200+ Power Plant Engineering (PPE) Solved MCQs

101.

Nuclear energy is only harmful.

A. true
B. false
Answer» B. false
Explanation: nuclear energy can be both beneficial and harmful, depending on the way in which it is used. for example x-rays which are used to examine bone fracture is useful.
102.

Which State in India nuclear accident took place?

A. tamil nadu
B. karnataka
C. gujarat
D. rajasthan
Answer» A. tamil nadu
Explanation: a small amount of nuclear accident observed in the villages and towns around the kalpakkam nuclear station, south of chennai in tamil nadu, in an ongoing study by pugazhendi. it was took place in january 2003.
103.

Which one of the following medical condition caused by the high exposure of radiation?

A. kidney stone
B. aids
C. mutation
D. blood pressure
Answer» C. mutation
Explanation: excessive exposure to the radiations leads to mutation, which are changes in the genetic makeup of the cells. mutations can occur in the tissues of the body and may manifest themselves as abnormal tissue growth known as cancer.
104.

What is the main purpose of nuclear energy?

A. to kill the enemy nation
B. to waste the excessive energy
C. to use it as an alternate source of energy
D. to cause mutation for people who are working
Answer» C. to use it as an alternate source of energy
Explanation: nuclear energy was developed by man as an alternate source of clean and cheap energy when compared to fossil fuels. along with the benefits of nuclear energy, there have been a number of accidents which harm many lives.
105.

Approximately how many percentage of electricity produced by nuclear power in the world?

A. 10
B. 14
C. 17
D. 20
Answer» C. 17
Explanation: approximately 17% of electricity produced by nuclear power in the world. nuclear power is being used worldwide for the generations of electricity. with numerous harm effects of nuclear power the main advantage is to produce electricity from nuclear power.
106.

The use of nuclear energy in the war had devastating effects on humans and on the earth.

A. true
B. false
Answer» A. true
Explanation: during war nuclear power is used only once so far. the united states dropped two atomic bombs over the japanese towns of hiroshima and nagasaki in 1945.
107.

Spillway discharges the overflow water to the downstream side when the reservoir is full.

A. true
B. false
Answer» A. true
Explanation: a condition may arise during flood periods when water level increases beyond the capacity of reservoir. in such conditions spillway acts as safety valve.
108.

Trash racks are built for  

A. discharging the water freely from the turbine exit to tailrace
B. preventing the turbine from ingress of floating and other materials
C. creating artificial head to store sufficient potential energy of water
D. controlling the opening of valves
Answer» B. preventing the turbine from ingress of floating and other materials
Explanation: heavy solid materials flowing with water can damage the turbine blades if not stopped. trash racks are closely spaced flat bars which provides narrow path from which such unwanted materials cannot pass.
109.

Penstock in a hydroelectric power plant is

A. a pipe connected to runner outlet
B. nozzle that release high pressure water on turbine blades
C. a conduit connecting forebay to scroll case of turbine
D. a pipe connecting surge tank to dam
Answer» C. a conduit connecting forebay to scroll case of turbine
Explanation: penstocks are the conduit built of steel or reinforced concrete. penstock
110.

The pressure at the inlet or exit of the draft tube should not be  

A. less than one third of atmospheric pressure
B. greater than one third of atmospheric pressure
C. less than one atmospheric pressure
D. greater than one atmospheric pressure
Answer» A. less than one third of atmospheric pressure
Explanation: decrease in pressure in any portion of turbine below one third of atmospheric pressure may cause vapour bubbles or cavities to form. this phenomenon is called cavitation. also to maintain continuity of flow without vaporisation the pressure should not fall below vapour
111.

Draft tube increases the operating head on the turbine.

A. true
B. false
Answer» A. true
Explanation: draft tubes are the pipes of suitable diameter attached to the runner outlet. draft tube converts the pressure developed by water leaving from turbine into kinetic energy. this in turn increases the operating head on turbine.
112.

