CDC 3E051B Vol.3 Unit 3

What depth do you dig the trench for a below-ground check of a pole?

A) 8 to 18 inches.
B) 12 to 24 inches.
C) 4 to 6 inches.
D) 24 to 36 inches.

Decay usually starts at what location on a crossarm?

A) Bottom.
B) Ends.
C) Pin holes.
D) Top.

What condition can cause a crossarm to twist?

A) Lightning or voltage surges.
B) Crossarm unseasoned when it was installed.
C) Unbalanced strain or insufficient guying.
D) Improper sag.

When a span shows too much sag while adjacent spans appear normal,...

A) the conductor has stretched from being hit by a falling object.
B) it's a sign of loose tie wires.
C) it's a result of poor guying.
D) the cause is a twisted crossarm.

We must make voltage and current readings on capacitor installations at least...

A) 4 times a year.
B) twice a year.
C) annually.
D) 6 times a year.

What do we use to cut tree limbs that are beyond arm's reach?

A) Forester saw.
B) Docking saw.
C) Crosscut saw.
D) Pole saw.

Where would you put the tree pruner to add a third section?

A) Lay it across the truck bed.
B) Lay it flat on the ground.
C) Send it to the shop.
D) Lean it against a tree limb.

What species of trees do we usually top?

A) Oak, elm, and hackberry.
B) Spruce, pine, and fir.
C) Pine, elm, and pecan.
D) Willow, cottonwood, and poplar.

What is usually the first step in troubleshooting a tripped overhead distribution circuit?

A) Try to reset the circuit's recloser.
B) Apply necessary ground sets.
C) Inspect the circuit visually.
D) Test the circuit.

What do we use to test a distribution line for a ground?

A) Phase rotation meter.
B) Ammeter.
C) Voltmeter.
D) Megger.

Which of these is not one of the three main causes of power line noise?

A) Defective equipment insulation.
B) Electrostatic leakage from ungrounded hardware.
C) Loose connections in the primary or neutral circuit.
D) Bonded ground wires on the utility pole.

What must the electrician do before working on deenergized lines?

A) Test and ground the lines.
B) Close the normally open switch.
C) Don rubber protective equipment.
D) Notify reporting official.

How is the cable used for ground sets constructed?

A) 600-volts insulated rubber or synthetic-covered hard-drawn copper.
B) 5,000-volts insulated rubber or synthetic-covered hard-drawn copper.
C) 600-volts insulated rubber or synthetic-covered flexible copper.
D) 5,000-volts insulated rubber or synthetic-covered flexible copper.

When a break occurs in an energized line, how is the line at the break affected?

A) Both ends of the wire are melted.
B) The whole wire get very brittle and charred.
C) Both ends of the wire are hardened.
D) The center disappears, leaving soft wire on either side.

What do you use to check a suspected damaged transformer?

A) Voltmeter.
B) Clamp-on ammeter.
C) Megger.
D) Oil tester.

What must you do before working on energized lines?

A) Inspect hot line tools and equipment for proper operation.
B) Inspect the utility pole for heart-rot.
C) Fill out AF Form 980, Caution Abnormal Conditions tag.
D) Fill out AF Form 103, Base Civil Engineering Work Clearance Request.

What two connector types do we use when splicing energized conductors?

A) Hot line clamp and split-bolt.
B) Split-bolt and automatic.
C) Compression and automatic.
D) Compression and hot line clamp.

In making a midspan splice on an energized line, position the personnel bucket of the bucket truck...

A) parallel to the area to be spliced.
B) at a 45° angle to the break.
C) directly under the area to be spliced.
D) so the linemen can face the splice area from the front of the bucket.

What tie stick head do we normally use to untie tie wires?

A) Rotary blade.
B) Double prong.
C) Rotary prong.
D) Fixed head.

Once we untie the tie wires what do we use to raise the auxiliary crossarm assembly?

A) The mast pole.
B) A snatch block.
C) Wire tongs.
D) A handline.

When the pole has a single crossarm supporting three phase conductors how many line hoses are needed for a pole change?

