TRAVIS CANNING
Quiz by , created more than 1 year ago

power engineering 3b2 Quiz on for everyone quiz 3, created by TRAVIS CANNING on 28/02/2016.

8
1
0
TRAVIS CANNING
Created by TRAVIS CANNING almost 9 years ago
Close

for everyone quiz 3

for everyone quiz 3

Question 1 of 17

1

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

Select one of the following:

  • 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

Explanation

Question 2 of 17

1

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

Select one of the following:

  • 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

Explanation

Question 3 of 17

1

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

Select one of the following:

  • 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

Explanation

Question 4 of 17

1

Carbon dioxide, one of the most important parts of the combustion process is well known for which of the following?

Select one of the following:

  • Climatic change

  • Greenhouse effect

  • Acid rain

  • 1 and 2

  • None of the above

Explanation

Question 5 of 17

1

The level of NOx emissions is dependant on which of the following?

Select one of the following:

  • Combustion chamber geometry

  • Air/fuel mixture

  • Pressure

  • Temperature

  • All of the above

Explanation

Question 6 of 17

1

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

Select one of the following:

  • 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

Explanation

Question 7 of 17

1

A HRSG unit may include auxiliary or duct burners that are used to do which of the following?

Select one of the following:

  • Increase the production of steam

  • Control the superheater temperatures

  • Meet process steam temperature requirements

  • All of the above

  • None of the above

Explanation

Question 8 of 17

1

Low thermal requirements of a control system may occur during which of the following times?

Select one of the following:

  • During start-up

  • During times of low production

  • During times of low electrical requirements

  • All of the above

  • None of the above

Explanation

Question 9 of 17

1

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

Select one of the following:

  • 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

Explanation

Question 10 of 17

1

The biggest advantages of a combined cycle power plant with a single- shaft gas/steam turbine arrangement are?

Select one of the following:

  • Highest level of thermal efficiency

  • Extremely low capital cost

  • Short project and construction times

  • Low operation and maintenance costs

  • All of the above

Explanation

Question 11 of 17

1

Multi shaft combined- cycle power plants have high efficiency at base load operation.

Select one of the following:

  • True
  • False

Explanation

Question 12 of 17

1

The extra electricity produced by the combined cycle plant gives it which of the following advantages over the conventional steam generating plant?

Select one of the following:

  • Significant increase in thermal efficiency

  • Emissions to atmosphere are lower

  • Less fuel is needed

  • All of the above

  • None of the above

Explanation

Question 13 of 17

1

A fully- fired combined cycle cogeneration system may include which of the following?

Select one of the following:

  • Fired HRSG

  • Gas turbine

  • Steam turbine

  • Generators

  • All of the above

Explanation

Question 14 of 17

1

Combined cycle cogeneration refers to which of the following?

Select one of the following:

  • 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

Explanation

Question 15 of 17

1

The acronym HRSG represents which of the following?

Select one of the following:

  • Hot reboiler steam generator

  • Hot recovery steam generator

  • Heat recovery steam generator

  • Heater reboiler steam generator

Explanation

Question 16 of 17

1

Cogeneration can increase the overall plant efficiency to a value between __ and __%?

Select one of the following:

  • 30 and 40

  • 40 and 60

  • 40 and 50

  • 60 and 90

  • 95 and 100

Explanation

Question 17 of 17

1

Various types of simple-cycle cogeneration plants include which of the following?

Select one of the following:

  • Waste heat cogeneration

  • Heat engine cogeneration

  • Back pressure steam turbine

  • Gas turbine

  • All of the above

Explanation

Previous
Next