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OPERATOR 11 > OPERATOR 2 > Flashcards

OPERATOR 2 Flashcards

(56 cards)

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1
Q

EXPLAIN THE PURPOSE OF THE CONDENSER

A

TO REMOVE THE HEAT IF THE EXHUAST STEAM.

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2
Q

HOW DOES THE CIRCULATING WATER SYSTEM WORK IN CONJECTION WITH THE CLOSED COOLING WATER SYSTEM

A

CIRCULATING REMOVES HEAT FROM THE CLOSED COOLING WATER.

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3
Q

WHAT PUMPS SUPPORT THE FIRE PROTECTION SYSTEM

A

ELECTRIC AND DISEL FIRE PUMP, JOCKY PUMPS HELP MAINTAIN SYSTEM PRESSURE

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4
Q

WHAT TWO TYPES OF COMPRESSED AIR SYSTEMS ARE USED IN THE PLANT AND WHAT IS THE DIFFERENCE.

A

INSTRUTMENT AIR AND SERVICE AIR, INSTRUTMENT IS USED FOR CONTROL VALVES/PLANT EQUIPMENT. SERVICE AIR IS USED FOR AIR TOOLS AND OTHER EQUIPMENT.

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5
Q

DESCRIBE THE DIFFRENT LOCATIONS CLOSED COOLING WATER IS USED

A

SAMPLE PANEL, STEAM TURBINE GENERATOR, CONDENSATE PUMPS, BFP PUMPS, GT 1 AND 2 LUBE OIL SKIDS,HYDROGEN COOLERS AND FLAME SCANNERS AND TURBINE LEGS. AS WELL AS THE LCI COOLING

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6
Q

EXPLAIIN THE MEANING OF COMBINED CYCLE

A

COMBINED CYCLE MEANS THAT YOU HAVE A HRSG.

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7
Q

HOW IS HYDROGEN COOLED IN THE GENERATOR

A

SHELL AND TUBE HEAT EXCHANGERS THE HYDROGEN IS MOVED AROUND BY THE ROTOR FAN THAT HELPS PUSH THE HYDROGEN AROUND.

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8
Q

HOW MANY SECTIONS ARE THERE IN THE STEAM TURBINE.

A

3, HP,LP,HRH

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9
Q

THREEE SYSTEMS THAT DW SUPPLIES WATER TO.

A

CONDENSATE SYSTEM, CLOSED COOLING WATER, AUX BOILER

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10
Q

WHAT IS CLOSED COOLING WATER USED FOR ON THE BFP.

A

COOLING STUFFING JACKETS AND COOLING THE LUBE OIL SYSTEM.

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11
Q

WHAT IS THE FUNCTION OF THE SEAL STEAM.

A

TO KEEP AIR OUT THE STEAM TURBINE AND STEAM IN.

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12
Q

WHAT IS THE FUNCTION OF THE COOLING TOWER.

A

TO REMOVE HEAT THE CIRCULATING WATER SYSTEM.

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13
Q

WHAT IS THE FUNCTION OF THE GLAND STEAM CONDENSER.

A

TO CONDENSE THE STEAM SEAL LEAKOFF AND EXHAUST. ALSO HEATS THE CONDENSATE

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14
Q

What is the normal operating pressure for Lift oil?

A

3000 psi to 3500.

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15
Q

What is the normal operating pressure of the Lube Oil Header on the GT?

A

120psi-130psi

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16
Q

What is the purpose of lift oil on the gas turbines?

A

because of weight.

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17
Q

What is the purpose of seal oil in the Generator?

A

to prevent the hydrogen from escaping out

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18
Q

What is the purpose of the Emergency Lube Oil Pump?

A

to keep oil going incase of ac power lost.

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19
Q

What is the purpose of the Emergency Lube Oil Pump?

A

the loop seal with the float trap.

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20
Q

What oil system supplies the Trip Oil system?

A

hydraulic

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21
Q

What type of fire protection is on the stg lube oil skid

A

dry type piping and deluge system

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22
Q

Where would you go to find the current approved operating instruction?

A

doc-box

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23
Q

Describe in detail all of the different sections of the HRSG and their functions.

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A

economizer,evap,superheat and reheat. econ heats up the water, evap is where the water turns to steam, superheat takes the saturation out of the steam.

24
Q

Describe in detail the Trip Oil system on the Gas Turbine.

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A

if low pressures is sense, oil pressure is drop to tank shutting pm valves and igvs.