Trash racks are located  

A. near tailrace
B. at the entrance of turbine
C. inside penstock
D. intake
Answer» D. intake
Explanation: intake includes headworks at the entrance of conduit. those headworks include different structures, trash racks are one of them. trash racks are fitted directly at the intake to prevent the floating and other materials from going into the conduit.
113.

What is the function of booms?

A. it supports the dam
B. it supports the penstock
C. it divert the icebergs from flowing into the penstock
D. to hold the turbine structure
Answer» A. it supports the dam
Explanation: booms are the one of those structures made at the intake. they are constructed to prevent unwanted solid materials from flowing into the penstock. solid materials like icebergs, wood logs or other heavy materials which may cause damage to the turbine blades if reached there.
114.

How much is the average temperature at depth of 10 km of earth surface?

A. 200oc
B. 900oc
C. 650oc
D. 20oc
Answer» A. 200oc
Explanation: the heat is apparent from the increase in temperature of the earth with increasing depth below the surface. although higher and lower temperature occurs, the average temperature at depth of 10 km is about 200oc.
115.

What is hot molten rock called?

A. lava
B. magma
C. igneous rocks
D. volcano
Answer» B. magma
Explanation: magma is a mixture of molten or semi-molten rock, volatiles and solid that is found beneath the surface of the earth, and
116.

What does EGS stand for in geothermal energy?

A. engraved geothermal systems
B. enhanced geothermal system
C. exhaust gas system
D. engineered geo physical system
Answer» B. enhanced geothermal system
Explanation: the development of a geothermal system where hydraulic fracturing of the system can allow the production at a commercial level. egs’s are engineered reservoirs created where there is geothermal energy but a lack of permeability. fluid is injected into the earth‘s surface which causes pre-existing fractures to open again, creating permeability. nationwide potential with engineered reservoirs 6-km to 8-km deep.
117.

Who invented first geothermal plant?

A. michael faraday
B. piero ginori conti
C. enrico fermi
D. guglielmo marconi
Answer» B. piero ginori conti
Explanation: in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power. on 4 july 1904, at larderello, piero ginori conti powered five bulbs from a dynamo driven by a
118.

A geothermal solution containing appreciable amounts of sodium chloride or other salts is called as  

A. fluids
B. brine
C. solvent
D. magma
Answer» B. brine
Explanation: brine is a high-concentration solution of salt (usually sodium chloride) in water. in different contexts, brine may refer to salt solutions ranging from about 3.5% (a typical concentration of seawater, on the lower end of solutions used for brining foods) up to about 26% (a typical saturated solution, depending on temperature).
119.

Earth’s outer layer rock is called as

A. mantle
B. crust
C. outer core
D. asthenosphere
Answer» B. crust
Explanation: earth’s crust is earth’s hard outer layer. it is less than 1% of earth’s volume. the crust is made up of different types of rocks: igneous, metamorphic, and sedimentary rocks. crust is also called as lithosphere.
120.

The hole on earth’s surface from where the steam from the earth comes out is called as

A. gash
B. mud pot
C. void
D. fumarole
Answer» D. fumarole
Explanation: a fumarole is an opening in a planet’s crust, often in areas surrounding volcanoes, which emits steam and gases such
121.

A spring that shoots jets of hot water and steam into the air is called as  

A. mine hole
B. geyser
C. hot spring
D. mud pot
Answer» B. geyser
Explanation: geysers are temporary
122.

Which kind geothermal plant is most common type?

A. dry steam
B. flash
C. binary
D. wet steam
Answer» B. flash
Explanation: flash steam power plants are the most common form of geothermal power plant. the hot water is pumped under great pressure to the surface. when it reaches the surface the pressure is reduced and as a result some of the water changes to steam. this produces a ‘blast’ of steam. the cooled water is returned to the reservoir to be heated by geothermal rocks again.
123.

How much is the efficiency of geothermal plant?

