Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Systems > Control Oil (CO) > Flashcards

Control Oil (CO) Flashcards

1
Q

What does the Hydraulic Fluid Reservoir provide ?

A

Stores & supplies control oil for system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How is temperature maintained in the Hydraulic Reservoir ?

A

Two electric heater fan units for Hydraulic Fluid Temperature Control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

When are the Hydraulic Heater Fans turned on ?

A

Operated automatically by temperature controller to maintain >85F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What do the reservoirs Temperature Indicating Controllers do ? What is the temperature of the Hydraulic fluid returning to reservoir ?

A

-Control position of Hydraulic Fluid Cooler Inlet Valves
-Hydraulic Fluid returning is approx. 115F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which pump is used to drain & fill reservoir ? Where is the Hydraulic Oil pumped from to fill reservoir ?

A

-Hydraulic Fluid Filtering pump
-Pumped from 55 Gallon Hydraulic Barrels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is reservoir level normally maintained at ?

A

Maintained between -2” to +2”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What must be done to the 55 gallon barrel before adding it to reservoir ?

A

Barrel must be heated by a strap-on wrap-around heaters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

When do the Reservoir Heater & Fans energize when in auto ?

A

-Heaters & fans energize when temperature drops below 85F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When do the Heaters & fans denergize when switch is in auto ?

A

-Heater denergize when reservoir temperature reaches 85F
-Fans will run for 10 minutes to cool heaters once temperate reaches 85

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What happens when you take the Heater & Fan switch to the start position ?

A

Fans will start, but the heaters won’t start regardless of temperate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the Reservoir Air Dryer used for ?

A

Removes moisture from air breathed by Hydraulic Fluid Reservoir during power operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How does Reservoir Air Dryer work?

A

It uses a Alumina desiccant to remove moisture from reservoir

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does the Stealth Control Oil Reservoir Conditioner/Dryer do?

A

Injects .2 SCFM of air from instrument air into air dryer to blanket reservoir to exclude moisture & contaminants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What indications do you have on the pre filter indications for the air dryer supplying air to blanket reservoir ?

A

Green-less than 15psid
Orange-greater or equal to 15psid
Red-greater or equal to 25psid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What do the Hydraulic Fluid Pumps maintain Control Oil System pressure at ?

A

Maintains 1600psig for use of Stop Valves, Control Valves, & Combined Intermediate Valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Where are the Main Hydraulic powered from ?

A

Powered 480Load center (NG)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How does the Main Hydraulic Pumps maintain constant system pressure ?

A

Pump varies its stroke to meet demand & constant pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What does the Auxiliary pump do ?

A

Takes suction from Control Oil Reservoir to cool & lubricate main Hydraulic Fluid Pump

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Where is the Auxiliary Pump mounted to ?

A

Mounted into Main Pump housing & is driven by Main Hydraulic Pump Shaft

20
Q

What’re the three indication for the suction strainer for Main Hydrulic pump & Aux pump ?

A

-Filter clean
-Needs cleaning
- Bypassing

21
Q

What is the automatic bleed valve used for at the discharge of the Hydraulic pump ?

A

-Allows rapid full pressure starts after a strainer has been cleaned
-Bleed Valve discharges to reservoir

22
Q

Where does the pressure relief valve discharge to at the discharge of the Main Hydraulic Pump ?

A

Routed back to reservoir

23
Q

What happens when you get high DP on the Main Hydraulic Discharge Filters

A
24
Q

What’re the Fluid Accumulators used for ?

A

-Reservoir supply line during turbine load transients that can cause rapid movement of steam admission valves
-Provide immediate 200% reserve fluid for transient requirements

25
Q

How are the 4 Accumulators aligned ?

A

They’re aligned in parallel on common discharge header

26
Q

What’re the Fluid Accumulators precharged with ?

A

Precharged with 1000psig of nitrogen

27
Q

What do the Hydraulic Fluid Oil Coolers do ? How many are there ?

A

-Cools Control Oil returning from steam admission valves
-There is two 100% capacity Fluid Oil Coolers

28
Q

How’re the Hydraulic Fluid Oil Cooleds aligned ?

A

They’re aligned in parallel with normally one in service

29
Q

How is the Turbine Cooling Water inlet flow regulated ?

A

Temperature control valve is controlled by temperature controller to maintain temp. between 110-125

30
Q

What’re the Fullers Earth Filters used for ?

A

-Maintains control oil pH by absorbing water
-Maintains chlorine content of control oil within specifications

31
Q

What is the normal operation of the Fuller Earth Filters ?

A

Normally kept in continuous operation when turbine in service

32
Q

What other pump can operated the Fuller Earth Filters ?

A

Motor driven transfer pump can be used for extended maintnence outage

33
Q

What is the Relief Valve setpoint? Where is the relief valve located ?

A

-Setpoint is 75psig
-located downstream both Hydraulic Pumps & FCV-27

34
Q

Where are the two pressure gauges located around the Fuller Earth Filters & what do they indicate ?

A

One inlet pressure gauge & outlet pressure gauge

35
Q

Why do new Fuller Earth Filters need to be caked for two hours ?

A

Buildup is required to prevent migration of Fullers Earth particles into the Main Fluid when returned to normal service

36
Q

What is the Flow Path for the Fuller Earths “Caked” process ?

A

Recirc mode through filters & recirculation tank, back to Hydraulic Fluid Filtering Pump

37
Q

What does the Transfer Pump Filter do ? When should it be replaced?

A

-Filters hydraulic fluid throughto low particulate size
-Needs to be replaced if local inlet gauge reaches 15psig

38
Q

What is the 4-position Filtering Selection Valve V204 used for ?

A

Used to direct flow to:
-Closed
-Discharge (drain)
-Recirculate to Hydraulic Fluid Reservoir
-Recirculate to Recirc. Tank

39
Q

What is the Control Oil Recirculating Tank used for ?

A

Used during 2hr caking process of the new Fuller Earth Filters

40
Q

What is the Hydraulic Fluid Filtering Pump used for ?

A

-Pumps control oil through fuller earth filtering when Main Hydraulic pumps are shutdown
-Used during power for bypass filtering fluid in reservoir
-Used when adding/draining reservoir

41
Q

What kind of switch does the Hydraulic Fluid Filtering Pump ?

A

Two position start/stop switch that will start or stop pump

42
Q

When does Control Room alarm for Control Oil Header Pressure ?

A

When Control Oil Header Pressure drops to 1300psig

43
Q

What happens when Control Oil Header Pressure drops to 1100psi ?

A

If pressure drops to 1100 turbine will trip (2/3 logic)

44
Q

What happens on a loss of Instrument air to Hydraulic Coolers ?

A

-TC Inlet Valve to coolers will fail open
-Oil will become overcooled
which,eventually turns on heaters & fans to maintain reservoir temp

45
Q

What happens on a loss of instrument air to the stealth conditioner/dryer ?

A

This would allow moisture into control oil

46
Q

What happens on loss of TC to the Hydraulic Coolers ?

A

-Need to place the heater-fan switch to start, to ONLY start fans
-If problem is with one cooler, then place other cooler in service

47
Q

What must be previewed before handling Fyrquel EHC Fluid ?

A

-Chemical Use Permits(CUP)
-Material Safety Data Sheets

Systems (62 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions