science which deals with depletion and replenishment of water resources good morning.True
6. Wind power plant is the least reliable.True
7. Generation of electric power from the sea water is more advantageous by tidal power. True
8. The power output from and hydroelectric power plant depends on discharge, head and steam efficiency. True
9. Gross head of an hydroelectric power station is the difference of water level between the level in the storage and tail race. True
10. With reference to hydropower station the graphical presentation of the discharge as a function of time is known as hydrograph. True
11.A modern steam power plant works on Rankine cycle. True
12. The efficiency of a normal thermal power plant is approximately 30 to 40 %. True
13. the average load factor of a thermal power plants in India is is 50 to 60%. True
14.Deaerative heating is done to remove dissolved gases in water. True
15. The efficiency of a boiler used in a modern steam power plant is of the order of 85%. True
16. Pipes carrying steam are generally made of Steel.True
17. In a superheater temperature rises and pressure remains unchanged. True
18. The function of the Economiser is to heat up the incoming water by the exhaust gases or flue gases. TrueTrue
19.In a steam power plant heat from the flue gases is recovered in condenser and air preheater.
20. Air preheater in a steam power plant recover the heat from the flue gases leaving the economiser. Improves combustion rate. Raises the temperature of the furnace gases.
True
Fill in theblanks.
1.In India more than 60% electric power is generated by____ power plants. Ans: steam
2. Useful life of hydroelectric power plant is about_______ years. Ans: 5
3.A hydrograph is a plot of____vs ____.Ans: Discharge or flow: time.
4._____ is a carve which indicates the total volume of run-off in metre cube up to a certain time.
Ans: Mass curve
5._____ is a closed conduit for supplying water under pressure to the turbine.Ans: Pen stock.
6.____ are employed where the slope is too great for a canal.Thee main purpose of surge tank in a pipeline is to relieve the the ____due to water hammer. Ans: Penstock, Sarge tank
7.An Earth Dam has very ____as compared to to its height.Ans: Wide
8. In a ____ turbine the ratio of width of the wheel to its diameter very varies from0.1 to 0.4.
Ans: Francis
9. In a ____ turbine the flow ratio where is from 0.4 to 0.6. Ans: Francis
10. Pelton turbine uses ____ energy e of water and is suitable for ____ heads. Ans: Kibetic, high
11.The function superheater is to ____ the steam temperature. Ans: Increase
12. The function of the superheater is to ___ superhit the partially expanded steam from the turbine Ans: Reheat.
13.An ___ is device that utilise the waste heat of the flue gases to heat the feed water. Ans: Economiser.
14. Air pre heater utilises the ____ left in the _____ gases before tge are discharged to the atmosphere. Ans: Heat , Flue
15. ____ is device in which the steam condense and heat so released is observed by the cooling tower water. Ans: Condenser
16. ____ a water tank in which hot water is distributed by pipes throughout and is sprayed in air through nozzles at a suitable pressure. Ans: Spray pond
17. The percentage of ash content in the coal varies from about ____percent in good quality coal to S____ percent in good quality coals. Ans: 5 : 40
18. Coaking coal is a form of ____ coals. Ans:Bituminas.
19. The equipment used for pulverizing the coal is _____. Ans: ball mill.
20.____ removes particulate matter by giving electrical charge to the particles.
Ans :Electrostatic precipitator.
MCQ type:
1. Load frequency control is achieved by properly matching the individual machine's
A.reactive powers
B.generated voltage
C. turbine inputs Ans
D. turbine and generator ratings
2. During load shedding
a. system voltage is reduced b.system frequency is reduced
c.system loads are switched off Ans
d.system power factor is changed
3. Generators for base load plans are usually designed for maximum efficiency
a. around 20% overload
b. full load Ans
c. 75% of full load.
4. Generator for power plants to supply exclusively peak loads are usually designed for maximum efficiency to occur at
a.full load
b . 50 to 75% full load. ans
c.25 to 50% load
d.10% full load
5. The connected load of a domestic consumer /medium income group is usually about
a. 2 to 5kw. :Ans
b.10 to 20 kilowatt
c. 20 to 30
d.below 1 kilowatt
6. a load curve is a plot of
a. Load versus duration of time
b. load versus current
c.load versus time : Ans
d. total number of units generated versus time
7. the area under the load curve represents
a. system voltage
b current
c.energy consumed : Ans
d. maximum demand
8 . The load duration curve of rectangular shape gives
a. the variation of load during different hours of the day
b.average load
c. the number of hours for which a particular load last during the day : Ans
9 The mass curve represent total energy consumed by the load up to a particular time in a day can be plotted from
a. load duration curve.
b.chronological load curvec. Ans:
c energy load curve
10. Maximum demand on the power system is the
a. greatest of all 'short time interval averaged demand during a period
b.instantaneous maximum value of kilowatt supplied during a period
c.maximum value of units in Kilowatt hour supplied during a period.
................. ............ ................
