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Quiz von TRAVIS CANNING, aktualisiert more than 1 year ago
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Erstellt von TRAVIS CANNING
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Frage 1
Frage
A cogeneration system incorporating a diverter valve uses this to do which of the following?
Antworten
-
Allow combustion gases to enter the HRSG
-
Allow steam entering into the steam turbine
-
Expel the combustion gases back into the turbine
-
All of the above
-
None of the above
Frage 2
Frage
Which of the following is the first step in starting up a cogeneration system?
Antworten
-
The gearbox will engage the starting motor
-
Turbine is rotated to about 55% of rated speed
-
Diverter valve will open to atmosphere
-
Operator initiates a turbine start up from the control room
-
None of the above
Frage 3
Frage
Water jackets used in a cogeneration system are used to serve which purpose?
Antworten
-
Recover the heat produced to cool the engine
-
Cool the air surrounding the engine
-
Cool the lubricating oil of the engine
-
All of the above
-
None of the above
Frage 4
Frage
Carbon dioxide, one of the most important parts of the combustion process is well known for which of the following?
Antworten
-
Climatic change
-
Greenhouse effect
-
Acid rain
-
1 and 2
-
None of the above
Frage 5
Frage
The level of NOx emissions is dependant on which of the following?
Antworten
-
Combustion chamber geometry
-
Air/fuel mixture
-
Pressure
-
Temperature
-
All of the above
Frage 6
Frage
The main application for a HRSG is to do which of the following?
Antworten
-
Steam generation using gas turbine exhaust
-
Steam generation using BFW
-
Decrease the load on a single piece of equipment
-
All of the above
-
None of the above
Frage 7
Frage
A HRSG unit may include auxiliary or duct burners that are used to do which of the following?
Antworten
-
Increase the production of steam
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Control the superheater temperatures
-
Meet process steam temperature requirements
-
All of the above
-
None of the above
Frage 8
Frage
Low thermal requirements of a control system may occur during which of the following times?
Antworten
-
During start-up
-
During times of low production
-
During times of low electrical requirements
-
All of the above
-
None of the above
Frage 9
Frage
A cogeneration system that is not connected to the electrical grid will do which of the following?
Antworten
-
Supply all the electrical requirements at the site
-
Supply emergency back up electrical requirements
-
Supply back up electrical requirements
-
All of the above
-
None of the above
Frage 10
Frage
The biggest advantages of a combined cycle power plant with a single- shaft gas/steam turbine arrangement are?
Antworten
-
Highest level of thermal efficiency
-
Extremely low capital cost
-
Short project and construction times
-
Low operation and maintenance costs
-
All of the above
Frage 11
Frage
Multi shaft combined- cycle power plants have high efficiency at base load operation.
Antworten
- True
- False
Frage 12
Frage
The extra electricity produced by the combined cycle plant gives it which of the following advantages over the conventional steam generating plant?
Antworten
-
Significant increase in thermal efficiency
-
Emissions to atmosphere are lower
-
Less fuel is needed
-
All of the above
-
None of the above
Frage 13
Frage
A fully- fired combined cycle cogeneration system may include which of the following?
Antworten
-
Fired HRSG
-
Gas turbine
-
Steam turbine
-
Generators
-
All of the above
Frage 14
Frage
Combined cycle cogeneration refers to which of the following?
Antworten
-
Production of electricity from two sources utilizing one fuel source
-
Production of electricity from one source utilizing two fuel sources
-
Production of electricity from one source utilizing only a single fuel source
-
All of the above
-
None of the above
Frage 15
Frage
The acronym HRSG represents which of the following?
Antworten
-
Hot reboiler steam generator
-
Hot recovery steam generator
-
Heat recovery steam generator
-
Heater reboiler steam generator
Frage 16
Frage
Cogeneration can increase the overall plant efficiency to a value between __ and __%?
Antworten
-
30 and 40
-
40 and 60
-
40 and 50
-
60 and 90
-
95 and 100
Frage 17
Frage
Various types of simple-cycle cogeneration plants include which of the following?
Antworten
-
Waste heat cogeneration
-
Heat engine cogeneration
-
Back pressure steam turbine
-
Gas turbine
-
All of the above
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