TRAVIS CANNING
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power engineering 3b2 Quiz on power prep quiz 5, created by TRAVIS CANNING on 27/02/2016.

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TRAVIS CANNING
Created by TRAVIS CANNING about 8 years ago
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power prep quiz 5

Question 1 of 11

1

A gas turbine compressor is usually

Select one of the following:

  • centrifugal type

  • downstream of the turbine

  • dynamic axial design

  • downstream of the combustor

  • driven by a motor

Explanation

Question 2 of 11

1

The compressor on the gas turbine

Select one of the following:

  • can be driven by the load turbine

  • is always of the axial type

  • is always a multi-staged compressor

  • is always independently driven

  • is always a reciprocating type

Explanation

Question 3 of 11

1

The combustion chamber of a gas turbine

Select one of the following:

  • increases the pressure of the compressed air

  • is heated between the load turbine and the compression turbine

  • burns fuel with excess air

  • is water cooled

  • rotates at shaft speed

Explanation

Question 4 of 11

1

Many typical steam plant auxiliaries are eliminated with a gas turbine due to its

Select one of the following:

  • small size

  • high speed

  • high power to weight ratio

  • simplicity

  • low oil consumption

Explanation

Question 5 of 11

1

Gas turbines are very popular where

Select one of the following:

  • noise does not present a problem

  • water is scarce

  • industrial sites are small and in congested areas

  • thermal pollution is of major concern

  • natural gas is plentiful

Explanation

Question 6 of 11

1

gas turbines are ideal when considering

Select one of the following:

  • long warm-up periods

  • emergency power generation

  • automotive power

  • cooling water pump operation

  • good thermal efficiency

Explanation

Question 7 of 11

1

A two shaft gas turbine

Select one of the following:

  • has the load turbine downstream from the compressor turbine

  • has the first turbine drive the prop on a turbo-prop engine

  • is always an open cycle type

  • is always a closed cycle type

  • does not require a starting motor

Explanation

Question 8 of 11

1

A gas turbine is not self-starting. It must be rotated at _________ of its maximum speed before fuel is turned on

Select one of the following:

  • 10% to 30 %

  • 15% to 30 %

  • 20% to 30 %

  • 25% to 30 %

  • 25% to 50%

Explanation

Question 9 of 11

1

Early gas turbines were handicapped by

Select one of the following:

  • metal not being able to withstand high speed centrifugal forces

  • the inability to get enough air into the combustion chamber

  • metals not standing the high temperatures involved

  • their high operating speeds

  • their inadequate power capability

Explanation

Question 10 of 11

1

The temperature to which the air can be raised at the turbine inlet is

Select one of the following:

  • an indication of a units power

  • directly related to the units size

  • a function of the air compressor input

  • an indication of the units efficiency

  • important for proper compressor performance

Explanation

Question 11 of 11

1

The low installation cost of a gas turbine is

Select one of the following:

  • due to cheap materials in the blades

  • due to short fuel lines

  • because no fuel pump is required

  • because no electrical wiring is required

  • because less auxillary equipment is needed

Explanation

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