Sub: Power plant Engineering
Test set- 01
Total no. of question 60
1. The power plant should be set up near the load centre as far as possible. True
2. Hydroelectric power plants have low operating cost but construction cost is enormously high. True
3. The farm capacity of hydroelectric power plant is low and so needs to be backed up by steam plants.True
4. Availability of storage facility increases the farm capacity of the hydroelectric power plant.True
5. Hydrology is a science which deals with depletion and replenishment of water resources good morning.True
6. Wind power plant is the least reliable.True
7. Generation of electric power from the sea water is more advantageous by tidal power. True
8. The power output from and hydroelectric power plant depends on discharge, head and steam efficiency. True
9. Gross head of an hydroelectric power station is the difference of water level between the level in the storage and tail race. True
10. With reference to hydropower station the graphical presentation of the discharge as a function of time is known as hydrograph. True
11.A modern steam power plant works on Rankine cycle. True
12. The efficiency of a normal thermal power plant is approximately 30 to 40 %. True
13. the average load factor of a thermal power plants in India is is 50 to 60%. True
14.Deaerative heating is done to remove dissolved gases in water. True
15. The efficiency of a boiler used in a modern steam power plant is of the order of 85%. True
16. Pipes carrying steam are generally made of Steel.True
17. In a superheater temperature rises and pressure remains unchanged. True
18. The function of the Economiser is to heat up the incoming water by the exhaust gases or flue gases. TrueTrue
19.In a steam power plant heat from the flue gases is recovered in condenser and air preheater.
20. Air preheater in a steam power plant recover the heat from the flue gases leaving the economiser. Improves combustion rate. Raises the temperature of the furnace gases.
True
Fill in theblanks.
1.In India more than 60% electric power is generated by____ power plants. Ans: steam
2. Useful life of hydroelectric power plant is about_______ years. Ans: 5
3.A hydrograph is a plot of____vs ____.Ans: Discharge or flow: time.
4._____ is a carve which indicates the total volume of run-off in metre cube up to a certain time.
Ans: Mass curve
5._____ is a closed conduit for supplying water under pressure to the turbine.Ans: Pen stock.
6.____ are employed where the slope is too great for a canal.Thee main purpose of surge tank in a pipeline is to relieve the the ____due to water hammer. Ans: Penstock, Sarge tank
7.An Earth Dam has very ____as compared to to its height.Ans: Wide
8. In a ____ turbine the ratio of width of the wheel to its diameter very varies from0.1 to 0.4.
Ans: Francis
9. In a ____ turbine the flow ratio where is from 0.4 to 0.6. Ans: Francis
10. Pelton turbine uses ____ energy e of water and is suitable for ____ heads. Ans: Kibetic, high
11.The function superheater is to ____ the steam temperature. Ans: Increase
12. The function of the superheater is to ___ superhit the partially expanded steam from the turbine Ans: Reheat.
13.An ___ is device that utilise the waste heat of the flue gases to heat the feed water. Ans: Economiser.
14. Air pre heater utilises the ____ left in the _____ gases before tge are discharged to the atmosphere. Ans: Heat , Flue
15. ____ is device in which the steam condense and heat so released is observed by the cooling tower water. Ans: Condenser
16. ____ a water tank in which hot water is distributed by pipes throughout and is sprayed in air through nozzles at a suitable pressure. Ans: Spray pond
17. The percentage of ash content in the coal varies from about ____percent in good quality coal to S____ percent in good quality coals. Ans: 5 : 40
18. Coaking coal is a form of ____ coals. Ans:Bituminas.
19. The equipment used for pulverizing the coal is _____. Ans: ball mill.
20.____ removes particulate matter by giving electrical charge to the particles.
Ans :Electrostatic precipitator.
MCQ type:
1. Load frequency control is achieved by properly matching the individual machine's
A.reactive powers
B.generated voltage
C. turbine inputs Ans
D. turbine and generator ratings
2. During load shedding
a. system voltage is reduced b.system frequency is reduced
c.system loads are switched off Ans
d.system power factor is changed
3. Generators for base load plans are usually designed for maximum efficiency
a. around 20% overload
b. full load Ans
c. 75% of full load.
4. Generator for power plants to supply exclusively peak loads are usually designed for maximum efficiency to occur at
a.full load
b . 50 to 75% full load. ans
c.25 to 50% load
d.10% full load
5. The connected load of a domestic consumer /medium income group is usually about
a. 2 to 5kw. :Ans
b.10 to 20 kilowatt
c. 20 to 30
d.below 1 kilowatt
6. a load curve is a plot of
a. Load versus duration of time
b. load versus current
c.load versus time : Ans
d. total number of units generated versus time
7. the area under the load curve represents
a. system voltage
b current
c.energy consumed : Ans
d. maximum demand
8 . The load duration curve of rectangular shape gives
a. the variation of load during different hours of the day
b.average load
c. the number of hours for which a particular load last during the day : Ans
9 The mass curve represent total energy consumed by the load up to a particular time in a day can be plotted from
a. load duration curve.
b.chronological load curvec. Ans:
c energy load curve
10. Maximum demand on the power system is the
a. greatest of all 'short time interval averaged demand during a period
b.instantaneous maximum value of kilowatt supplied during a period
c.maximum value of units in Kilowatt hour supplied during a period.
................. ............ ................
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