4671012
Description
Quiz by TRAVIS CANNING, updated more than 1 year ago
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Created by TRAVIS CANNING
over 8 years ago
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Question 1
Question
A gas turbine compressor is usually
Answer
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centrifugal type
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downstream of the turbine
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dynamic axial design
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downstream of the combustor
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driven by a motor
Question 2
Question
The compressor on the gas turbine
Answer
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can be driven by the load turbine
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is always of the axial type
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is always a multi-staged compressor
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is always independently driven
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is always a reciprocating type
Question 3
Question
The combustion chamber of a gas turbine
Answer
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increases the pressure of the compressed air
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is heated between the load turbine and the compression turbine
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burns fuel with excess air
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is water cooled
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rotates at shaft speed
Question 4
Question
Many typical steam plant auxiliaries are eliminated with a gas turbine due to its
Answer
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small size
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high speed
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high power to weight ratio
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simplicity
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low oil consumption
Question 5
Question
Gas turbines are very popular where
Answer
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noise does not present a problem
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water is scarce
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industrial sites are small and in congested areas
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thermal pollution is of major concern
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natural gas is plentiful
Question 6
Question
gas turbines are ideal when considering
Answer
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long warm-up periods
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emergency power generation
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automotive power
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cooling water pump operation
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good thermal efficiency
Question 7
Question
A two shaft gas turbine
Answer
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has the load turbine downstream from the compressor turbine
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has the first turbine drive the prop on a turbo-prop engine
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is always an open cycle type
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is always a closed cycle type
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does not require a starting motor
Question 8
Question
A gas turbine is not self-starting. It must be rotated at _________ of its maximum speed before fuel is turned on
Answer
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10% to 30 %
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15% to 30 %
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20% to 30 %
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25% to 30 %
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25% to 50%
Question 9
Question
Early gas turbines were handicapped by
Answer
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metal not being able to withstand high speed centrifugal forces
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the inability to get enough air into the combustion chamber
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metals not standing the high temperatures involved
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their high operating speeds
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their inadequate power capability
Question 10
Question
The temperature to which the air can be raised at the turbine inlet is
Answer
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an indication of a units power
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directly related to the units size
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a function of the air compressor input
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an indication of the units efficiency
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important for proper compressor performance
Question 11
Question
The low installation cost of a gas turbine is
Answer
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due to cheap materials in the blades
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due to short fuel lines
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because no fuel pump is required
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because no electrical wiring is required
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because less auxillary equipment is needed
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