1What voltage classes can be used for a Distribution System?
5kV, 15kV, 25kV, and 35kV
2The main substation is usually located as close as possible to.
the center of the base load distribution.
3Which item is designed to open a circuit automatically under load and then restore the service quickly once the fault has cleared?
Circuit breaker.
4A substation with one incoming transmission circuit and three outgoing distribution circuits has ( at least ) how many lightning arresters?
12
5Which item supplies control voltage to operate circuit breakers?
Batteries.
6In a circuit, the step-voltage regulator's primary and secondary windings are configured with the primary in.
parallel and the secondary in series.
7What item in an oil circuit breaker suppressed an arc?
Oil.
8What oil circuit breaker components supply amperage to the protective relays?
Current transformers.
9The insulating quality is sulfer hexafluoride (SF6), at 0 PSI, is how much greater than dry air?
2 1/2 times.
10Why are high-voltage fuses enclosed?
To keep melted metal from dropping into nearby equipment.
11What is installed inside the insulated fiberglass tube assembly to complete the connection between the upper and lower contacts on the fuse holder?
Fuse link.
12How can a craftsmen easy identify blown fuse cutout?
A cutout door is hanging down.
13What percent of electrical system faults are temporary?
95.
14Which of these devices does not interrupt a fault current?
Sectionalizer.
15Where are overhead switches normally mounted?
On substation structures or utility poles.
16What is required for a gang operated overhead switch on a 3-phase circuit?
Three sets of blades and contacts.
17What is usually installed with an oil circuit breaker to allow for equipment maintenance and allows you to keep the circuit in operation?
Knife blades and normally open air-break switch.
18The oil in oil circuits breakers is checked dielectrically.
every 6 months.
19Strong odor from the gas in a sulfur hexafluoride circuit breaker is an indication that.
gas decomposition has taken place.
20Clean a modern air switch that has been closed for a long time by.
opening and closing the switch several times.
21Battery bank maintenance is normally done.
every month.
22What is used to test a battery cell for its specific gravity?
Hydrometer syringe.
23Switchboard graphic instruments and revenue watt-hour meters must be calibrated every.
4 years.
24Which device is essentially a voltage regulator and requires similar servicing?
Distribution transformer.
25The maintenance interval for voltage regulators is every.
year.
26Battery electrolyte impurities cause.
Irregular cell operation.
27After repair work on a relay you must.
make a complete performance test.
28What publication outlines how to perform a flash hazard analysis to determine personal protective equipment requirement?
National Fire Protection Association (NFPA) 70 E.
29Leather protectors or gauntlets should be.
2 to 5 inches shorter than the rubber gloves.
30Which of these combinations are you likely to use inside rubber gloves?
Cotton gloves and dusting powder.
31The supervisor must visually inspect rubber blankets every.
6 months.
32How must rubber blankets be stored?
Flat or rolled in blanket canister.
33While working, what must be done if your rubber gloves come in contact with petroleum based products?
Wipe them off quickly.
34While inspecting rubber insulating lines hoses, which condition would require the line hose to be removed from service?
Damage extending 1/4 of the wall thickness.
35What is used to clean nylon parts of body work positioning equipment?
Mild soap and water.
36When leather cannot be made soft and pliable enough by saddle-soap dressing, it should be.
oiled
37Which part of the gaff do you sharpen?
Flat inner side.
38How should you plan your climbing route with respect to single crossarm?
Opposite the crossarm.
39When two workers are ascending a pole, the second worker must not start climbing until.
The first one is in a safe work position.
40Which of the following manufacturer's certification tests is acceptable for hotsticks?
100,000 volts AC per foot 5 minutes on fiberglass and epoxy sticks.
41Hot sticks are electrically tested with a.
direct current (DC) hi-pot test set.
42How long is the 100-kilovolts (kV) test voltage applied to a hot stick?
1 minute
43At the job site, the aerial lift device should be positioned so the work area is always.
within reach of the boom.
44Materials or tools can only be passed from a worker on the ground to a worker on the aerial lift vehicle when.
both workers are wearing rubber gloves.
45The test voltage for an aerial lift basket test is.
100 kilovolts (kV) direct current (DC).
46The line truck winch is operated
through the power takeoff.
47How is the rope put on the capstan?
Wind it clockwise, with the load end next to the truck.
48The purpose of hand signals is to ensure
clear communication between truck operator and ground worker.
49What does holding up a closed fist indicate?
Stop all action.
50Which of these is Operator's Inspection Guide and Trouble Report (Aircraft Towing, Base Maintenance, Deicers, High Reach and Snow Removal), on which you write up line truck inspection discrepancies?
AF Form 1800
51What is the more common name for a constant current transformer?
Constant current regulator.
52The insulation value of transformer coils, bushings, and oil determines
The voltage rating of the transformer.
53When you make a delta-delta connection for lights and power, there is one unusable voltage from
B phase to C phase.
54Which meter do you use in a transformer continuity check?
Megger.
55Which connection would you use for a continuity check on the primary winding of a transformer?
H1 to H2.