Electrical Power Generation MCQ

1. Topping opping turb turbines ines are are A. low pre pressur ssure e condens condensing ing ones. ones. B. high high pressur pressure e condens condensing ing ones. ones. C. high pres pressure sure conde condensing nsing ones. ones. D. pressure pressure non condensing condensing ones.

2. Steam Steam turbi turbine ne are are gover governed ned by by A. bypa bypass ss gove govern rnin ing. g. B. nozz nozzle le gove govern rnin ing. g. C. thrott throttle le gover governin ning. g. D. all of the the abov above. e.

. A. B. C. D.

The governin governing g employed employed !or medium medium and larg larger er sized steam steam turbines turbines is nozz nozzle le.. bypass. ss. thr throttle ttle.. none none o! abov above. e.

". The e#ect e#ect o! condensing condensing !riction !riction in steam steam nozzles nozzles !or the same pressur pressure e ratio leads to A. no change change in e$ist velocity velocity !rom !rom the nozzle nozzle and %uality %uality o! e$ist e$ist steam. B. increase increase in dryness dryness !raction !raction o! o! e$ist e$ist steam. steam. C. decrease decrease in e$ist e$ist veloci velocity ty !rom !rom the nozzle. nozzle. D. both both (B) (B) and (C). (C).

&. Ash the main waste waste product product o! steam steam power plants plants with low grade grade coal coal 'may be tonnes per day(. This ash A. can be be used bric) ma)ing ma)ing near the plant plant side. side. B. can be dumped dumped in disused disused mines* mines* river river or sea or in an area area e$cavate e$cavated d in the waste land. C. can be be used in building building constructio construction. n. D. all of above. above.

+. Belt conveyors conveyors can can be employed employed !or transporti transporting ng coal at inclinat inclination ion up to A. ,&-. B. "&-. C. 20°. D. 1&-.

ly ash generally results !rom

diesel engine. pulverized coal boiler boil er..

gas turbine. /uidized bed boiler. B Dust can be separate !rom gas by abrupt changes o! /ow direction. impingement upon small ba0es. sudden velocity decreased owing to enlargement. any of above.

D  The !eed water treatment treatment is done mainly to avoid avoid carry over problem. embrittlement problem. corrosion and scale !ormation problems. All of above.

D t is necessary to heat h eat water be!ore !eeding it bac) to the boiler as because o! this A. some other other impurities impurities carried carried by steam steam and condensate condensate due to corro corrosion sion in boiler and condenser are precipitated outside the boiler. B. thermal thermal stresses stresses due to cold cold water entering entering the boiler boiler drum are are avoided. avoided. C. the dissolved o$ygen and carbon dio$ide dio$ide which would would otherwise corrode boiler are removed in !eed water heater. D. all of the above. D  The draught produced produced by a chimney is called the A. B. C. D.

natura naturall drau draught ght.. !orc !orced ed drau draugh ght. t. bala balanc nced ed dra draug ught ht.. indu induce ced d draug draught ht..

A  The draught is provided by chimney.

diesel engine. pulverized coal boiler boil er..

gas turbine. /uidized bed boiler. B Dust can be separate !rom gas by abrupt changes o! /ow direction. impingement upon small ba0es. sudden velocity decreased owing to enlargement. any of above.

D  The !eed water treatment treatment is done mainly to avoid avoid carry over problem. embrittlement problem. corrosion and scale !ormation problems. All of above.

D t is necessary to heat h eat water be!ore !eeding it bac) to the boiler as because o! this A. some other other impurities impurities carried carried by steam steam and condensate condensate due to corro corrosion sion in boiler and condenser are precipitated outside the boiler. B. thermal thermal stresses stresses due to cold cold water entering entering the boiler boiler drum are are avoided. avoided. C. the dissolved o$ygen and carbon dio$ide dio$ide which would would otherwise corrode boiler are removed in !eed water heater. D. all of the above. D  The draught produced produced by a chimney is called the A. B. C. D.

natura naturall drau draught ght.. !orc !orced ed drau draugh ght. t. bala balanc nced ed dra draug ught ht.. indu induce ced d draug draught ht..

