Class Flashcards

(36 cards)

1
Q

A governor by definition is

A

An automatic attachment for controlling speed

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2
Q

A governor by definition is

A

An automatic attachment for controlling speed

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3
Q

When a governor regulates a turbine by itself in isochronous form, it has speed droop true or false

A

False

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4
Q

Name four parts of a simple governor

A

Bald head, pilot and relay valve, servo motor, restoring mechanism

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5
Q

Name four parts of a simple governor

A

Bald head, pilot and relay valve, servo motor, restoring mechanism

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6
Q

What is the function of the pilot valve?

A

The function of the pilot valve is to provide hydraulic force that operates the relay valve

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7
Q

From which device does the governor get its sensitivity from?

A

The flyball

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8
Q

Which device is used to achieve stability within the governor system?

A

The compensating dashpot is used to achieve stability

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9
Q

Which device is used to achieve stability within the governor system?

A

The compensating dashpot is used to achieve stability

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10
Q

A generator with 5% speed droop applied senses a change in load true or false

A

True

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11
Q

A compensating dash pot has two pistons and

A

A needle valve

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12
Q

What is the function of the vibrating discs on the governor?

A

To reduce the sticking of the pilot valve and provide more sensitivity

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13
Q

Name four safety devices on the generator

A

The over speed device, low oil, pressure, switch, nozzle, deflectors, broken belt device

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14
Q

The auxiliary valve is used to

A

Manually operate the servo motor

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15
Q

What is the function of the restoring mechanism on the governor?

A

To re-center the pilot valve in its neutral position

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16
Q

What is the function of a permanent magnet generator on the turbine?

A

To supply electrical power to operate the ball head motor

17
Q

Where is the speeder spring located on the governor?

A

It is located next to the fly ball

18
Q

What is the function of the gate limit device?

A

D all of the above

19
Q

the Gov ball head has to spin at the same speed as the PMG. True or false

20
Q

The relay valve is positioned or operated by

A

The pilot valve

21
Q

What are the principle parts of a governor oil system?

A

Reservoir, accumulator, pump, and piping system

22
Q

The auxiliary valve provides control to the servo motor during these times

A

For maintenance purposes

23
Q

If a load on the turbine suddenly is rejected the ball head will

A

Increase speed immediately

24
Q

If load on the turbine suddenly increases, what will the floating lever do?

A

The upper floating lever will rise up

25
The restoring mechanism transmits the amount and direction back to the governor control pilot valve until
The ports are closed or re-centered
26
What is forced downward to unentered the pilot valve?
The speeder rod
27
What is four indications of dirty governor oil
A dirty filter, varnish, dark color, sludge
28
What are four desirable oil qualities for a governor?
Good lubricating quality, dissipates in trapped air, does not precipitate solids nor breaks down
29
What are four desirable oil qualities for a governor?
Good lubricating quality, dissipates in trapped air, does not precipitate solids nor breaks down
30
The ball head is connected to the relay valve true or false
False
31
The dash pot needle is a means of adjustment to the wikit kits true or false
False
32
The over speed device operates the shut down, solenoid, true or false
True
33
The over speed device operates the shut down, solenoid, true or false
True
34
The servo motor is a single acting cylinder that operates the wicked gates true or false
False it is a double acting cylinder
35
On the restoring mechanism levers all of the fulcrum are not a fixed point true or false
True
36
If the dash pot is adjusted to give too much compensation to the governor, it becomes sluggish, true or false
True