A. 28%
B. 15%
C. 42%
D. 30%
Answer» B. 15%
Explanation: geothermal power plants have lower efficiency relative to other thermal power plants, such as coal, natural gas, oil, and nuclear power stations. it is commonly assumed that only 15% of the energy from the produced geothermal fluid can be converted
124.

The area under the load curve represents

A. the average load on power system
B. maximum demand
C. number of units generated
D. load factor
Answer» C. number of units generated
Explanation: load curve is obtained by plotting fluctuating load be keeping load on y axis and time in x axis. the area under the load curve represents the total number of units generated in a particular time.
125.

Which of the following is equal to the maximum demand?

A. the ratio of area under curve to the total area of rectangle
B. the ratio of area under curve and number of hours
C. the peak of the load curve
D. the area under the curve
Answer» C. the peak of the load curve
Explanation: the ratio of area under curve to the total area of the rectangle is called load factor. the ratio of area under the curve to the number of hours represents the average load. the peak of the curve represents the maximum demand.
126.

Load duration curve indicates  

A. the variation of load during different hours of the day
B. total number of units generated for the given demand
C. total energy consumed by the load
D. the number of hours for which the particular load lasts during a day
Answer» D. the number of hours for which the particular load lasts during a day
Explanation: the variation of load during different hours of the day is shown by load curve. load duration curve is different from load curve. load duration curve indicates the variation of the load, but with the load arranged in descending order of magnitude.
127.

During which time the demand of electrical energy is maximum?

A. 2 a.m. to 5 a.m.
B. 5 a.m. to 12 p.m.
C. 12 p.m. to 7 p.m.
D. 7 p.m. to 9 p.m
Answer» D. 7 p.m. to 9 p.m
Explanation: from the load curve it is obtained that during early morning demand is always low. around 5 a.m. it starts increasing and around 9 a.m. load reaches a high value and remains almost constant till evening except for some dip during lunch hours. the load again starts increasing in evening hours and reaches its peak around 7 to 9 p.m.
128.

Size and cost of installation depends upon

A. average load
B. maximum demand
C. square mean load
D. square of peak load
Answer» B. maximum demand
Explanation: the greatest of all “short time interval averaged” during a given period, on the power system is called the maximum demand. maximum demand represents the maximum amount of load that is active, out of total connected load. so the size and rating of power plant depends on maximum demand.
129.

What is Demand factor?

A. ratio of connected load to maximum demand
B. ratio of average load to connected load
C. ratio of maximum demand to the connected load
D. ratio of kilowatt hour consumed to 24 hours
Answer» C. ratio of maximum demand to the connected load
Explanation: demand factor is the ratio of actual maximum demand on the system to the total load connected to the system. the idea of demand factor was introduced due to the fact that all the equipments connected to the
130.

The load factor is  

A. always less than unity
B. less than or greater than 1
C. always greater than 1
D. less than zero
Answer» A. always less than unity
Explanation: load factor is the ratio of average demand to the maximum demand. average demand can not be greater than maximum demand. so the value of load factor is always less than unity.
131.

In practice what is the value of diversity factor?

A. less than unity
B. geater than unity
C. equal to or greater than unity
D. less than zero
Answer» B. geater than unity
Explanation: maximum demand of different consumers never occurs at a time, due to this the total maximum demand of the load is always less than sum of individual maximum
132.

Which of the following is called as cold reserve?

A. reserve capacity available but not ready for use
B. reserve capacity available and ready for use
C. generating capacity connected to bus and ready to take load
D. capacity in service in excess of peak load
Answer» A. reserve capacity available but not ready for use
Explanation: cold reserve is the generating capacity which is available for service but not normally ready for immediate loading.
133.

How are moderate active solid wastes disposed?

A. buried underground
B. buried under sea
C. sent to outer space
D. left out in streams or rivers
Answer» A. buried underground
Explanation: in a nuclear fuel cycle, the solid, liquid and gaseous radioactive wastes are produced at different stages. these radioactive wastes must be disposed off in such a manner that there is no hazard to the human and plant life. moderate active solid wastes are buried in the ground.
134.

