TRAVIS CANNING
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power engineering 3b2 Quiz on Power prep quiz 7, created by TRAVIS CANNING on 28/02/2016.

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TRAVIS CANNING
Created by TRAVIS CANNING about 8 years ago
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Power prep quiz 7

Question 1 of 22

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 cabability

Explanation

Question 2 of 22

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 unit's size

  • a function of the air compressor input

  • an indication of the units efficiency

  • improper for proper compressor performance

Explanation

Question 3 of 22

1

The output power of a gas turbine is directly related to the

Select one of the following:

  • mass of gas passing though the turbine per second

  • temperate at the turbine inlet

  • mass of the unit

  • slippage between the turbine and compressor

  • turbine exhaust temperature

Explanation

Question 4 of 22

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

Question 5 of 22

1

Some of the characteristics which make the gas turbine a better choice over other prime movers are
1. Low maintenance
2. Minimal cooling water
3. high thermal efficiency
4. rapid start-up and loading

Select one of the following:

  • 1,2,3,4

  • 1,2,3

  • 1,2,4

  • 1,3,4

  • 2,3,4

Explanation

Question 6 of 22

1

The air side of a gas turbine regenerator is located

Select one of the following:

  • before the compressor

  • after the combustion chamber

  • between the turbine and the combustion chamber

  • between the turbine and atmosphere

  • downstream of the compressor

Explanation

Question 7 of 22

1

A gas turbine performs most effectively if

Select one of the following:

  • lube oil is of the proper viscosity

  • cooling water temperature is kept low

  • ambient air temperature is high

  • ambient air temperature is low

  • loaded immediately after starting

Explanation

Question 8 of 22

1

A combined steam and gas turbine arrangement can be termed

Select one of the following:

  • an ideal system

  • a cogeneration system

  • a once through system

  • ideal relative to system efficiency

  • a high capacity system

Explanation

Question 9 of 22

1

The purpose of a regenerator is

Select one of the following:

  • to clean the exhaust gases

  • to improve the efficiency of the turbine

  • to increase the temperature in the combustion chamber

  • to lower the temperature in the combustion chamber

  • to recirculate the exhaust gases back through the compressor

Explanation

Question 10 of 22

1

A _________ is suitable for use in the unmanned and remote locations

Select one of the following:

  • steam turbine plant

  • cogeneration plant

  • gas turbine system

  • nuclear plant

  • thermal generating plant

Explanation

Question 11 of 22

1

Gas turbine advantages include:

1. high thermal efficiency 2. lower initial cost
3. quick start-up 4. little cooling water requirements
5. power to mass ratio is high 6. remote operation

Select one of the following:

  • 1,2,3

  • 2,3,4,5,6

  • 1,2,4,6

  • 1,3,4

  • 1,2,3,4,5,6

Explanation

Question 12 of 22

1

Disadvantages of a closed cycle gas turbine include:
1. higher initial cost
2. increased cooling water requirements
3. turbine blade fouling
4. they require more creep resistant material than open cycle turbines

Select one of the following:

  • 1,2

  • 2,3,4

  • 1,2,4

  • 1,2,3

  • 1,2,3,4

Explanation

Question 13 of 22

1

The output power on a gas turbine increases when its colder outside because:

Select one of the following:

  • cooling water requirements are lower

  • colder air has the ability to hold more moisture

  • higher compressor volumetric efficiency

  • mass flow of the incoming air is greater

  • all of the above

Explanation

Question 14 of 22

1

A ________ gas turbine system uses the same working fluid over and over again

Select one of the following:

  • open cycle

  • dual shaft

  • closed cycle

  • regenerator

  • emergency power

Explanation

Question 15 of 22

1

The major components of a gas turbine system include

Select one of the following:

  • low pressure compressor, turbine and duxt burner

  • compressor, combustor and regenerator

  • compressor, combustor and turbine

  • starting motor, oil coolers and flux capacitor

  • generator, compressor, turbine and combustor

Explanation

Question 16 of 22

1

Two stage compression is used in a gas turbine system to:

Select one of the following:

  • increased turbine output

  • reduce the size of the machine

  • lower the amount of fuel consumed

  • reduce maintenance costs

  • increase the compressor life

Explanation

Question 17 of 22

1

A regenerator in a gas turbine cycle is located:

Select one of the following:

  • between the combustor and the turbine

  • between the compressor stages

  • prior to air compression

  • between the compressor and the combustor

  • at the turbine outlet

Explanation

Question 18 of 22

1

A gas turbine is most efficient when:
1. clean fuel is used 2. turbine blades are clean
3. gas path is clean 4. lubricating oil is clean
5. ambient air temp is low 6. operated at 1/2 load

Select one of the following:

  • 1,2,3,4,6

  • 1,2,3,4,5

  • 2,3,4,5,6

  • 1,3,5

  • 1,2,3,5

Explanation

Question 19 of 22

1

A gas turbine operates on the

Select one of the following:

  • otto cycle

  • daltons law

  • brayton cycle

  • Charles law

  • diesel

Explanation

Question 20 of 22

1

Remote gas turbines may be started by:
1. mechanical linkages 2. telephone
3. radio link 4. timer relays

Select one of the following:

  • 2,3

  • 1,2

  • 3,4

  • 1,4

  • 2,4

Explanation

Question 21 of 22

1

In a total energy arrangement a gas turbine may exhaust its flue gas to:
1. HRSG 2. waste heat boiler 3. atmosphere 4. SAGD

Select one of the following:

  • 1,2

  • 1,3

  • 2,4

  • 1,4

  • 1,2,4

Explanation

Question 22 of 22

1

A gas turbine may be used as a prime mover to operate:

Select one of the following:

  • air compressors

  • fire pumps

  • generators

  • emergency equipment

  • all of the above

Explanation

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