4671052
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace alrededor de 8 años
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Pregunta 1
Pregunta
Some of the characteristics which make the gas turbine a better choice over other prime movers are
1. low maintenance
2. minimum cooling water
3. high thermal efficiency
4. rapid start-up and loading
Respuesta
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1,2,3,4
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1,2,3
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1,2,4
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1,3,4
-
2,3,4
Pregunta 2
Pregunta
The air side of a gas turbine regenerator is located
Respuesta
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before the compressor
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after the combustion chamber
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between the turbine and combustion chamber
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downstream of the compressor
Pregunta 3
Pregunta
A gas turbine performs most effectively if
Respuesta
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lube oil is of the proper viscosity
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cooling water temperature is kept low
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ambient air temperature is high
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ambient air temperature is low
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loaded immediately after starting
Pregunta 4
Pregunta
A combined steam and gas turbine arrangement can be termed
Respuesta
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an ideal system
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a cogeneration system
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a once through system
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ideal relative to system efficiency
-
a higher capacity system
Pregunta 5
Pregunta
The purpose of a regenerator is
Respuesta
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to clean the exhaust gases
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to improve the efficiency of the turbine
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to increase the temperature in the combustion chamber
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to lower the temperature in the combustion chamber
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to recirculate the exhaust gases back through the compressor
Pregunta 6
Pregunta
A __________ is suitable for use in unmanned and remote locations
Respuesta
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steam turbine plant
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cogeneration plant
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gas turbine system
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nuclear plant
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thermal generating plant
Pregunta 7
Pregunta
Gas turbine advantages include
1. high thermal efficiency
2. lower initial cost
3. quick start up
4. little cooling water requirements
5. power to mass ratio is high
6. remote operation
Respuesta
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1,2,3
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2,3,4,5,6
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1,2,4,6,
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1,3,4
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1,2,3,4,5,6
Pregunta 8
Pregunta
Disadvantages of a closed cycle gas turbine include:
1. higher initial cost
2. increased cooling water requirements
3. turbine blade fouling
4. they require more creep resistant material than open cycle turbines
Respuesta
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1,2
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2,3,4
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1,2,4
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1,2,3
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1,2,3,4
Pregunta 9
Pregunta
The output power on a gas turbine increases when its colder outside because
Respuesta
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cooling water requiremetns are lower
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colder air has the ability to hold more moisture
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higher compressor volumetric efficiency
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mass flow of the incoming air is greater
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all of the above
Pregunta 10
Pregunta
A ________ gas turbine system uses the same working fluid over and over again.
Respuesta
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open cycle
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dual shaft
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closed cycle
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regenerator
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emergency power
Pregunta 11
Pregunta
The major components of a gas turbine system include.
Respuesta
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low pressure compressor, turbine and duxt burner
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compressor, combustor and regenerator
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compressor, combustor and turbine
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starting motor, oil coolers and flux capacitor
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generator, compressor, turbine and combustor
Pregunta 12
Pregunta
Two stage compression is used in a gas turbine system to:
Respuesta
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increase turbine output
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reduce the size of the machine
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lower the amount of fuel consumed
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reduce maintenance costs
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increase the compressor life
Pregunta 13
Pregunta
A regenerator in a gas turbine cycle is located:
Respuesta
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between the combustor and the turbine
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between air compressor stages
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prior to air compression
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between the compressor and the combustor
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at the turbine outlet
Pregunta 14
Pregunta
A gas turbine is most efficient when
1. clean fuel is used
2. turbine blades are clean
3. gas path is clean
4. lubricating oil is clean
5. ambient air temp is low
6. operated at 1/2 load
Respuesta
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1,2,3,4,6
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1,2,3,4,5
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2,3,4,5,6
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1,3,5
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1,2,3,5
Pregunta 15
Pregunta
A gas turbine operatos on the:
Respuesta
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otto cycle
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Daltons law
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brayton cycle
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Charles law
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diesel
Pregunta 16
Pregunta
Remote gas turbines may be started by:
1. mechanical linkages
2. telephone
3. radio link
4. tiber relays
Respuesta
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2,3
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1,2
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3,4
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1,4
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2,4
Pregunta 17
Pregunta
In a total energy arrangement a gas turbine may exhaust its flue gas to
1.HRSG
2. waste heat boiler
3. atmosphere
4. SAGD
Respuesta
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1,2
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1,3
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2,4
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1,4
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1,2,4
Pregunta 18
Pregunta
A gas turbine may be used as a prime mover to operate:
Respuesta
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air compressors
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fire pumps
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generators
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emergency equipment
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all of the above
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