Moderate liquid nuclear wastes are disposed into  

A. deep pits
B. buried underground
C. left into rivers
D. left into deep oceans
Answer» A. deep pits
Explanation: moderate liquid wastes after preliminary treatments are discharged in deep pits or day well from which they sweep out into the surrounding. certainly liquid wastes are mixed with some kind of other chemical in order to lower their radioactivity.
135.

How are active liquids of nuclear waste disposed?

A. stored in concrete tanks and buried underground
B. stored in concrete tanks and buried in sea
C. mixed with other chemicals and left into free atmosphere
D. they are reused and burnt away in gaseous fumes
Answer» A. stored in concrete tanks and buried underground
Explanation: active liquids are kept in concrete tanks and these tanks are buried in the ground till their decay of radio activity. many times the radio activity increases the temperature of the liquid waste or sometimes these liquids boil and the activity decreases with time.
136.

Can vacated coal mines be used for waste disposal.

A. true
B. false
Answer» A. true
Explanation: yes, vacated coal mines can be used for waste disposal. the wastes are disposed in the salt heaps provided in the mines, because salt is a powerful absorber of radioactive emissions. it will be easy and more economical method to dispose of liquid waste by freezing.
137.

How is High Level solidified nuclear wastes (HLW) stored?

A. concrete tanks
B. canisters
C. packed rock salt
D. soil bins
Answer» B. canisters
Explanation: the solidified waste is placed in canisters that are stored in holes formation
138.

Absorption of radioactive element by human, affects their offspring’s.

A. true
B. false
Answer» A. true
Explanation: absorption of neutron or radioactive element by a tissue nucleus leads to radioactive nucleus which results change in chemical nature, mal-functioning of cell. due to this, cell damages leading to genetic modification. inhale of radioactive material through air, food and water result radiation hazard.
139.

For how many days is radioactive solid waste kept is kept under water at 6m deep for initial cooling?

A. 15 days
B. 50 days
C. 30 days
D. 100 days
Answer» D. 100 days
Explanation: it is necessary to keep the radioactive solid waste first in the water of 6m depth nearly for 100 days. it was found that after 100 days cooling of radioactive waste of 28mw plant in water still has a radioactivity equal to million grams of radium. about 50% radioactive elements disappear during cooling.
140.

What are released into biosphere from nuclear power plants?

A. gaseous effluents
B. waste product
C. smoke
D. the obtained product
Answer» A. gaseous effluents
Explanation: under normal operation, gaseous effluents are released slowly from the power plants into the biosphere and become diluted and dispersed harmlessly. releasing at slow rates gives it time to blow of slowly.
141.

Tailings forms are the residues from

A. uranium
B. thorium
C. cadmium
D. boron
Answer» A. uranium
Explanation: tailings are residues from uranium mining and milling operations. they contain low concentration of naturally occurring radioactive materials. they are generated in large volumes and are stored at the mine or mill sites.
142.

LLW stands for

A. low level water
B. low laser width
C. low level waste
D. loss of levels in water
Answer» C. low level waste
Explanation: low level waste contains less than 10 nci per gram of transuranium contaminants containing low but potentially hazardous concentrations of radioactive materials. these are generated in almost all activities involving radioactive materials, require little or no shielding.
143.

What is the unit of Heat rate?

A. kj/kw
B. kw/kj
C. kj
D. kw
Answer» A. kj/kw
144.

Rankine efficiency of a Steam Power Plant

A. improves in summer as compared to that in winter
B. improves in winter as compared to that in summer
C. is unaffected by climatic conditions
D. none of the mentioned
Answer» B. improves in winter as compared to that in summer
145.

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 mentioned
Answer» D. all of the mentioned
146.

What is the actual turbine inlet temperature in Rankine cycle?