A  The draught is provided by chimney.

is used small steam boiler. can also be used in large steam boiler i! economizers and preheater have been used. both (A) and (B).

D  The draught produced produced in locomotive boiler boiler is by stea !et.

chimney. !orced law. law. motion o! locomotive. A Articial draught is produced by A. an indu induce ced d !an. !an. B. a !or !orce ced d !an !an.. C. induced induced and forced forced fan. C or !orced draught the bowler is located A. B. C. D.

near the the base of of the boiler boiler.. near near the base base o! o! chimney chimney. at the the top top o! o! chimn chimney ey.. any wher where e permis permissib sible. le.

A nduced draught !an are used to control the heater generated in nuclear reactor. reactor. forced the air inside the coal furnace.

pull the gas out o! the chimney. cool the hot gases coming out o! the boiler. boiler. B n !orced draught the main !unction o! the chimney is to reduce the temperature o! the discharge hot gases. discharge gases high up in the atospheric fro the point of vie" of air pollution.

accelerate !uel combustion.

all o! the above. B 3hich o! !ollowing e%uipment is installed in thermal power plant to reduce air pollution4 Air lter. Stoc). Air electrostatic precipitator.

5one o! them. C 6lectrostatic precipitator is installed between boiler !urnace and economiser. D !an and chimney. air preheater and induced fan.

economizer and air preheater. C  Turbo alternators run at a constant speed of #000 rp.

a constant speed o! 1777 rpm. a variable speed above 1777 rpm. a variable speed around 2777 rpm. A

3hich o! the !ollowing statements regarding load curve is true4  The area o! the load curve divided by the number o! hours gives load !actor.  The area under curve gives arrange demand. $he ratio of area under the load curve to the total area of the rectangle in "hich it is contained gives the load factor.

 The area o! load curve divided by the number o! hours gives the demand !actor. C A mass curve can be plotted !rom

6nergy load curve. 8oad duration curve. Chronological curve.

Both load duration curve and chronological load curve. C A power station9s plant load !actor is dened as the ratio o!  :inimum load to pea) load. :inimum load to average load. Average load to pea% load.

 The energy generated to that ma$imum energy that could have been generated. C

:a$imum demand on the power system is :a$imum value o! units ';3h( supplied during a period. nstantaneous ma$imum value interval averaged during a period. $he greatest of all short tie interval averaged deand during a period.

nstantaneous ma$imum value o! ;
Connect load to ma$imum demand. Average load to ma$imum demand. B Demand !actor on a power system is Al"ays lesser than unity.

Always greater than unity. 5ormally lesser than unity. 5ormally greater than unity.

A  Diversity !actor the ratio o!  Demand o! all consumers=average demand. u of a'iu deands of consuerssyste a'iu deand.

:a$imum demand o! consumers=average demand. 5one o! above. B Diversity !actor in a power system is 5ormally less than unity. 5ormally more than unity. Always less than unity. Al"ays ore than unity.

D Diversity !actor has direct e#ect on >perating cost per unit generated. *i'ed cost per unit per generated.

Both o! above. 5one o! above. B  Spinning reverse is  The reverse generating which is in operating nut is not is service. $he reverse generating capacity "hich is available for service but not in operation.

 The reverse generating capacity which is connected to the bus is ready to ta)e load. 5one o! above. B n a power plant* a reverse generating capacity which is in operation but not in service* is called the irm reverse. Cold reverse. Spinning reverse.

+ot reverse.

n a power plant* a reverse generating capacity* which is in operable condition and available !or service* but not in operation is called Cold reverse.

?ot reverse. irm reverse. Spinning reverse. The power which must be available ever under emergency conditions is )nown as ?ot reverse. Cold reverse. *ir reverse.

Spinning reverse.

@tilization !actor is dened as the ratio o!  &a'iu deand on the po"er plant to the rated capacity of the po"er plant.

