B5U1 Contingency Power Plants Flashcards
At what amperage can a slight shock typically be felt?
1 miliampere (.0001 amps).
Who may perform maintenance on high voltage distribution systems?
Use only qualified electrical personnel.
How many days of fuel should you have at your power generation site?
Seven-day fuel supply.
Who may perform maintenance on high voltage circuits?
Only formally trained personnel.
What is the droop setting on the A4 electronic governor for single unit operation?
Zero Droop
What switch must be activated prior to closing the output circuit breaker?
The synchroscope must be activated in order for the output circuit breaker to close.
What is motorization?
Motorization is when a generator is connected to the bus but is not carrying any load. Additionally when this occurs the generator is being powered by the other generators on the bus, thus acting as a motor.
What are crosscurrents?
Crosscurrents are wasted power. Crosscurrents are normally caused by differences in output voltage of generators sharing a common bus.
How often should the oil be changed on the MEP–12?
The oil should be changed every 300 hours of operation.
How often should the fuel filters be replaced on the MEP–12?
The fuel filters should be changed every 250 hours of operation.
How many kW are provided when the BPU is operating at 60Hz?
800 kW
How many PP paralleling modes are available for the BPU, and what are they?
3 modes: Isochronous, droop and utility.
What component(s) are supplied power from the 75 kVA power transformer in the switchgear?
Radiator and engine compartment cooling fans.
What type of fuel system does the BPU use?
Modular Common Rail System.
The four large capacity, dual-stage filters are part of which system?
Air intake system.
Which component will isolate current between the DCS and the batteries?
DC electrical disconnect switch.
What are the three colors of lights on the annunciator and what do they tell us about the generators operation?
Green is for Contactor or synchronization status.
Yellow is for a warning condition and
red is for a fault condition.
What are the two ranges on the lube oil site glass?
(1) Running
(2) Stopped
Where is the 100 amp circuit breaker that feeds the cooling fans located?
Electrical box 3
Where are the decompression doors located?
The bottom of the generator.
How much clearance is required when positioning BPU?
15 feet on all sides.
What distance must a ground rod be from a BPU?
Within 6 feet.
What is used to guide you through a pre-operational inspection?
Technical order.
Which DCS screen is used to test the annunciator?
Service adjustments screen.
Why must you wait for the DCS to shut down?
Equipment damage.
What button is used to manually sync the BPU?
AC circuit interrupt button.
What button do you push to automatically sync the BPU?
Auto/parallel mode button.
What is needed to download the ROP software?
The technical order, Suitable computer and remote cable with RS 485 converter and USB cable (included with BPU.
What are the three color indicators on the configuration screen and what do they mean?
(1) Black – Inactive communications
(2) Green – Active, non-faulted communications
(3) Red – Active, faulted communications
What is needed to download the InPower BPU software?
Technical order, Suitable laptop and USB cable (located in storage box).
How is the BPU’s technical order organized?
Into work packages (WP) and subordinate work packages (SWP).
What type of maintenance is found in WP 007 00?
Periodic and special maintenance, scheduled maintenance, replacement schedule, servicing, corrosion prevention and cleaning.
Where are the preparations for maintenance instruction found?
WP 006 00.
Where is the post-maintenance operational checkout instructions located?
WP 010 00.
What electrical inspection requires the removal of the DCS?
8800 hours
How often do you change 15W-40 oil and oil filter on the BPU?
400 hours
How often do you inspect and clean crankcase breather and replace coalescers?
1200 hours
What are the three ways to troubleshoot the BPU?
(1) DCS fault code isolation
(2) Symptom-based fault isolation (3) Individual component testing
Normally the alternating current (AC) volts found within the mission essential power (MEP)–12 bare base equipment can be how high?
a. 120.
b. 208.
c. 600.
d. 4,160.
D. 4160
What happens if electrical current between 100 and 200 milliamperes is absorbed by the body?
a. Skin burns.
b. Muscles relax.
c. Contacted areas blister.
d. Instant death from heart failure.
D. Instant death from heart failure
Who must perform the isolation of a mission essential power (MEP)–12 generator from a primary distribution center (PDC)?
a. Qualified electrical systems personnel.
b. Qualified power production personnel.
c. Qualified electrical systems and/or power production personnel.
d. Any civil engineer personnel.
A. Qualified electrical systems personnel.
Identify the voltage that is considered high voltage. High voltage is any voltage exceeding
a. 120 volts, alternating current (VAC).
b. 600 VAC.
c. 480 VAC.
d. 277 VAC.
