4678909
Descrição
Quiz por TRAVIS CANNING, atualizado more than 1 year ago
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Criado por TRAVIS CANNING
quase 9 anos atrás
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Questão 1
Questão
A cogeneration system incorporating a diverter valve uses this to do which of the following?
Responda
-
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
Questão 2
Questão
Which of the following is the first step in starting up a cogeneration system?
Responda
-
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
Questão 3
Questão
Water jackets used in a cogeneration system are used to serve which purpose?
Responda
-
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
Questão 4
Questão
Carbon dioxide, one of the most important parts of the combustion process is well known for which of the following?
Responda
-
Climatic change
-
Greenhouse effect
-
Acid rain
-
1 and 2
-
None of the above
Questão 5
Questão
The level of NOx emissions is dependant on which of the following?
Responda
-
Combustion chamber geometry
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Air/fuel mixture
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Pressure
-
Temperature
-
All of the above
Questão 6
Questão
The main application for a HRSG is to do which of the following?
Responda
-
Steam generation using gas turbine exhaust
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Steam generation using BFW
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Decrease the load on a single piece of equipment
-
All of the above
-
None of the above
Questão 7
Questão
A HRSG unit may include auxiliary or duct burners that are used to do which of the following?
Responda
-
Increase the production of steam
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Control the superheater temperatures
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Meet process steam temperature requirements
-
All of the above
-
None of the above
Questão 8
Questão
Low thermal requirements of a control system may occur during which of the following times?
Responda
-
During start-up
-
During times of low production
-
During times of low electrical requirements
-
All of the above
-
None of the above
Questão 9
Questão
A cogeneration system that is not connected to the electrical grid will do which of the following?
Responda
-
Supply all the electrical requirements at the site
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Supply emergency back up electrical requirements
-
Supply back up electrical requirements
-
All of the above
-
None of the above
Questão 10
Questão
The biggest advantages of a combined cycle power plant with a single- shaft gas/steam turbine arrangement are?
Responda
-
Highest level of thermal efficiency
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Extremely low capital cost
-
Short project and construction times
-
Low operation and maintenance costs
-
All of the above
Questão 11
Questão
Multi shaft combined- cycle power plants have high efficiency at base load operation.
Responda
- True
- False
Questão 12
Questão
The extra electricity produced by the combined cycle plant gives it which of the following advantages over the conventional steam generating plant?
Responda
-
Significant increase in thermal efficiency
-
Emissions to atmosphere are lower
-
Less fuel is needed
-
All of the above
-
None of the above
Questão 13
Questão
A fully- fired combined cycle cogeneration system may include which of the following?
Responda
-
Fired HRSG
-
Gas turbine
-
Steam turbine
-
Generators
-
All of the above
Questão 14
Questão
Combined cycle cogeneration refers to which of the following?
Responda
-
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
Questão 15
Questão
The acronym HRSG represents which of the following?
Responda
-
Hot reboiler steam generator
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Hot recovery steam generator
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Heat recovery steam generator
-
Heater reboiler steam generator
Questão 16
Questão
Cogeneration can increase the overall plant efficiency to a value between __ and __%?
Responda
-
30 and 40
-
40 and 60
-
40 and 50
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60 and 90
-
95 and 100
Questão 17
Questão
Various types of simple-cycle cogeneration plants include which of the following?
Responda
-
Waste heat cogeneration
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Heat engine cogeneration
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Back pressure steam turbine
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Gas turbine
-
All of the above
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