CDC 3E051B Vol.4 U1-601, U2-604, 605 & Unit4

What is the primary distribution voltage of the basic expeditionary airfield resources (BEAR) electrical system?

A) 12,470 volts alternating current (VAC).
B) 4,160 VAC.
C) 2,400 VAC.
D) 240 VAC.

What is the output of the 750-kW, mission essential power (MEP)-12 generator in a basic expeditionary airfield resources (BEAR) package?

A) Single-phase, 2,400 volts.
B) Three-phase, 2,400 volts.
C) Single-phase, 4,160 volts.
D) Three-phase, 4,160 volts.

What type of cable termination is used for the primary switching center (PSC) connections?

A) Tape termination kits.
B) Load-break elbows.
C) Heat-shrink molded terminations.
D) Joy splices.

Which way point is used to tie two primary switching centers (PSC) together?

A) 3.
B) 5.
C) 6.
D) 4.

When connecting two primary switching centers (PCS) together using 500 MCM copper cable, what is required to make the connection?

A) 600 amp loadbreak.
B) 600 amp deadbreak.
C) 200 amp loadbreak.
D) 200 amp deadbreak.

What is used to compensate for voltage drop in a secondary distribution center (SDC)?

A) Larger cable.
B) Tap changes.
C) 200-kVA transformer.
D) Copper conductors.

What is the conductor size and insulation value of the basic expeditionary airfield resources (BEAR) high-voltage electrical cable?

A) #1/0, 5 kV.
B) #1/0, 15 kV.
C) #6, 15 kilovolts (kV).
D) #6, 5 kV.

You should bury primary cables to a depth of at least...

A) 24 inches.
B) 8 inches.
C) 12 inches.
D) 18 inches.

How many ways on the primary switching center (PSC) have load interrupter switches?

A) 4.
B) 3.
C) 1.
D) 2.

Before performing maintenance on the secondary distribution center (SDC) you...

A) contact the disaster control center.
B) shut down the primary switching center (PSC).
C) close the mission essential power breaker.
D) ensure all power is removed.

What is the mostly likely problem when there is no power to any of the outbound primary distribution center feeders?

A) Defective load-break elbow.
B) High-voltage cable failure.
C) Power source failure.
D) 200-amp fuse blown.

The recommended distance for secondary runs from the secondary distribution center (SDC) is not to exceed...

A) 400 feet.
B) 600 feet.
C) 1,000 feet.
D) 800 feet.

What basic expeditionary airfield resources (BEAR) asset is used as the main distribution point for secondary circuits?

A) Contractor control cubicles.
B) Remote airfield lighting set (RALS).
C) Primary switching center (PSC).
D) Secondary distribution center (SDC).

How many 120/208 volts alternating current output circuits can the secondary distribution center (SDC) provide?

A) 16.
B) 6.
C) 2.
D) 12.

Which power distribution panel is associated with the tent extendible modular personnel (TEMPER) tent?

A) 100 kW.
B) 25 kW.
C) 200 kW.
D) 15 kilowatt (kW).

What cable size is used to connect the low-voltage mission essential power generator to the secondary distribution center (SDC)?

A) 50-foot, 150-amp.
B) 100-foot, 60-amp.
C) 25-foot, 200-amp.
D) 25-foot, 100-amp.

How do you deenergize the transformer windings of one secondary distribution center (SDC) without deenergizing any of the interconnected SDCs?

A) Turn off the main circuit breaker.
B) Pull the three fused disconnects in the high-voltage compartment.
C) Disconnect the load-break elbows in the high-voltage compartment.
D) Deenergize the main feeder at the primary switching center (PSC).

What can you do to ground the system if the ground rod cannot be driven into the earth during deployments to locations where low voltage will be used for a short time?

A) No grounds are required for low-voltage short-time deployments.
B) Bury the ground rod in a horizontal trench that is 18 inches deep.
C) Drive the ground rod in as far as it will go, and cut off the excess.
D) Connect generator ground to system neutral.

What mixture of salt and water normally increases the conductivity of the soil that is in contact with a ground rod?

A) 3 pounds of salt per 5 gallons of water.
B) 1 pound salt per 3 gallons of water.
C) 1 pound of salt per 1 gallon of water.
D) 3 pounds of salt per 1 gallon of water.

How many light streamers are installed in each tent?

A) 1.
B) 4.
C) 2.
D) 3.

When dissembling the tent lighting assets, where do you store the components?

A) In the middle of the tent.
B) In an approved cargo container.
C) In a convenient location.
D) In the proper storage containers.

What is the next step in installing strobe lights after you ground the series circuit adapter and master strobe?

A) Install the flash tube.
B) Set the strobe master switch to remote.
C) Discharge the capacitors.
D) Set the on-off switches to the on position.

What is the TAG's first step in installing the strobe units?

A) Position the series circuit adapter (SCA) next to the strobe slave.
B) Position the strobe master unit so that its window faces toward the runway.
C) Position the strobe master unit so that its window faces away from the runway.
D) Connect the strobe unit to the SCA.

What is the next step after the TAG installs the 1000 foot crossbar?

A) Position the inboard strobe slave unit.
B) Go directly to the threshold and position the lights.
C) Install the approach lights.
D) Go back to the outboard strobe location and install it.

What is the final step in installing the runway edge lights?

A) Connect the fixture to an isolation transformer.
B) Anchor each light fixture with two ballast rings or one stake.
C) Connect the fixture to the rest of the airfield circuit.
D) Install an isolation transformer inboard of the fixture.

What do you do first when leveling and aiming a precision approach path indicator (PAPI) unit?

A) Level the unit from side to side by adjusting the unit's two front knobs.
B) Adjust the PAPI unit's tilt switch.
C) Level the unit from front to back by adjusting the unit's rear knobs.
D) Adjust the aim of the unit to provide a 3-degree glide slope.

What is the final step in installation of the precision approach path indicator (PAPI) units?

A) Adjust the tilt switch so that the bubble is in the middle.
B) Stake each unit securely to the ground.
C) Align each unit so that it is parallel with the runway.
D) Install a photocell on either unit.

How do you begin the procedure for installing the emergency airfield lighting system obstruction lights?

A) Connect the fixture straight into the runway circuit.
B) Connect the fixture to the runway circuit through a transformer.
C) Install the batteries into the fixture.
D) Connect the fixture to the runway circuit through a series circuit adapter (SCA).

What generator is used for emergency backup of facilities that are mission essential, such as communications centers and command posts?

A) MEP 807.
B) MEP 805A.
C) Mission essential power (MEP) 805.
D) MEP 806A.

Besides conductor size, what is another important factor to consider when reducing voltage drop in an electrical circuit?

A) Circuit distance.
B) Insulation type.
C) Equipment load.
D) Conduit size.

You have a #8 AWG stranded copper conductor with 0.778 ohms of resistance for each 1,000 feet of length. If you run that cabling 100 feet between the power plant and the load, the total resistance would be...

A) 77.8 ohms.
B) 155.6 ohms.
C) 0.1556 ohms.
D) 0.00778 ohms.