4688101
Description
Quiz by TRAVIS CANNING, updated more than 1 year ago
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Created by TRAVIS CANNING
about 8 years ago
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Question 1
Question
In the combustors of a gas turbine, how much air usually bypasses the combustion chambers:
Answer
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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%
Question 2
Question
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
Answer
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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
Question 3
Question
Maximum power achieved by a gas turbine as a function of
Answer
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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
Question 4
Question
The regenerator of a gas turbine cycle is a:
Answer
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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
Question 5
Question
The gas turbine system is ideal:
Answer
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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
Question 6
Question
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
Answer
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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
Question 7
Question
Control of a gas turbine is accomplished by:
Answer
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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
Question 8
Question
The turbine exit gas temperatures will be a maximum of:
Answer
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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
Question 9
Question
Reducing gears are used with gas turbines to:
Answer
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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
Question 10
Question
A closed cycle gas turbine system
Answer
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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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