Average demand to rated capacity o! the power plant. ated capacity o! the power plant to the ma$imum demand. 5one o! above. A The )nowledge o! diversity !actor helps in computing Average load. ,lant capacity.

ea) demand. @nits ';3h( generated. B lant capacity !actor is Actual energy producea'iu possible energy that could have been produced.

6nergy generated in a given period='ma$imum demand  hours o! operation in given period(.

Actual energy produce=plant capacity hours !or which the plant has been in operation. 5one o! above. A

3hich o! !ollowing statement is correct4 @tilisation !actor  Capacity !actor  load !actor. Capacity factor - oad factor / tilisation factor.

8oad !actor  Capacity !actor  @tilisation !actor. 5one o! these. B A large diversity !actor o! the load in a power system Does not a#ect the installation cost. 1educes the installation cost.

ncrease the installation cost. 5one o! above. B As the load !actor o! a generating plant increase the generation cost per ;3h generated ncreases. Decreases.

emain same. 5one o! these. B  Two port tari# is charged on the basis o!  @nit consumed. Connected load. :a$imum demand. Both A and B.

D

The long term load telecast !orecast is re%uired !or 6conomic operation plant. ,lanning the additional in generation capacity.

>peration o! plant. >peration o! plant 'D( both 'A( abd 'B(. B

n a thermal power station which o! the !ollowing is not a $ed cost4 nsurance changes. Salary o! high oEcials. nterest on capital cost o! land buildings. *uel and lubricating oil cost.

D n a power plant* which o! !ollowing items !all in the category o! semi$ed changes4 Salaries o! management and clerical sta#. All type o! ta$es and insurance changes. Annual interest and depreciation on capital cost. All of above.

D n a power plant which o! !ollowing items does not !all in the operating cost category4 alaries of anageent and clerical sta.

:aintenance and repair lost. Salaries o! operational and maintenance sta#. Salaries o! supervisory sta# engaged on the running o! the plant. A n a straight line method* annual depreciation changes are calculated by

 The capital cost divided by the number o! years o! li!e. :a)ing a provision !or setting each year a $ed rate* rst applied to the original cost and then to the diminishing value* depending upon the use!ul li!e o! the plant. $he capital cost inus salvage value divided by the nuber of year of life.

5one o! above. C  n comparison to steam plant* the annual $ed cost o! nuclear plant is 3uit high.

Fuit low. 6%ual. Does not say. A  n power plant insurance cover provided !or S)illed wor)er only. @n s)illed wor)er only. 6%uipment only. All of above.

D During which season the load on a power system is minimum4 Summer. 4inter.

ainy. Automn. B A load curve is a plot o!  8oad versus current. oad versus tie.

8oad versus duration o! time.  Total number o! unit generated versus time. B

During summer season load on the system increases* this due to 5ncreased use of fan6 aircoolers and air condition.

ncrese buisness activity. ncrease in demand water supply.
System voltage. :a$imum demand. B 8oad curve o! a power generating station is always Gero slop. ositive slop. 5egative slop. All of above.

D 8oad curve helps is deciding the >perating schedule o! generating units.  Total install capacity o! the plant. Size o! generating units. All of above.

D The chornolgical load curve indicates 8ariation in deand fro instant to instant during 29 hours.


8oad !actor o! a power plant is Al"ays less than unity.

Always more than unity. Henerally e%ual unity. 5ormally more than unity. A Connected load means 8oad drawn ny consumer at any instant. 5nstalled electrical load in the preises of a consuer.

:a$imum load consumer draws. 5one o! above. B 8oad duration curve gives >verage load. $he nuber of hours for "hich a particular load lasts during the day.

 The variation o! load during di#erent hours o! the day. 5one o! the above. B  A mass curve represents  The variation o! load during di#erent hours o! the day. $he total energy consued by the load upto a particular tie in a day.

Average load.  The number o! hours !or which a particular load lasts during the day. B ntegrated load duration curve representing total number o! units ';3?( generated !or a given demand in ;3 can be plotted directly !rom :ass curve. oad duration curve.

8oad curve. Any o! these.

B

nterconnected system have the advantage's( o!  mproved load !actor* diversity !actor. educed reversed plant capacity. All of the above.