A. 700c
B. 800c
C. 550c
D. 1150c
Answer» C. 550c
147.

Rankine cycle efficiency of a good Steam Power Plant may be in the range of?

A. 15 to 20%
B. 35 to 45%
C. 70 to 80%
D. 90 to 95%
Answer» B. 35 to 45%
148.

A simple Rankine cycle produces 40 MW of power, 50 MW of process heat and rejects 60 MW of heat to the surroundings. What is the utilization factor of this co generation cycle neglecting the pump work?

A. 50
B. 60
C. 70
D. 80
Answer» B. 60
149.

Which type of boilers use orifice to control the flow circulation?

A. natural circulation boilers
B. forced convection boilers
C. once-through boilers
D. positive forced circulation boilers
Answer» B. forced convection boilers
150.

What is the advantage of having smaller ratio of water to steam space?

A. steam can be generated at a faster even if the boiler is cold
B. increases the rate of evaporation
C. water is made cyclic, i.e., from boiler drum to water tube and back to drum
D. helps in mobilizing the boiler
Answer» A. steam can be generated at a faster even if the boiler is cold
151.

Which are the major types of boilers that are operated in world today?

A. natural circulation boiler
B. forced circulation boiler
C. fire tube boiler
D. once through boiler
Answer» D. once through boiler
152.

Cost of nuclear fuel in nuclear power plant economics is considered as                      

A. running cost
B. maintenance cost
C. capital cost
D. development cost
Answer» C. capital cost
153.

In economics of nuclear power plant taxes and insurance charges are taken as                

A. operating cost
B. maintenance cost
C. capital cost
D. fixed cost
Answer» D. fixed cost
154.

The land area required for installation of nuclear power plant is                  

A. more than thermal power plant
B. less than thermal power plant
C. equel to thermal power plant
D. depends on type of construction
Answer» C. equel to thermal power plant
155.

5 FUEL AND ASH HANDLING

A. coal ash produced destroys the machinery by entering into them
B. coal ash produced annually accounts for thousands of tones
C. coal ash can be reutilized for some other purpose
D. coal ash affects the health of people working at plants
Answer» B. coal ash produced annually accounts for thousands of tones
156.

Which system consumes less power out of all ash handling systems?

A. mechanical ash handling system
B. pneumatic ash handling system
C. hydraulic ash handling system
D. steam jet ash handling system
Answer» A. mechanical ash handling system
157.

Natural draught produced by a chimney depends upon                      

A. density of chimney gases
B. height of chimney
C. both ‘density of chimney gases’ and ‘height of chimney’
D. none of the mentioned
Answer» C. both ‘density of chimney gases’ and ‘height of chimney’
158.

In a furnace employing forced draught compared to induced draught                      

A. the fan operates hot and hence blades are liable to corrosion and erosion
B. positive pressure exists in the furnace
C. air is sucked in, so air leaks are more and hence furnace efficiency is reduced
D. none of the mentioned
Answer» C. air is sucked in, so air leaks are more and hence furnace efficiency is reduced
159.

Which of the following is not a reason of heating feed water?

A. it improves overall efficiency
B. it removes dissolved impurities
C. it prevents from thermal stress which may cause due to enter of cold water into boiler
D. it produces steam from feed water
Answer» D. it produces steam from feed water
160.

Mechanical method of water treatment is done to                            

A. heat the feed water
B. to remove solid matter and impurities
C. to add some solid materials
D. to remove dissolved gases
Answer» B. to remove solid matter and impurities
161.

Heat treatment arrangement used to separate or remove deserved gases and impurities from feed water is called the year later.

A. true
B. false
Answer» A. true
162.

Having two separate units for process heat and power is?

A. useful
B. useless
C. pollution reducing
D. none of the mentioned
Answer» B. useless
163.

In a back pressure turbine                            

A. pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process
C. pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process
D. none of the mentioned
Answer» A. pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
164.

The cogeneration plant efficiency nCO if WT, Qi, QH represents turbine work, heat input, heat output respectively is given by?

