TRAVIS CANNING
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power engineering 3b2 Quiz on 4.4 Gas Turbine Principles and Design, created by TRAVIS CANNING on 29/02/2016.

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TRAVIS CANNING
Created by TRAVIS CANNING about 8 years ago
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4.4 Gas Turbine Principles and Design

Question 1 of 10

1

In the combustors of a gas turbine, how much air usually bypasses the combustion chambers:

Select one of the following:

  • 90%

  • 80%

  • 60%

  • 50%

  • 20%

Explanation

Question 2 of 10

1

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

Select one of the following:

  • 2,3

  • 1,2,4

  • 1,3,4

  • 2,3,4

  • 1,2,3,4

Explanation

Question 3 of 10

1

Maximum power achieved by a gas turbine as a function of

Select one of the following:

  • The number of turbine stops and starts every year

  • The number of times base load power output is exceeded

  • The number of times peak load is obtained in a year

  • The number of times operational limits are exceeded

  • Life expectancy of hot gas components

Explanation

Question 4 of 10

1

The regenerator of a gas turbine cycle is a:

Select one of the following:

  • second combustor

  • heat exchanger

  • Vessel used to transfer heat from the exhaust gas to the working fluid before compression occurs

  • Increase the pressure of the working fluid in the system

  • Increase the temperature of the combustor's outlet

Explanation

Question 5 of 10

1

The gas turbine system is ideal:

Select one of the following:

  • For large generator systems

  • To be used over a steam turbine

  • To be used for unmanned and remote locations

  • For all applications of a process plant

  • For large gas plant

Explanation

Question 6 of 10

1

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

Select one of the following:

  • 1,2

  • 1,3

  • 2,3

  • 2,4

  • 1,4

Explanation

Question 7 of 10

1

Control of a gas turbine is accomplished by:

Select one of the following:

  • Varying the loading station

  • The power turbine all speed governor

  • Varying load on the generator

  • Varying the fuel flow

  • Controlling the shaft speed

Explanation

Question 8 of 10

1

The turbine exit gas temperatures will be a maximum of:

Select one of the following:

  • 600 deg C

  • 700 deg C

  • 750 deg C

  • 800 deg C

  • 850 deg C

Explanation

Question 9 of 10

1

Reducing gears are used with gas turbines to:

Select one of the following:

  • Control the speed of the power turbine

  • Drive slower lube oil pumps

  • Reduce turbine speed before shutdown

  • Achieve desired speed of the load

  • Reduce horsepower requirements

Explanation

Question 10 of 10

1

A closed cycle gas turbine system

Select one of the following:

  • Does not use a starting motor

  • Has lower pressure used in system

  • Will use the same working fluid over again

  • Must use a cooler before the regeneration

  • Has a lower initial cost than that of the open cycle gas turbine

Explanation

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