5one o! the above. C or stable operation o! interconnected system* the passive element that can be used as the interconnecting element is Capacitor. esistor. 1eactor.

Both option A. and B. C A power system needs inIection o!
ea) load. ># pea) load. ull load. Both A and B.

D Shunt capacitor in a substation Deliver lagging 8A1s.

Deliver active power. Consume lagging
All o! above. C 8oad !re%uency controls are carried out with  controllers only.  controllers only. D controllers only. ,5D controllers.

D  The main obIective o! load !re%uency controller is to apply control o!  re%uency alone. re%uency and bus voltages. *re
re%uency and at the same time o! reactive power e$change via the outgoing lines. C n AHC* the voltage and !re%uency is controlled by $urbine speed control and e'citation control respectively.

6$citation control.  Turbine control speed control. 5one o! above. A Consider a power system with two plants S 1 and S2 connected through a tie line. 3hen the load !re%uency control o! the system* the /at tie line control system pre!erred over the !ault !re%uency regulation system because >nly the tie line re%uired to absorb the load swing.  The load change in a particular area is ta)en care by the generator in that area resulting in the tie line loading to remain constant. $his ensures that only the ore e=cient plants input is controlled for load variation in any area.

All o! the above. C  The voltage o! a bus can be controlled by controlling the

Active power o! bus. 1eactive po"er of the bus.

hase angle. hase angle and reactive power o! the bus. B  The permissible variation o! !re%uency in power system is J 7.1 ?z. > 0.? +z.

J 1 ?z. J & ?z. B During load shedding System !re%uency in reduced. System voltage is reduced. System power !actor is changed. yste loads are s"itched o.

D 8oad !re%uency control is achieved by properly matching the individual machine9s Henerated voltage.  Turbine and generating. $urbine inputs.

eactive power. C A pilot e$citer is provide on synchronous generator to Supplement the power generated by main generator. 7'cite the ain e'citer.

rovide tor%ue 'starting( to the generator. 5one o! above. B 3hen load shedding is restored to* it can be concluded that

lant is under repair. oad on the syste is ore than the installed capacity.

Both o! above. 5one o! above. B  The essential re%uirement's( !or power plants to be operated as as base load is=are e%uirement o! !ew operating personal and economical repair. 8ow operating cost. Capability o! operating continuously !or long period. All of above.

D n a moderate size steam power station* electrical power is generated at ""7 <. 1.1 ;<. @@ 8.

 ;<. C Annual operating cost o! generating plant consist o!  Semi$ed charges. i$ed charges. >perating or running charges. All of above.

D or a nuclear plant the use!ul li!e is e$pected to be about K7 years. +7 years. #0 years.

17 years. C  The interest on the capital cost is include in

Annual operating cost. Annual ;'ed cost.

Both o! above. 5one o! these. B 3hich o! !ollowing power plants is !ree !rom environmental problem4 Steam. +ydroelectric.

5uclear. Diesel engine. B

Has turbine power plants !or ma$imum eEcient may have eheating. ?eat e$changers. :ultistage compression. All of above.

D 3hich o! the !ollowing plants has the ma$imum capital cost4 Diesel plants. uclear plants.

?ydroLplants. Steam plants. B 3hich o! !ollowing generating plants has the minimum operating cost4 Diesel plant. +ydroelectric plant.

Steam plant. 5uclear plant.

B Direct conversion o! heat energy into electrical energy is possible through  Thermionic converters. uel or solar cell. :?D generator. Both A and C.

D 3hich o! the !ollowing power plants needs highly s)illed=%ualied engineers !or its operation4  Thermal. uclear.

?ydro. HasLturbine. B 3hich o! !ollowing power plants will ta)e long period in erection and installation4 Has turbine.  Thermal. +ydro.

5uclear. C A thermal power plant is being supplied with coal having much more ash content than that !or which it was designed. 3hich o! its !ollowing units needs maIor modications4 Condenser. Cooling tower. Ash handling unit.

ulversing unit. C n a thermal power plant* which o! its !ollowing components needs ma$imum maintenance attention4 Steam turbine.