B. 600 VAC
The mission essential power (MEP)–12 generator is rated for which power factor?
a. .75.
b. .85.
c. .8.
d. .9.
C. 0.8
What is the maximum distance a MEP–12 can be operated when using a remotely located control panel?
a. 150 yards.
b. 15 yards.
c. 50 feet.
d. 150 feet.
D. 150 feet
Mission essential power (MEP)–12 generators are positioned so that the prevailing winds blow
a. across the radiator fan.
b. across the side of the generators.
c. in the same direction as the radiator fan.
d. in the opposite direction the radiator fan.
c. in the same direction as the radiator fan.
What can you do to prevent the brakes from being applied during backing of a mission essential power (MEP)–12 generator?
a. Use a tow strap.
b. Block the surge brakes.
c. Back the vehicle quickly.
d. Disconnect the brake lines.
B. Block the surge brakes.
What is the maximum towing speed you are allowed to tow a mission essential power (MEP)–12 diesel generator on paved surfaces?
a. 5 miles per hour (MPH).
b. 10 MPH.
c. 20 MPH.
d. 30 MPH.
C. 20 MPH
Note: only 5 MPH on unpaved surfaces
Warning: Do NOT exceed a turning angle of 30 degrees or we may damage the tow bar.
At a bare base site, how many days of fuel is expected to be maintained at each prime power generation location?
a. 1⁄3.
b. 3.
c. 7.
d. 10.
C. 7
How many connections does a fuel bladder have?
a. 1.
b. 2.
c. 3.
d. 4.
C. 3
How many feet tall should the berms be to contain a possible fuel spill at a mission essential power (MEP)–12 fuel system layout?
a. 11⁄2.
b. 3.
c. 31⁄2.
d. 4
D. 4
During a pre-operation inspection on a mission essential power (MEP)–12 generator the voltage regulator switch should be in which position?
a. Manual.
b. Auto.
c. Asynchronous.
d. 30 droop.
B. Auto
CAUTION: do not use this switch during operation.
When starting a mission essential power (MEP)–12 which event(s) take place when the engine toggle switch is released to the run position?
a. The engine will accelerate to rated speed.
b. The voltage regulator will flash the field.
c. The engine will shut down.
d. The engine will accelerate to rated speed and the voltage regulator will flash the field.
D. The engine will accelerate to rated speed and the voltage regulator will flash the field.
How often should you perform running checks during the time that the mission essential power (MEP)–12 generator is online?
a. At least once a shift.
b. At least once an hour.
c. No more than once a shift.
d. No more than once an hour.
B. At least once an hour
Meter readings are recorded on a mission essential power (MEP)–12 generator every
a. half hour.
b. hour.
c. two hours.
d. four hours.
B. Hour
Motorization of a generator occurs when
a. there is some load on the generator while it is still connected to the bus.
b. all load has been removed after the generator is disconnected from the bus.
c. all load has been removed from the generator while it is connected to the bus.
d. there is some load on the generator after it has been disconnected from the bus.
c. all load has been removed from the generator while it is connected to the bus.
Which meter readings indicate motorization of a generator?
a. The kilowatts (kW) meter is above zero, the ammeter is reading amperage, and the power factor (PF) meter is moving off scale.
b. The kW meter at zero or lower, the ammeter reading zero, and the PF meter is moving off scale.
c. The kW meter at zero or lower, the ammeter is reading amperage, and the PF meter is reading unity.
d. The kW meter at zero or lower, the ammeter is reading amperage, and the PF meter is moving off scale.
d. The kW meter at zero or lower, the ammeter is reading amperage, and the PF meter is moving off scale.
How are crosscurrents between parallel generators minimized if the bus voltage is low and the power factors (PF) are different?
a. Lower the voltage to all units.
b. Raise the voltage to the lag unit.
c. Raise the voltage to the lead unit.
d. Lower the voltage to the lead unit.
c. Raise the voltage to the lead unit.
How are crosscurrents between parallel generators minimized if the bus voltage is low and the power factors (PF) are the same?
a. Raise the voltage to all units.
b. Raise the voltage to the lag unit.
c. Lower the voltage to the lead unit.
d. Lower the voltage to the lag unit
A. Raise the voltage to all units.
How are crosscurrents between parallel generators minimized if the bus voltage is high and the power factors (PF) are the same?
a. Lower the voltage to all units.
b. Raise the voltage to the lag unit.
c. Raise the voltage to the lead unit.
d. Lower the voltage to the lead unit.
a. Lower the voltage to all units.
