LONG QUIZ 3
False
1. Each GT unit operation begins with a combined cycle process right away upon start-up. True or False?
C. ST start to Generator synchro duration is dependent on metal temperature
10. Which of the following conditions applies during ST start-up? A. ST speed stays at 400rpm while rub check is being done B. Valve Transfer can be done after generator synchronization C. ST start to Generator synchro duration is dependent on metal temperature D. Close All Valves "CAV" is initiated after Heatsoak time is complete before speeding up
AO Card
100. This card is used to send 4-20mA signal going to control valves:
C. EWS
101. It is designed for configuration, maintenance and diagnostics of the control system applications and other control system equipment: .A. HMI B. RMS C.EWS D. PLC
F
102. Each of the GT/ST Main transformers is provided with a single stage of cooling. /True or False?
110C
103. What is the transformer winding temperature trip setting?
Buchholz relay
104. It detects oil loss, accumulation of air, violent vibration, fault tripping, and gas generation due to minor trouble in the transformer tank.
False
105. If the color of silica gel has turned more than one third pink, dry it out or exchange it. True or False?
Differential Protection Relay
106. Main protective relay for detecting an electrical fault in a transformer.
Overcurrent and ground fault relay
107. Detect faults such as short circuits and ground faults in the electrical system including transformers. A. Differential protection relay
Blackout
108. EDG units are installed at Ilijan Plant capable of immediate start and accept load during ___
True
109. Aux. Transformers secondary side undervoltage relays send start signal to all 6 EDGs. True or False?
True
11.Block operation is declared available once the 2nd HRSG steam supply bypass is closed. True or False?
D. If EDG 3 43SS manual & 4 auto; Both will automatically start, then synchronized in sequence
110 Which of the following conditions will happen during blackout w/ EDG 1, 2, 5 & 6 on E-stop condition? A. If both EDG 3&4 43SS auto; Both will automatically start, then synchronized at the same time B. If both EDG 3&4 43SS manual; Only EDG 3 will automatically start and synchronized C. If EDG 3 43SS auto & 4 manual; Only EDG 3 will automatically start and synchronized D. If EDG 3 43SS manual & 4 auto; Both will automatically start, then synchronized in sequence
1200 kw 2000 kw
111. Specify our EDG design output & capability to sustain continuous normal operation?
False
112. Ilijan LNG-1 CCPP battery bank is designed to support the Plant critical loads for 2 hrs. True or False?
Floating
113. ___ charge will begin automatically at completion of equalizing charge cycle, when toggle switch is left in AUTO position.
Manual Transfer Switch
114. It Is provided to allow the Regulating Transformer power the UPS loads directly, should the Inverter and the Static Switch become unavailable; it may also be used for maintenance purposes.
False 3phase
115. UPS automatic transfer from battery to 10 480VAC happen once AC power is restored. True of False?
80 MW - 105 MW
12. At what load range can the GT fuel changeover from FG to FO be carried out?
C. WIP starts 80sec after changeover and Pilot water injection cuts-in
13. Which of the following conditions applies during GT fuel changeover sequence? A. Flow divider motor runs continuously to ensure proper distribution of fuel for each nozzle B. Pre-Heater is placed in service while FWH turns offline about 5mins after "Oil In" C. WIP starts 80sec after changeover and Pilot water injection cuts-in D. Pilot fuel line change-over first followed by the Main line
15 MW - 20 MW
14. Specify the target load range for ST before off-loading its generator:
Extra High Voltage
15. In what voltage class does Ilijan 500kV SWYD belong?
False
16. The hydraulic oil pump is used pressurize the GCB only during closing. True or False?
False
17. If the GCB is still close, you can open the adjacent DSW anytime. True or False?
Generation Transmission Distribution
18-20. On the typical power flow diagram, give the 3 processes involved from the power plant to consumer:
Backfeed power Fuel Demineralized water Instrument air
2-5. Enumerate four (4) utility supply / requirement for Ilijan CCPP prior to initial unit start-up:
Supervisory Control and Data Acquisition
21. SCADA stands for:
True
22. The revenue metering can record the receive and delivered power at the same time. True or False?
True
23. In closing the GCB, the two adjacent DSW should be closed first. True of False?
SF6 SULFUR HEXAFLUORIDE
24. The arc quenching medium for 500kV switchyard GCB in Ilijan LNG-1 Plant?
F
25. 500kV switchyard DSW, GSW, GCB control cabinets are using 125VAC power source. True or False?