A) 10.
B) 8.
C) 12.
D) 14.

When replacing a pole, how many feet above the pole do you raise the auxiliary arm?

A) 3 to 4 feet.
B) 6 to 7 feet.
C) 7 to 8 feet.
D) 5 to 6 feet.

The high voltage audible indicator makes an audible sound when placed...

A) in an electrostatic field.
B) on a hot stick.
C) in the bucket truck.
D) on the utility pole.

The act of tying a tagline to each outside conductor with a bowline knot and pulling the conductors out of the work area is called...

A) line knotting.
B) tagging out.
C) bowlining.
D) tying off.

Service meters are used to determine...

A) how large a service is needed for a facility or organization.
B) if sufficient voltage is reaching a facility or organization.
C) if sufficient amperage is reaching a facility or organization.
D) how much power has been used by a facility or organization.

The service meter normally measures...

A) volt-amps.
B) kilowatt-hours.
C) power factor.
D) kilowatts.

What is the formula to find the amount of watt-hours used?

A) Volts multiplied by amps.
B) Multiplier times the previous reading.
C) New reading minus the previous reading.
D) Power factor times wattage.

When transposing the numbers from the dial meter to a piece of paper, start on the...

A) left hand dial then work to the right.
B) top dial then work to the bottom.
C) right hand dial then work to the left.
D) bottom dial then work to the top.

What is the approximate bending radius for underground cable?

A) 10 to 15 times insulation thickness.
B) 10 to 15 times cable diameter.
C) 5 to 12 times cable diameter.
D) 5 to 12 times insulation thickness.

How much straight cable needs to exist on each side of a cable splice for racking purposes?

A) 12 inches.
B) 2 feet.
C) 6 inches.
D) 1 1⁄2 feet.

What type of tape is used for fireproofing underground cable in manholes?

A) Polymeric elastomer.
B) Waxed nylon.
C) Aluminum shielding.
D) Asbestos.

What type of cable test is made after its installed but before it is placed into service?

A) Acceptance test.
B) Factory test.
C) Proof test.
D) Maintenance test.

Generally if a cable's insulation is deteriorating, what does a direct current high potential (DC Hypot) cable test indicate for each succeeding test?

A) Lower resistance or a lower power factor.
B) Lower resistance or a higher power factor.
C) Higher resistance or a higher power factor.
D) Higher resistance or a lower power factor.

What is the easiest and quickest way to locate a cable fault?

A) Visually.
B) Re-energizing the circuit.
C) Tracer method.
D) Ohm method.

When you check for a grounded conductor with a volt-ohmmeter, what reading would indicate a grounded conductor?

A) High resistance.
B) Low voltage.
C) High voltage.
D) Low resistance.

When you use the mm-1 fault locator or the thumper to locate a cable fault, when you are
over the fault location...

A) the signal increases with both testers.
B) fault locator signal increases at the fault; thumper signal decreases.
C) fault locator signal fades out at the fault; thumper signal increases to the loudest volume.
D) the signal decreases with both testers.

In many cases, a cable fault is located at a...

A) cable ground connection.
B) bend in the cable.
C) duct entrance.
D) splice.

Which cable splice kit requires the most labor to install?

A) Separable insulated connectors.
B) Power cable joint.
C) Heat-shrinkable.
D) Conventional taped splice kit.

What should be your first step when troubleshooting a pad mount transformer?

A) Take phase-to-ground voltage readings on the primary side.
B) Take a complete set of primary phase-to-phase and phase-to-ground voltage readings.
C) Take a complete set of secondary phase-to-phase and phase-to-ground voltage readings.
D) Take phase-to-phase voltage readings on the secondary side of the transformer.

If tests indicate an off-ratio winding, how would you verify whether or not the problem was in the transformer?

A) Take secondary current readings on all three phases.
B) Take primary current readings on all three phases.
C) Take voltage readings on the primary side of the transformer.
D) De-energize the transformer and take resistance readings on the transformer windings.

After you remove the crossarm, who lowers it to the ground?

A) The supervisor.
B) The ranking 5-level.
C) The linemen.
D) The ground person.