Typically mission essential power (MEP)–12 generators are scheduled for maintenance after operating for
a. one year.
b. thirty days.
c. 300 hours.
d. 1,000 hours.
C 300 hours
When removing mission essential power (MEP)–12 oil filters how many main filters are replaced?
a. 4.
b. 3.
c. 2.
d. 1.
A. 4
NOTE: There are
4 main oil filters
2 Bypass oil filters
2 fuel filters
System is a 30 gal system (oil)
What is the last step in performing a 300 hour mechanical preventative maintenance inspection (PMI) on a mission essential power (MEP)–12 generator?
a. Run up the engine to ensure that no leaks are present.
b. Update the historical records.
c. Clean radiator.
d. Add oil.
b. Update the historical records.
What is the ratio of the T4-T9 transformers on a mission essential power (MEP)–12 generator?
a. 10:1.
b. 15:1.
c. 20:1.
d. 30:1.
C. 20:1
YO! These are those pain in the ass transformers next to the shit ton of fuses that we use to check with Pincheon remember?
What size fuses are inspected on the CB5 during a high voltage inspection on a mission essential power (MEP)–12 generator?
a. 175 Amp.
b. 155 Amp.
c. 140 Amp.
d. 170 Amp.
D. 170 amp
YO! These are those big ass fuses at the front of the trailer. We had to use that big stick to discharge them before inspecting. Borges helped us out the first time around
When using a MEP–12 ladder diagram the positive side of the diagram is located on the
a. left side.
b. right side.
c. top of the diagram.
d. bottom of the diagram.
C. Top of the diagram
When using a crew/operator troubleshooting chart in a mission essential power (MEP)–12 TO what should you do if you see the following statement: refer to the next higher level on maintenance?
a. Call your boss.
b. Turn in the generator to depot.
c. Guess what is wrong.
d. Proceed to the organizational troubleshooting chart.
D. Proceed to the organizational troubleshooting chart.
How many paralleling modes can a basic expeditionary airfield resources (BEAR) power unit (BPU) operate in?
a. 3.
b. 2.
c. 1.
d. 4.
A. 3
NOTE:
MODE: Isochronous -mode provides constant voltage and frequency and is used when paralleling with other BPUs.
MODE: Droop- mode allows for variable voltage and frequency. This mode allows the BPU to be synced with other generators such as a MEP-12.
MODE: Utility- allows parallel operation with a utility power grid (commercial power grid).
Which power factor is the basic expeditionary airfield resources (BEAR) power unit (BPU) alternator rated?
a. .80.
b. .85.
c. .75.
d. .70.
C. .75
NOTE: This differed from the MEP series which is rated for .8. Also, this differs from what is most commonly known as .8.
How is the radiator fan speed controlled on the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. Thermostat.
b. Viscous clutch.
c. Humidistat.
d. Variable frequency drive (VFD).
B. Viscous Clutch
What is the preferred fuel for the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. JP–8.
b. Diesel.
c. JP–4.
d. Jet A1.
A. JP-8
NOTE: Can run on diesel without any issues.
YO! I’ve seen the fuel preferences posted on the exterior of the housing
What is the maximum time the basic expeditionary airfield resources (BEAR) power unit (BPU) can run on a full day tank?
a. 1 hour at 50 percent load.
b. 30 minutes at full load.
c. 1 hour with no load.
d. 1 hour at full load.
D. 1 hour at full load.
Where is the coolant level indicator located on the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. Inside the engine compartment.
b. Outside the radiator compartment.
c. Inside the radiator compartment.
d. Next to the control panel.
C. Inside the radiator compartment
Where are the motor protectors located on the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. Electrical box 1.
b. Electrical box 2.
c. Electrical box 3.
d. Electrical box 4.
B. Electrical box 2
NOTE:
Box 1: Hour meter, relays, fuses, breakers
Box 3: humidistat and thermostat
What resource is used to regulate moisture in electrical box 3 on the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. Cooling fans.
b. Heat strips.
c. Circuit breakers.
d. Fuel fired heaters.
B. Heat strips
Where are the decompression doors located on the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. The top.
b. In the front.
c. At the rear.
d. On the bottom.