25
Describe the different oil systems on a Gas Turbine, how many pumps on each system.
lube oil,seal oil,hyrdualllic oil. seal oil 3 pumps, lube oil has 3 pumps. hydruallic has 2.
26
Describe the flow path of Natural Gas after it leaves the Gas Yard until it enters the GT Combustion Can.
comes up outta the ground over by unit 2 feed pump, goes to the coalescing filters,electric heater,performance heater, scrubber, srv, pm valves.
27
Describe the purpose of the 138 KV system.
to send to the power lines
28
Describe the purpose of the 18 KV system.
transport power to the gsu and step-down transformers
29
Describe what the term blending means and the set points to consider.*
Is when you are attempting to equalize HP (850 PSI),IP (110 PSI) & LP (40 PSI) header presser and temperature between both HRSG's before admitting steam to the turbine from the second started unit.
30
Current is also known as?*
amps
31
Describe Cold Reheat Steam. Where is it coming from and going to?
coming from the hp turbine going to mix with ip steam before going back to the reheater section of the hrsg.
32
Describe Freeze Protection and name some components in the field that have Freeze Protection.
protect equipment from freezing up from cold weather, demin pumps, transmitters, service water lines.
33
Describe Hot Reheat Steam and it's flow path.
crh and ip steam mix together then goes into hrsg where it gets reheated but has lower pressure, leaves the hrsg goes to the ip steam turbine and also crosses over to the Lp turbine.
34
Describe the flow path and function of the condensate system.
condensate systsem takes suction from the hotwell and goes to various equipments like: aux steam attemperator, stjae, gsc, hrh bypasses attemperator, lp bypass attemperator, then eventually going to the Lp fill valves where it turns into feedwater.
35
Describe the flow path and function of the Feed Water System
suction from Lp turbine, feeds to the hp and ip economizers, hp fw feeds hp bypass and attemperator, Ip feedwater feeds reheat desuperheator.
36
Explain all of the chemicals used in the Cooling Tower and the purpose of them.
acid- ph chontrol bromide- makes the bleach stronger dispersecent- prevents the settling or cumpling of particles bleach-bacteria control
37
Discuss the position of the Auxiliary Plant Operator. During a shift, what are an Operators' duties and responsibilities?
make rounds, chemistry, plant startup, work orders, lotos, offloading chemicals, write notifications
38
Explain dew point and what do we use to control the dew point in our air systems?
the moisture in the air. evap coooling media removes any liquid in the air.
39
Explain how we purge the generator from Air to H2.
start purging with co2 to remove any air in the generator and lines, establish seals, then you can start putting h2 inside the generator
40
Explain how we purge the generator from H2 to Air.
purge out all h2 with co2 and its lines, then you can began putting in air.
41
Explain the purpose of a boiler purge?
to remove any combustibles from the boiler before an ignition is restored.
42
Explain the steam flow through the steam turbine.
hp steam going into hp turbine, hrh steam going into ip steam then to the crossover, Lp steam going through the crossover to the lp turbine and exhaust to the condenser.
43
Explain what steps you take to raise H2 purity.
crack open vent valve to vent of hydrogen/ bleed-and-feed.
44
Give two reasons why you would purge a generator ?
outage or loss off seal oil.
45
Name some different types of Electrical Drawings.
One-line, schematic, wiring diagrams.
46
What checks should be made when a unit goes on to Turning Gear?
verify actually on gear, no leaking
47
What does UPS stand for and what is its purpose?
uninterruptible power source, provide reading even when no ac power is available.
48
What is the make up water for the condenser?
DEMIN WATER
49
What is the purpose of the Emergency Seal Oil Pump?
To provide air side seal oil in the case of a loss of AC power to the air and gas side seal oil pumps
50
When starting a turbine, why do we open drains on the steam lines?
to remove any condensation. and make a steam path flow
51
While using an ohmmeter measuring resistance and voltage is applied to the circuit can this result in damage to the ohmmeter?
yes.
52
Why does a Turbine need to be on turning gear prior to and post shutdown?
to prevent bowing and allow for equal heating.
53
Why is superheated steam so important when powering a steam turbine?
any type of saturated liquid inside the steam turbine will result in major damage. steam will damage the turbine.
54
How many flame scanners are there on a gas turbine?
4
55
WHAT IS STG FIELD FLASHING
STARTER FOR THE STEAM TURBINE BY MAGENTIZING THE ROTOR. DC CURRENT
55
EXPLAIN EXCITATION AND ITS PURPOSE.
HELP REGULATE VOLTAGE BEING SENT TO THE GENERATORS.

OPERATOR 11 (3 decks)

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