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

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TRAVIS CANNING
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Power prep material

Power prep material

Question 1 of 27

1

The two classifications of steam turbines include:

Select one of the following:

  • induction and extraction

  • condensing and non-condensing

  • impulse and reaction

  • compound and cross-compound

  • all of the above

Explanation

Question 2 of 27

1

The two types of steam turbines include

Select one of the following:

  • induction and extraction

  • condensing and non-condensing

  • impulse and reaction

  • compound and cross-compound

  • all of the above

Explanation

Question 3 of 27

1

Impulse turbine blades

Select one of the following:

  • create considerable end thrust

  • convert heat energy into kinetic energy

  • are either bucket shape or nozzle shaped

  • convert kinetic energy into useful work

  • are typically used in the low pressure stages of a turbine

Explanation

Question 4 of 27

1

Reaction turbine blades

Select one of the following:

  • are nozzle shaped

  • are bucket shaped

  • are a combination of bucket and nozzle shaped

  • produce little end thrust

  • all of the above

Explanation

Question 5 of 27

1

The pressure remains constant across the moving blades of an impulse turbine

Select one of the following:

  • True
  • False

Explanation

Question 6 of 27

1

The force applied to the blade is caused by changing the direction of the stream flow in an impulse turbine

Select one of the following:

  • True
  • False

Explanation

Question 7 of 27

1

Steam pressure drops across the moving blades of an impulse turbine

Select one of the following:

  • True
  • False

Explanation

Question 8 of 27

1

In a reaction turbine the steam pressure drops in both the stationary and rotating blades

Select one of the following:

  • True
  • False

Explanation

Question 9 of 27

1

In a reaction turbine the steam expands in the moving blades producing a reaction force

Select one of the following:

  • True
  • False

Explanation

Question 10 of 27

1

In a reaction turbine the velocity of the steam decreases in the stationary and moving blades

Select one of the following:

  • True
  • False

Explanation

Question 11 of 27

1

In a reaction turbine blade clearance between the rotor and the casing must be kept at a maximum to prevent rubbing.

Select one of the following:

  • True
  • False

Explanation

Question 12 of 27

1

Nozzles are used on steam turbines to

Select one of the following:

  • reduce the steam velocity to the blading

  • increase the enthalpy of the incoming steam

  • prevent moisture from entering the low pressure stages of the turbine

  • convert heat energy into kinetic energy

  • convert pressure energy into potential energy

Explanation

Question 13 of 27

1

The throttling effect of steam through a turbine nozzle

Select one of the following:

  • increased superheat, reduces pressure and increases the steam volume

  • reduced superheat, increases pressure and increase the steam volume

  • no change in superheat, reduces pressure and increases the steam volume

  • increased superheat, increased pressure, increased volume

  • heat loss, enthalpy gain and increase in velocity

Explanation

Question 14 of 27

1

In which type of turbine does the steam pressure drop in the nozzle and then remain constant through both the stationary and moving blades:

Select one of the following:

  • pressure compounding impulse turbine

  • reaction turbine

  • velocity compounded impulse turbine

  • non-condensing impulse turbine

  • none of the above

Explanation

Question 15 of 27

1

Steam velocity, blade velocity may be reduced in a multistage impulse turbine by:
1. Reducing turbine vacuum
2. pressure compounding
3. increasing blading length
4. velocity compounding

Select one of the following:

  • 1,2

  • 2,3

  • 1,3

  • 2,4

  • 3,4

Explanation

Question 16 of 27

1

Compounding steam turbines is used primarily to:
1. counteract axial thrust
2. reduce turbine rotor speed
3. Reduce friction losses
4. reduce turbine blade erosion
5. reduce turbine noise

Select one of the following:

  • 1,3,5

  • 2,3,4

  • 2,3

  • 1,2,3,4,5

  • 2,4

Explanation

Question 17 of 27

1

A dummy piston with balance pipe is used primarily on reaction turbines to:

Select one of the following:

  • reduce the clearance space between the blade tip and the casing

  • reduce turbine vibration

  • eliminate the use of a thrust bearing

  • offset the end thrust produced

  • none of the above

Explanation

Question 18 of 27

1

A turbine thrust bearing is typically lined with a soft metal known as

Select one of the following:

  • brass

  • babbit

  • lead

  • carbon

  • inconel

Explanation

Question 19 of 27

1

The purpose of a thrust bearing on a steam turbine is to:
1. Absorb rotor axial thrust
2. Reduce turbine vibration
3. Prevent steam leakage
4. Reduce steam velocity
5. keep the rotor in place within the casing

Select one of the following:

  • 1,2,5

  • 1,2,3,4

  • 2,3,4,5

  • 1,2,3,4,5

  • 1,5

Explanation

Question 20 of 27

1

Different types of steam turbine plants may be classified as:

Select one of the following:

  • impulse and reaction

  • compound and cross compound

  • condensing and non-condensing

  • SAGD and HRSG

  • Steam turbine and gas turbine

Explanation

Question 21 of 27

1

In addition to having a high thermal cycle efficiency, condensing steam plants have the following advantage.

Select one of the following:

  • a large amount of cooling water is required

  • low initial cost

  • little space is required

  • recovery of condensate is possible

  • all of the above

Explanation

Question 22 of 27

1

This type of turbine acts like a pressure reducing valve.

Select one of the following:

  • Back pressure Turbine

  • Rateau Turbine

  • Extraction turbine

  • Induction turbine

  • Cross-compound Turbine

Explanation

Question 23 of 27

1

This type of steam turbine has a better overall efficiency than a purely condensing steam turbine.

Select one of the following:

  • gas turbine

  • cross-compounded

  • tandem double-flow

  • bleeder turbine

  • none of the above

Explanation

Question 24 of 27

1

Another name for a condensing bleeder turbine would be referred to as

Select one of the following:

  • induction turbine

  • closed cycle steam turbine

  • extraction turbine

  • topping turbine

  • back pressure turbine

Explanation

Question 25 of 27

1

This type of turbine allows new high pressure boilers to provide steam to old lower pressure systems and could also be the back pressure turbine of a cross compound system

Select one of the following:

  • governing turbine

  • topping turbine

  • induction/extraction turbine

  • condensing turbine

  • reducing station turbine

Explanation

Question 26 of 27

1

The purpose of a coupling on a turbine is to:

Select one of the following:

  • A) compensate for axial expansion and contraction of the rotor

  • B) transmit power from one shaft to the other

  • C) keep the shaft from vibrating

  • D) both a and b

  • E) all of the above

Explanation

Question 27 of 27

1

The following pump is utilized on a turbine rotor while on barring gear to prevent rubbing inside the bearings

Select one of the following:

  • lifting oil pump

  • boilerfeed pump

  • hydraulic oil pump

  • jacking oil pump

Explanation

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