Super heater. Boiler.

Condenser. C A generating station which has a high investment cost and low operating cost is usually operated as a Base load station.

ea) load station. :inimum load station. 5one o! above. A A gas turbine power plant is best suited !or ,ea% load.

Base load. 6mergency. 5one o! these.

A diesel power plant is generally used as a=an ea) loads. Base load. tandbyeergency plant.

Any o! above. C 3hich o! !ollowing power plants normally operate at high speeds4 ?ydro electric. $heral.

Diesel engine. etrol engine. B Ships are usually supplied power by

?ydraulic turbine. Steam accumulator. Diesel engine.

5one o! above. C  The power station that does not re%uire any moving part is Solar power generation. $herionic convertor.

3ind power generation.  Tidal power generation. B 3hich o! the !ollowing will ta)e least time in starting !rom cold condition to !ull load operation4 Has turbine plant. 5uclear power plant. +ydro electric po"er plant.

 Thermal power plant. C 3hich power plant cannot have single unit o! 177 :3 capacity Diesel engine plant.

Steam power plant. ?ydro electric power plant. 5uclear power plant. A  The generating station suitable to operate as pea) load plant is 5uclear power station. ,uped storage.

ower station.  Thermal power station. B

 The essential re%uirement's( !or power plants to be operated as pea) load plants are 8ow capital cost. Capability o! %uic) starts. Fuic) response to load variation. All of the above.

D 3ind as a source o! power Does not process the basic re%uirements o! any energy source. 5on Steady and unreliable. lenti!ul renewable and non polluting. All of the above.

D

:a$imum wind energy available is proportional to S%uare o! the rotor diam. Air density. Cube o! the wind velocity. All of the above

 The turbine used !or wind power plant is Steam turbine. Aeroturbine.

;aplan turbine. eaction turbine. B  MMMMMMMMMMMMMM type o! wind mill is o! simple design. 8ertical a'is "ind "ill.

?orizontal a$is wind mill. Both A and B.

5one o! above. A @nder !avorable conditions* use o! wind power !or MMMMMMMMMMMMMMMMMM is possible 8arge scale generation. :edium size plants. Small size plant. Both B and C.

D  The drawbac)'s( o! wind power plant is=are >utput voltage and !re%uency /uctuation. @nreliability and non steadiness. @nwieldy size* high structure area and %uite large nance re%uirements. All of above.

D Heothermal energy is A renewable energy source. Alternative energy source. n e$haustible energy source. All of above.

D A geothermal eld may yield ?ot water. Dry steam. 3et steam. All of above.

D n hydro thermal source o! geothermal energy :olten leva is available. ?ot gases are available. +ot "ater or stea is available.

All o! the above. C etrothermal system are composed o! hot dry roc) with Dense gases. etrochemicals. o underground "ater.

8arge under ground water. C Heothermal steam and hot water may contain +26 C26 +# and rando gas.

C>2. ?2S. 5?. A  The main disadvantage's( o! geothermal energy is=are 8arge area re%uirement. 8ow eEciency. Drilling operation is noisy. All of the above.

D A potential geothermal source region should have ?igh thermal conductivity. +igh theral gradient.

8ow thermal gradient. 5one o! these. B Heothermal power plant is suitable !or Base load po"er.

ea) load power. Both o! above.

5one o! above. A  Tidal power schemes could not be !ound economically Iustied because o!  5on availability o! tidal energy. ?igh cost o! civil engineering wor)s. Both of above.

5one o! above. C  The turbine normally employed in tidal power plants is eaction type. Simple impulse type. ropeller type. 1eversible type.

D  Tidal energy utilize ,otential energy of "ater.

;inetic energy o! water. Both o! above. none o! above. A n geothermal power plants waste water is Discharge into sea. Discharge bac% to earth.

ecirculated a!ter in cooling tower. 6vaporated in ponds. B ressure sand in geothermal water causes the errosim problem in vapour turbine 3ater circulation problem. ?eat e$change problem. 7rrosion proble.