Remote terminal unit
26. RTU stands for:
True
27. When RTU is selected at Ilijan DCS, System Operator can operate the GCB via SCADA True or False?
B. Stator Winding
28. Generator component that carries the rated current without exceeding the specified temperature and able to withstand the voltage induced in it. A Rotor Winding B. Stator Winding C. Field Flashing D. Field winding
Retaining Ring
29. Cylindrical in shape and set up at both rotor shaft ends in order to prevent generator coils from being separated by centrifugal force due to high-speed rotation.
True
30. Adjusting the generator power factor up also increases the terminal voltage True or False?
C. High Voltage Bushing
31. This serves to conduct the three-phase voltage and current flow from the generator stator to the external system: A. Field Winding B. Stator Core C. High Voltage Bushing D. None of the above
Fans
32. Mounted on generator rotating shaft both ends causing continuous circulation of cooling gas:
True
33. Replacement of exciter carbon brush can be done even when the generator is on load. (True or False?
C. Rotor Winding
34. It is the field coil that carries the field current to produce a magnetic field on the rotor shaft: A. Field Circuit Breaker B. Stator WInding C. Rotor Winding D. Field Winding
False
35. The generator exciter part/section is also cooled by hydrogen gas. True or False?
Armature core/ armature winding
36. Operating the generator at leading power factor could lead to heating of ___
D. Field winding
37. It is the part of the generating system where DC excitation happens? A. Excitation Transformer B. Stator winding C. Rotor Winding D. Field winding
True
38. Collector is used to provide connection & path for DC power into rotating field winding. True or False?
Field WInding
39. Operating the generator at lagging factor could lead to heating of ____
D. SFC
40. During normal loaded operation, the following equipment are part of excitation system except: A Excitation transformer B. Power Converter C. Field Current D. SFC
40 %
41. At what percent (%) of the generator rated voltage will the Field Flashing contactor open?
False
42. The excitation system supplies the field current on the stator windings of the generator. True or False?
B. From Generator terminal via Excitation Transformer
43. During self-excited operation of the generator/motor, the input power of the excitation system comes from _____ in order to supply the field current. A. From 4.16kV switchgear via Start-up excitation transformer B. From Generator terminal via Excitation Transformer C. From Static Frequency converter D. None of the above
True
44. In a normal operation, the excitation power is taken from the generator terminal. True or False?
2700 rpm
45. At what rpm does the SFC disengage completely during start-up?
True
46. In the case of self-excitation, residual voltage of the generator is insufficient to initiate build-up of generator voltage via the power converter that's why field flashing is necessary. True or False?
D. Start up exc. Tr. Secondary Breaker
47. Which of the equipment listed below cannot be found on the Excitation system of Generator? A. Field Circuit Breaker B. Excitation Transformer C. Excitation Transformer Secondary Breaker D. Start up exc. Tr. Secondary Breaker
125 VDC
48. What is the voltage supplied by the generator field flashing circuit?
True
49. Both ST> have excitation transformers connected to the generator output terminals. True or False
True
50. When the generator terminal voltage does not build up at full speed no load (FSNL), a manual operation can be done to initiate voltage build up.(True or False?
Field flashing
51. To generate voltage build-up, this one supplies the initial voltage to create excitation:
True
52. The start-up transformer reduces the auxiliary network voltage, to the input voltage level of the power converter. (True or False?