A. nco = (wt + qi) / qh
B. nco = (wt – qi) / qh
C. nco = (wt + qh) / qi
D. nco = (wt + qh) / qi
Answer» D. nco = (wt + qh) / qi
165.

Pass-out turbines are used in which of these cases?

A. relatively high back pressure
B. small heating requirement
C. only relatively low back pressure
D. both relatively high back pressure and small heating requirement
Answer» D. both relatively high back pressure and small heating requirement
166.

Which of these is a working fluid in the topping plant of a Brayton-Rankine combined plant?

A. hydrogen
B. helium
C. nitrogen
D. all of the mentioned
Answer» B. helium
167.

To improve the efficiency of the gas turbines, which among these are used?

A. regenerator
B. inter cooling
C. reheating
D. all of the mentioned
Answer» D. all of the mentioned
168.

Which material is used for the manufacture of the turbine blades?

A. stainless steel
B. carbon steel
C. high nickel alloy
D. high alloy steel
Answer» C. high nickel alloy
169.

Which of the following is a type of Gas Turbine Plant?

A. single acting
B. double acting
C. open
D. none of the mentioned
Answer» C. open
170.

Which among these is the main component of a gas turbine plant?

A. condenser
B. compressor
C. boiler
D. both compressor & boiler
Answer» B. compressor
171.

The maximum steam temperature in a power cycle in degree centigrade is?

A. 600
B. 500
C. 300
D. 100
Answer» A. 600
172.

By superposing a high temperature power plant as a topping unit to the steam plant, the energy conversion efficiency achieved is?

A. higher
B. lower
C. maximum
D. minimum
Answer» A. higher
173.

Which of these is not a merit of nuclear power?

A. amount of fuel required is small
B. plant requires a huge amount of area
C. demand for coal and oil is reduced
D. most economical in large quantities
Answer» B. plant requires a huge amount of area
174.

The thermionic generator is essentially which kind of device?

A. low voltage & high current
B. high voltage & high current
C. low voltage & low current
D. high voltage and high current
Answer» A. low voltage & high current
175.

In an electron beam, the average kinetic energy of an electron is given by                      

A. 2kt
B. 3kt
C. 1.5kt
D. 2.5kt
Answer» A. 2kt
176.

PWR stands for                  

A. power
B. partially weathered rock
C. pressurized water reactor
D. packaging waste regulations
Answer» C. pressurized water reactor
177.

Select the incorrect statement which supports PWR.

A. water is used as coolant
B. pwr is stable in operation
C. uses natural fuel
D. pwr has positive power demand coefficient
Answer» C. uses natural fuel
178.

LWR stands for                    

A. lower water reactor
B. line water reactor
C. liquefied water reactor
D. light water reactor
Answer» D. light water reactor
179.

In which of the Following reactor is heavy hydrogen isotope H-2 is used as moderator?

A. boiling water reactor
B. pressurized water reactor
C. candu reactor
D. thermal reactor
Answer» C. candu reactor
180.

CANDU stands for                          

A. canadian natural darmstadtium uranium
B. canadian natural deuterium uranium
C. canadian natural dubnium uranium
D. canadian natural dysprosium uranium
Answer» B. canadian natural deuterium uranium
181.

GCFBR stands for                          

A. gas conditioned fast breeder reactor
B. gas cooled fast breeder reactor
C. gas conditioned fast boiling reactor
D. gas cooled fast breeder reactor
Answer» B. gas cooled fast breeder reactor
182.

The mass number of an element is not changed, when it emits                       radiations.

A. α & γ
B. α, β, & γ
C. α & β
D. β & γ
Answer» D. β & γ
183.

Which is the most commonly used molten metal for cooling of nuclear reactors?

A. zinc
B. sulphur
C. sodium
D. manganese
Answer» C. sodium
184.

Fast breeder reactors do not                      

A. use molten sodium as coolant
B. use fast neutrons for fission
C. use th-232 as fissile fuel
D. convert fertile material to fissile material
Answer» C. use th-232 as fissile fuel
185.