5one o! above. C ressure o! noneLcondensable gases in geoLpressure water causes Corrosion problem. low problem. ollution problem. All of above.

D  The energy radiated by sun on a bright sunny day is about 277 3=m2. &77 3=m2. @.0 42.

2.& ;3=m2. C  n solar power plants the solar heat is trans!erred to 8i%uid metals. 3ater steam. :olten salt. Any of above.

D Sun trac)ing is re%uired in case o!  A /at plate collector. Cylinder parabolic and paraboloid.

Both A and B. 5one o! above. B

 e/ector mirrors employed !or e$ploiting solar energy are called +eliostats.

Di#users. onds. :antle. A  3hich o! the !ollowing area is preterred !or solar plants4 ?igh rain!ull zones. :ountain tops. +ot arid zones.

Coastal areas. C  Solar thermal power generation can be had by using lat plate collector. Solar ponds. ocussing or concentrating collectors. Any of above.

D  n a solar collector* the transparent cover is provided to  Trasmit solar radiation only. rotect collector !rom dust. educe heat losses. All of above.

D late plate collector s mainly used water heating* space heating and drying. s placed at proper inclination to the sun. ?as plate blac)end. All of above.

D The !unction o! a solar collector is o! converting solar energy into

$heral energy.

6lectrical energy directly. adiations. Any o! above. A  The /ate plate collector gives a  Temperature about 1&7- C with an eEciency o! &2N.  Temperature about 127- C with an eEciency o! "&N. $eperature about 0° C "ith an e=ciency of #0 E #?F.

5one o! above. C :ost o! solar radiations received on earth sur!ace is within the range o!  7.1 L 7.2& micron. 0.2? E 0.09 icron.

7.7" L 7.K micron. 7.+ L 7.O& micron. B Solar cells are made o!  Cadimium. ilicon.

Hermanium. Aluminium. B The solar or cell converts  Thermal energy into electrical energy. Chemical energy into electrical energy. olar radiations into electrical energy.

Solar raditions into thermal energy. C  The voltage o! a solar cell is

0.? E @ 8.

1 L 2 <. 2 L  <. " L & <. A A pyrometer can be used !or measurement o!  Di#use radiation only. Direct radiation only. Both of above.

5one o! above. C Solar cell* !or power generation* have the mains drawbac) o!  8ac) o! availability. 8ow eEciency. ?igh cost and maintenance problem. All of above.

D  A module is a arallel arrangement o! solar cells. Series arrangement o! solar cells. eries parallel arrangeents of solar cells.

5one o! these. C  The eEciency o! solar cell is about o!  @?F.

2&N. "7N. +7N. A The output o! a solar cell is o! order o! 

7.& 3. @.0 4.

&.7 3. 17.7 3. B or satellites* the source o! energy is uel cell 6ddison cell. olar cell.

Crygenic storage. C n an :?D generator the conductor is made o!  Has. 8i%uid metal. i
Copper and aluminium. C

ower output unit volume o! an :?D generator is S%uare o! the /uid velocity. S%uare o! the magnetic eld strength. Specic electrical conductivity o! gas. All of above.

D  The nature o! current developed in :?D generator is AC. DC.

6ither DC or AC. 5one o! above.

B Seeding material commonly used in :?D generator is Cesium. Aluminium. ,otassiu.

Sodium. C Seeding material into the wor)ing /uid in :?D generator in order to educe the temperature o! the gas. 5ncrease the conductivity of the gas.

educe the conductivity o! the gas. 5one o! above. B  The concept o! :?D generation depends much more on the MMMMMMMMMMMMMMMMMMMM o! the gas in the duct. ermittivity. Conductivity.

ermeability. 5one o! these. B  The advantage's( o! an :?D system is=are Absence o! moving part. Conservation o! !uel. 8ow pollution. All of above.

D An :?D system !or eEcient operation needs Arrangement !or superheating o! air. nIection and recovery o! speed material. A magnet capable o! producing high magnetic /u$ density.

All of above.

D n an :?D generator the ionization potential o! the seeding material should be $he lo"est possible.


