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for everyone quiz 3

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power engineering 3b2 Quiz on for everyone quiz 3, created by TRAVIS CANNING on 28/02/2016.
TRAVIS CANNING
Quiz by TRAVIS CANNING, updated more than 1 year ago
TRAVIS CANNING
Created by TRAVIS CANNING about 8 years ago
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Resource summary

Question 1

Question
A cogeneration system incorporating a diverter valve uses this to do which of the following?
Answer
  • 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

Question 2

Question
Which of the following is the first step in starting up a cogeneration system?
Answer
  • 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

Question 3

Question
Water jackets used in a cogeneration system are used to serve which purpose?
Answer
  • 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

Question 4

Question
Carbon dioxide, one of the most important parts of the combustion process is well known for which of the following?
Answer
  • Climatic change
  • Greenhouse effect
  • Acid rain
  • 1 and 2
  • None of the above

Question 5

Question
The level of NOx emissions is dependant on which of the following?
Answer
  • Combustion chamber geometry
  • Air/fuel mixture
  • Pressure
  • Temperature
  • All of the above

Question 6

Question
The main application for a HRSG is to do which of the following?
Answer
  • 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

Question 7

Question
A HRSG unit may include auxiliary or duct burners that are used to do which of the following?
Answer
  • Increase the production of steam
  • Control the superheater temperatures
  • Meet process steam temperature requirements
  • All of the above
  • None of the above

Question 8

Question
Low thermal requirements of a control system may occur during which of the following times?
Answer
  • During start-up
  • During times of low production
  • During times of low electrical requirements
  • All of the above
  • None of the above

Question 9

Question
A cogeneration system that is not connected to the electrical grid will do which of the following?
Answer
  • 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

Question 10

Question
The biggest advantages of a combined cycle power plant with a single- shaft gas/steam turbine arrangement are?
Answer
  • Highest level of thermal efficiency
  • Extremely low capital cost
  • Short project and construction times
  • Low operation and maintenance costs
  • All of the above

Question 11

Question
Multi shaft combined- cycle power plants have high efficiency at base load operation.
Answer
  • True
  • False

Question 12

Question
The extra electricity produced by the combined cycle plant gives it which of the following advantages over the conventional steam generating plant?
Answer
  • Significant increase in thermal efficiency
  • Emissions to atmosphere are lower
  • Less fuel is needed
  • All of the above
  • None of the above

Question 13

Question
A fully- fired combined cycle cogeneration system may include which of the following?
Answer
  • Fired HRSG
  • Gas turbine
  • Steam turbine
  • Generators
  • All of the above

Question 14

Question
Combined cycle cogeneration refers to which of the following?
Answer
  • 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

Question 15

Question
The acronym HRSG represents which of the following?
Answer
  • Hot reboiler steam generator
  • Hot recovery steam generator
  • Heat recovery steam generator
  • Heater reboiler steam generator

Question 16

Question
Cogeneration can increase the overall plant efficiency to a value between __ and __%?
Answer
  • 30 and 40
  • 40 and 60
  • 40 and 50
  • 60 and 90
  • 95 and 100

Question 17

Question
Various types of simple-cycle cogeneration plants include which of the following?
Answer
  • Waste heat cogeneration
  • Heat engine cogeneration
  • Back pressure steam turbine
  • Gas turbine
  • All of the above
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