A boiling water reactor is the one, in which the                      

A. pressurised water is pumped into the core.
B. coolant water, after being heated in the reactor core, generates steam in a boiler
C. fuel and the coolant are thoroughly mixed to form a homogeneous solution
D. coolant water is allowed to boil in the core of the reactor
Answer» D. coolant water is allowed to boil in the core of the reactor
186.

Thermal shield is used in high powered nuclear reactors to                      

A. absorb the fast neutrons
B. protect the walls of the reactor from radiation damage
C. slow down the secondary neutrons
D. protect the fuel element from coming in contact with the coolant
Answer» B. protect the walls of the reactor from radiation damage
187.

Where was the first use of nuclear bombs which cause death to the millions of lives?

A. karachi
B. melbourne and sydney
C. hiroshima and nagasaki
D. tokyo
Answer» C. hiroshima and nagasaki
188.

Who made the famous “Atoms for Peace” speech?

A. abraham lincoln
B. jawaharlal nehru
C. dwight d eisenhower
D. parker chewier
Answer» C. dwight d eisenhower
189.

How many percentage of fissionable U-235 occurring in uranium?

A. 0.1%
B. 0.5%
C. 0.7%
D. 1.5%
Answer» C. 0.7%
190.

Which is the main source of nuclear radiations?

A. nuclear power plant
B. sunlight
C. atmospheric air
D. volcanoes
Answer» A. nuclear power plant
191.

Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?

A. valves and gates
B. draft tubes
C. spillway
D. surge tank
Answer» D. surge tank
192.

Trash racks are built for                        

A. discharging the water freely from the turbine exit to tailrace
B. preventing the turbine from ingress of floating and other materials
C. creating artificial head to store sufficient potential energy of water
D. controlling the opening of valves
Answer» B. preventing the turbine from ingress of floating and other materials
193.

The pressure at the inlet or exit of the draft tube should not be                    

A. less than one third of atmospheric pressure
B. greater than one third of atmospheric pressure
C. less than one atmospheric pressure
D. greater than one atmospheric pressure
Answer» A. less than one third of atmospheric pressure
194.

Which statement about surge tank is wrong?

A. ideal location of surge tank is at the turbine inlet
B. a decrease in load demands cause a rise in water level in surge tank
C. surge tanks are totally closed to avoid entry of unwanted objects to penstock
D. surge tanks are installed to reduce harm effects of water hammer phenomenon
Answer» C. surge tanks are totally closed to avoid entry of unwanted objects to penstock
195.

Trash racks are located                            

A. near tailrace
B. at the entrance of turbine
C. inside penstock
D. intake
Answer» D. intake
196.

How many kinds of Geo thermal steams are there?

A. 2
B. 3
C. 4
D. 5
Answer» A. 2
197.

A geothermal solution containing appreciable amounts of sodium chloride or other salts is called as                      

A. fluids
B. brine
C. solvent
D. magma
Answer» B. brine
198.

A spring that shoots jets of hot water and steam into the air is called as                

A. mine hole
B. geyser
C. hot spring
D. mud pot
Answer» B. geyser
199.

What is the advantage of sectionalizing of power plant?

A. high reliability
B. low capital cost
C. low maintenance
D. easy operation
Answer» A. high reliability
200.

Load duration curve indicates                

A. the variation of load during different hours of the day
B. total number of units generated for the given demand
C. total energy consumed by the load
D. the number of hours for which the particular load lasts during a day
Answer» D. the number of hours for which the particular load lasts during a day
Tags
Question and answers in Power Plant Engineering (PPE), Power Plant Engineering (PPE) multiple choice questions and answers, Power Plant Engineering (PPE) Important MCQs, Solved MCQs for Power Plant Engineering (PPE), Power Plant Engineering (PPE) MCQs with answers PDF download