&77- C. C uel cell converts chemical energy into :echanical energy. Chemical energy. 8ow voltage alternating current electrical energy. o" direct alternating current electrical energy.

D uel cell have coneversion eEciencies o! about 2&N. "7N. +&N. K&N. C  The materials used !or electrodes in thermo electric generators are nsulator. Carbone. :etal conductor.

ei conductor.

D  Thermonic convertor utilize  Thomos e#ect. Seebac) eEcient. $heronic eission eect.

eltier e#ect. C uel cell !or power generation have drawbac) o!  5oise* pollution and maintenance problems. 8ow series li!e and low voltage.
D Biogas consist o!  >nly ethane. >nly methane. A special oragnic gas. ðane and carbone dio'ide "ith soe ipurities.

D  The man by product o! biogas is=are Biogas. rganic anure.

Biomass. 5one o! above. B  The main source's( o! production o! biogas is=are ?uman waste. 3et live stoc) waste. 3et cow dung.

All of above.

D Biogas plants are suitable !or 5ural areas. Coal mines. Coercial cople'es.

:etallurgical industries. C n a !uel cell cathode is o!  Ammonia. >$ygen. Corbone mono$ide. +ydrogen.

D  The gas turbine power plants mainly use Has oil. atural gas and li
Coal and peat. ;erosine oil* diesel oil. B  The heating value o! gaseous !uels is about 17 ;P=litre. #0 Glitre.

177 ;P=litre. 77 ;P=litre. B Coal and peat value not generally used in gas turbine as !uel because o!   Their high cost.  Their non available.

Coal handling and ash handling probles.

All o! above. C Has turbine is widely used in umping station. Air crafts.

Auto mobiles. 8ocomotives. B  The blades o! gas turbine are made o!  +igh nic%el alloy.

Carbone steel. Stainless steel. ?igh alloy steel. A A gas turbine wor)s on an)ine cycle. Carnot cycle. Dual cycle. Brayton cycle.

D Has turbine power plants are not widely used As base local plants.

As pea) load plants. As standby power plants. n combination with steam power plants. A  The gas turbine power have the advantages o!  Fui) starting and capability o! pulting to share !ull load in !ew minute.

?igh overall eEciency* low specic consumption and long li!e in comparison to taht o! steam power plants. Simplicity o! design and installation* high reliability compactness* clean e$haust and low initial cost. Both A and C.

D 3hich o! !ollowing statement correct4 Has turbine power plants have the drawbac)s o! poor reliability and large space re%uirement. Capital cost o! a gas turbine power plant is higher than that o! a steam power plant. Aeroderivative turbines used clean !uel. 5n a gas turbine plant6 the cobustion ta%es place in the copressor.

D  The compressor has to be started At any time 'i.e. be!ore or a!ter starting o! gas turbine(. A!ter starting o! gas turbine. Before starting of gas turbine.

Simultaneous with starting o! gas turbine. C Compressor used in gas turbine is &ultistage a'ial Ho" copressor.

eciprocating compressor. Srew compressor. 6ither B or C. A >verall eEciency o! gas turbine is 6%ual to that o! an)ine or carnot cycle. :ore than that o! diesel cycle. ess than that of diesel cycle.

:ore than taht o! otto cycle. C

 The main drawbac)s o! gas turbine ?igh initial cost* poor reliability and large space re%uirements. 8ow overall eEciency* noisy operation and limited unit capacity. nability o! using coal or heavy residual petroleum as !uels. Both B and C.

D  The thermal eEency o! a gas turbine cycle with ideal regenrative heat e$change is 7
8ess than wor) ratio. :ore than wor) ratio. @npredic table. A Hreater part o! the power developed cycle with turbine is used in driving the compressor. t is arround &N. "&N. I?F.

,&N. C n a gas turbine plant* a regenrator increases ressure ratio. 3or) output. $heral e=ciency.

5one o! above. C n gas turbines* high thermal eEciency is obtained in >pen cycle. Closed cycle.

n both the cycle. 5one o! these.