4688101
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace casi 9 años
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Pregunta 1
Pregunta
In the combustors of a gas turbine, how much air usually bypasses the combustion chambers:
Respuesta
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90%
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80%
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60%
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50%
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20%
Pregunta 2
Pregunta
The disadvantages of using a regenerator in a gas turbine cycle are:
1. Heating surfaces become coated and must be cleaned
2. Increased capital costs
3. It produces a pressure drop through the system
4. The temperature drop through the system will be reduced
Respuesta
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2,3
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1,2,4
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1,3,4
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2,3,4
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1,2,3,4
Pregunta 3
Pregunta
Maximum power achieved by a gas turbine as a function of
Respuesta
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The number of turbine stops and starts every year
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The number of times base load power output is exceeded
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The number of times peak load is obtained in a year
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The number of times operational limits are exceeded
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Life expectancy of hot gas components
Pregunta 4
Pregunta
The regenerator of a gas turbine cycle is a:
Respuesta
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second combustor
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heat exchanger
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Vessel used to transfer heat from the exhaust gas to the working fluid before compression occurs
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Increase the pressure of the working fluid in the system
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Increase the temperature of the combustor's outlet
Pregunta 5
Pregunta
The gas turbine system is ideal:
Respuesta
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For large generator systems
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To be used over a steam turbine
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To be used for unmanned and remote locations
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For all applications of a process plant
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For large gas plant
Pregunta 6
Pregunta
The advantages of a dual shaft gas turbine arrangement are:
1. Greater flexibility
2. It is cheaper
3. Smaller starting motors may be used
4. High pressures and temperatures may be obtained
Respuesta
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1,2
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1,3
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2,3
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2,4
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1,4
Pregunta 7
Pregunta
Control of a gas turbine is accomplished by:
Respuesta
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Varying the loading station
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The power turbine all speed governor
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Varying load on the generator
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Varying the fuel flow
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Controlling the shaft speed
Pregunta 8
Pregunta
The turbine exit gas temperatures will be a maximum of:
Respuesta
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600 deg C
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700 deg C
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750 deg C
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800 deg C
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850 deg C
Pregunta 9
Pregunta
Reducing gears are used with gas turbines to:
Respuesta
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Control the speed of the power turbine
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Drive slower lube oil pumps
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Reduce turbine speed before shutdown
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Achieve desired speed of the load
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Reduce horsepower requirements
Pregunta 10
Pregunta
A closed cycle gas turbine system
Respuesta
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Does not use a starting motor
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Has lower pressure used in system
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Will use the same working fluid over again
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Must use a cooler before the regeneration
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Has a lower initial cost than that of the open cycle gas turbine
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