Field Circuit Breaker
53. Component used to interrupt high current between the generator rotor winding and the excitation system:
Control Cubicile DC reactor inverter rectifier mv breaker
54-58. Enumerate 5 major components installed inside the SFC panels:
True
59. Opening any of the panel doors of the SFC will trip the operation. (True or False?
COLD Tm< 120C WARM 120C<Tm<120C HOT TM>=400C
6-8. Enumerate the three (3) start-up modes of ST with each corresponding metal temperatures:
4600 kw
60. Specify the Static Frequency Converter power rating (machine side):
D. Harmonic filter prevents large voltage and current distortions after disengaged completely
61. Which of the following is not true about SFC? A. Supplied with 4.16kVac as primary source of power B. The Generator acts as a motor at the start C. ST Generator don't have start-up excitation transformer D. Harmonic filter prevents large voltage and current distortions after disengaged completely
False
62. The SFC disconnect switches including the tie can be operated automatically. True or False?
2700rpm
63. At what speed does the SFC stop based on its start-up curve?
A. EDG Bus Bars
64. Which of the following does not belong to 19kV system in Ilijan LNG-1 Plant? A. EDG Bus Bars B. Isolated Phase Bus C. GT and ST Generator D. Auxiliary Transformer
Undervoltage Relay
65. This relay gives signal for the EDGS to start during Blackout:
True
66. The GT and ST Main Transformer can either be a step-up or a stepdown transformer True or False?
motor protection Relay
67. MPR stands for:
A. Emergency Seal Oil Pump
68. Which of the following does not belong to 480V MCC? A. Emergency Seal Oil Pump B. Lube Oil Vapor Extractor C. Control Oil Pump D. Lube Oil Pump
False
69. Air Circuit Breakers are controlled by 120V AC for closing and trip circuit. True of False?
5
70. How many 4.16kV metal clad SWGR are there inside Ilijan LNG-1 Plant SWGR room?
False
71. Auxiliary Transformers are supplied either from ST output or from the backfeed power. True or False?
Motor Control Center
72. MCC:
Lighting Distribution Panel
73. LDP:
Power Distribution Panel
74. PDP:
Dry type
75. Specify the type of transformer used to supply Low Voltage SWGR:
True
76. Instrument Air is used for cooling the conductor inside Isolated Phase Bus. (True or False?
Piezoelectric pressure transducer acceleration sensor
77-78. Two sensors installed in each GT combustor for Combustor Pressure Fluctuation Monitoring System:
Combustor bypass valve
79. Fuel-air ratio in combustion zone is controlled to be optimum value by ___
True
80. Control Signal Output (CSO) controls fuel flow so as not to exceed limitation of GT output, speed, Turbine inlet temperature and Exhaust temperature. (True or False?
D. 200MW
81. What is the load schedule for the start of combustion tuning? A 50MW B. 100MW C150MW D. 200MW
16
82. How many Blade Path Temperature sensors are installed in each Gas Turbines?
True
83. IGV and Bypass valve are corrected by ambient air temperature in order to keep combustion condition constant. True or False?
A. 3,7,11,15
84. Each Gas Turbine has four (4) acceleration sensors installed in combustor numbers: A. 3,7,11,15 B. 3,7,11,16
Bridge Controller
85. What does BRC stands for in DCS?
False
86. Communication between DDC and PLC is called MODBUS protocol. True of False?
Hnet
89. A network in which Harmony controllers and Harmony 1/0 blocks communicate:
2150rpm
9. Specify the ST heatsoak speed where it stays at preset timer to achieve sufficient warming:
RMU - Repeater Mounting Unit
90. What is the hardware used to communicate two 1/0 H-net?
Analog input Analog Output Digital Input Output
91-93. What are the 3 types of DCS Harmony I/O modules in Ilijan LNG-1 Power Plant?
Modbus protocol
94. Communication between Gas Turbine controller, ST Turbine controller and DCS:
Reduplicate
95. CPU Card, Power Supply Module and 1/0 bus are always ___ provide reliability to GT and ST Control System.
A. valve position demand
96. Digital Input (DI) Card is used in the following application except: A. valve position demand B. Pressure Transmitter C. Vibration monitor D. GT trip signal
EOST
97. This card is a speed input card which has an over speed trip function:
A Relay Contact
98. Digital Output (DO) Card is used for this application: A Relay Contact B. Pressure Transmitter C. Position Limit Switch D. Valve Position Feedback
24 VDC
99. Specify the output voltage of Power supply module for GT/ST Control system:
monitor control
DCS is composed of equipment that the operator uses to (87) and (88) process conditions.