D. On the bottom.
If more than one basic expeditionary airfield resources (BEAR) power unit (BPU) is installed which copper conductor ground grid cable size must be used to connect them to the ground grid?
a. #6 AWG.
b. #2 AWG.
c. #8 AWG.
d. #10 AWG.
B. #2 AWG
NOTE: The smaller the number the bigger the cable!
Which screen on the basic expeditionary airfield resources (BEAR) power unit’s (BPU) digital control system (DCS) is the fuel source selected?
a. Main.
b. Adjustments.
c. Service adjustments.
d. Engine adjustments.
A. Main
YO! We did this all the time. French showed me a few tips here and there. Choosing between fuel sources was easy.
What are the three tabs in the basic expeditionary airfield resources (BEAR) power unit’s (BPU’s) remote operating platform (ROP) software?
a. Master, configuration, and setup screens.
b. Details, communication, and configuration screens.
c. Communication, configuration, and master screens.
d. Master, detail, and configuration screens.
d. Master, detail, and configuration screens.
In the basic expeditionary airfield resources (BEAR) power unit’s (BPU’s) remote operating platform’s (ROP) configuration screen what three colors provide information on communication?
a. Black, green, and red.
b. Red, green, and yellow.
c. Blue, yellow, and green.
d. Red, blue, and black.
a. Black, green, and red.
What is used to extract capture files from the basic expeditionary airfield resources (BEAR) power unit (BPU)?
a. Remote operating platform (ROP) software.
b. InPower BPU.
c. The digital control system’s (DCS) diagnostics program.
d. BPU capture program.
B. InPower BPU
The basic expeditionary airfield resources (BEAR) power unit’s (BPU’s) technical order dived up into
a. work packages and subordinate work packages.
b. work packages only.
c. chapters.
d. paragraphs and sub-paragraphs.
A. work packages and subordinate work packages.
When performing a 400 hour electrical inspection on the basic expeditionary airfield resources (BEAR) power unit’s (BPU’s) switchgear, what is the required resistance reading for the ground connections?
a. Less than 30 ohms.
b. Less than 35 ohms.
c. Less than 26 ohms.
d. Less than 25 ohms.
D. Less than 25 ohms.
When performing a 400 hour mechanical inspection on the basic expeditionary airfield resources (BEAR) power unit (BPU) where can total run time for the coolant heater be found?
a. Engine run hour meter.
b. Hour meter on the heater.
c. The auxiliary hour meter.
d. The service adjustments screen on the digital control system (DCS).
D. The service adjustments screen on the digital control system (DCS).
How often is the oil changed on the basic expeditionary airfield resources (BEAR) power unit (BPU) when using 15W–40?
a. Every 250 hours.
b. Every 400 hours.
c. Every 300 hours.
d. Every 500 hours.
B. Every 400 hours
WARNING: When using 5W-30 oil must be replaced every 250 hours
Which type of electrical distribution layout provides two or more paths for current flow to a facility?
a. Loop.
b. Open.
c. Radial.
d. Closed.
A. Loop
How many 60-amp outputs are included on the secondary distribution center (SDC)?
a. 10.
b. 12.
c. 14.
d. 16.
D. 16
What is the amperage rating of the mission essential circuit breaker on the secondary distribution center (SDC)?
a. 60 amps.
b. 100 amps.
c. 150 amps.
d. 250 amps.
A. 60 amps
How many lights make up the light mast on the TF–2 light cart?
a. 2.
b. 4.
c. 6.
d. 8.
B. 4
YO! We worked on a shit ton of these in KUWAIT remember? Not so much in JORDAN. But, we maintained these at SHAW too.
How often is oil changed on the TF–2?
a. Every 250 hours.
b. Every 300 hours.
c. Every 400 hours.
d. Every 350 hours.
A. Every 250 hours.
YO! Don’t get this confused with the BPU’s oil change [only with 5W-30]
How long does it take for the light bulbs on the TF–2 to warm up?
a. One to two minutes.
b. Four to six minutes.
c. Two to four minutes.
d. Four to five minutes.
C. 2-4 minutes
YO! Remember that time the structures boys were working in front of the enlisted club and they doubted the capabilities of the lights? That’s because they hadn’t warmed up yet.
How many three phase outputs does a PDC have?
The PDC has 6-three phase outputs.
How many PSC are needed to support four generators?
Two primary switches are needed to support four generators.
How can a SDC receive power?
Directly from a PDC, a loop feed from another SDC, or through a low voltage generator.
