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3E051 Set D book 1
| Question | Answer |
|---|---|
| The preferred Air Force base distribution system is | 3-phase, 4-wire |
| A substation with one incoming transmission circuit and three outgoing distribution cirdcuits has (at least) how many lighting arresters? | 12 |
| Which item supplies control voltage to operate circuit breakers? | batteries |
| What is the configuration of an induction-voltage regulator's primary and secondary windings? | the primary is in shunt and the secondary is in series |
| In regards tko the circuit, how are a step-voltage regulator's primary and secondary windings configured? | primary is in parallel and secondary is in series |
| When can the secondary of a current transformer be opened? | when the primary is deenergized |
| Which is not a major funtion of an oil circuit breaker? | to stabilize current flow during an overload situation |
| What oil circuit breaker components supply amperage to the protective relays? | current transformer |
| What percent of electrical system faults are temporary? | 95 percent |
| Of these devices, which does not interrupt a fault current? | sectionalizer |
| Air-break switches can be used to break a circuit "under load" if they have | arc horns |
| Why is the arc extinguished so quickly in a vacuum recloser? | there is very little oxygen to burn |
| The insulating quality of sulfur hexafluoride (SF6), at 0 PSI, is how much greater than dry air? | 2.5 times |
| A high voltage switch is connected to the distribution system that it is protecting in | loop |
| What is usually installed with an oil circuit breaker to allow for equipment maintenance, letting you keep the circuit in operation? | knife blades and a normally open air-break switch |
| Oil circuit breaker contacts that are discolored by excessive heat should be | replaced |
| Dielectric check the oil in oil circuit breakers | every 6 months |
| Which of these acids mixed with water is an effective solution for cleaning insulators and bushings? | muriatic |
| What do you use to clean the arc interrupters of an air-break switch? | cloth or light sanding |
| Clean a modern air switch that has been closed for a long period of lim by | opening and closing the switch several times |
| Battery bank maintenance is normally done | monthly |
| What do we use to test a battery cell for its specific gravity? | hydrometer syringe |
| What must you do if you add water to a battery in freezing temperatures? | charge the battery |
| The dielectric test voltage for a relay that is rated at 600 volts is | 2200 volts |
| After a wiring change to a control device, check substation circuits for | proper operations |
| Switchboard graphic instruments and revenue watt-hour meters must be calibrated every | 4 years |
| What device is essentially a voltage regulator and requires similair servicing? | distribution transformer |
| What is the first step in isolating a voltage regulator? | place regulator in the neutral or zero position |
| For each degree below 77 F, battery capacity is reduced by what percent? | .8 |
| What must you do after repair work on a relay? | make a complete performace test |
| Which meter do you use in a transformer continuity check? | megger |
| If a continuity check between the primary and secondary transformer windings shows a zero reading, the transformer is probably | shorted |
| What publication outlines how to perform a flash hazard analysis to determine personal protective equipiment requirement? | NFPA 70 E |
| Hard hats must meet ANSI 289.1 Class E requirements 20,000 VAC test for how many minutes? | 3 |
| Proper wear of arcflash resistant cloths includes? | coveralls worn with sleeves rolled down |
| How often should the supervisor inspect body belts and safety straps? | every 6 months |
| Which of these is used for a bending test on a body belt or safety strap? | 3/4 inch mandrel |
| Which of these is not a way to tell whether gaffs are sharpened properly? | slope test |
| Which part of the gaff do you sharpen? | flat inner side |
| What is the required rhythm method when climbing a utility pole? | left arm raises as left foot rises |
| What is the OSHA standard for retraining of climbing tasks performed less than once per year? | annually |
| Leather protectors or gauntlets should be | 2 to 5 inches shorter than the rubber gloves |
| For full protection up to the shoulder, rubber sleeves are | worn tucked into rubber gloves |
| Which of these combinations are likely to use inside rubber gloves? | cotton gloves and dusting powder |
| How often are rubber gloves given an electrical test? | every 6 months |
| The supervisor must inspect rubber blankets visually every | 6 months |
| How must rubber blankets be stored? | flat or rolled in blanket canister |
| Which of the following manufacturer's certification test is acceptable for hotsticks? | 100,000 VAC per foot for 5 minutes on fiberglass and epoxy sticks |
| How often are hot-line tools tested electrically? | every 6 months |
| Test hot sticks electrically with a | DC hi-pot test set |
| How many high-voltage test are made on a hot stick before it can pass? | 4 one-foot segment tests and one overall test |
| At the job site, the aerial lift device should be positioned so the work area is always | within reach of the boom |
| While raising the bucket, the operator should always face in the direction | in which the bucket is moving |
| Materials 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 |
| All in-use aerial devices must recieve a daily | pretest inspection and periodic verification test |
| The moisture test setup is the same as the | upper boom insulation test |
| Who is responsible for daily inspections and overseeing other testing on the aerial lift truck? | principal operator |
| The line truck winch is operated | through the power takeoff |
| When you must work on a slope, position the truck so the work is | on the high side of the truck |
| How is the rope put on the capstan? | wind it clockwise, wiuth the load end next to the truck |
| Holding up a closed fist indicates what? | stop all action |
| The key to using hand signal is what? | All signals are approved by the Air Force |
| Which of these is the Operator's Inspection Guide and Trouble Report on which you write up line truck inspection discrepancies? | AF form 1806 |
| Which of the following does the motor pool handle? | tire change |
| While you are operating the line maintenance truck, which gauge is the most important to watch? | tachometer |
| In addition to engineers or the planning Section, who assists in making a "staking sheet" of the area over whick the line is to pass? | a survey crew |
| Use AF Forsm 103, Base CE work clearance request for | digging permits |
| For poles that are subject to more strain than normal, how many inches deeper do we set them? | 6 |
| What method do we use to remove dirt from a power auger? | by spinning it off |
| What is the minimum number of workers needed for pole handleing? | 2 |
| What tool do workers use to position poles on the ground? | cant hook |
| Sort a large number of poles to be stored by | length |
| What method do we usually use to load poles on a trailer? | boom method |
| In determining the class of a pole, how far up from the pole's butt do we measure it's circumference? | 6 foot |
| What type of roof do we find on untreated wood poles? | slant |
| What must you do before you cut the roof on a wood pole? | find the pole's face side and back side |
| Where do we make the gain on a wood pole? | face side of the pole |
| In using the line truck and winch to set a pole, attach the winch line before you raise the pole slightly | above the midpoint of the pole |
| If a pole must be set in an energized line, what two additional articles of equipment must be used? | rubber gloves and a pole gaurd |
| Which of these is the best situation for backfilling a pole hole? | one shoveler and 3 tampers |
| What is the maximum amount of pole line angle you can have without needing a guy wire? | 5 degrees |
| What type of anchor do we use for hard or compact soil? | expanding anchor |
| What type of guy do we normally use at a curve in the line? | side guy |
| Which of these combinations fo you use to draw up a guy wire and hold it in place for attachment to the anchor rod? | chain hoist and 2 strand grips |
| What are the considered factors that establish the three loading areas for conductors in the US? | longitudinal traverse and vertical loading |
| What insulator material is more resistant to vandalism? | fiberglass |
| What knots does the person on the ground use to raise a crossarm? | half hitch ad a clove hitch |
| Use armor rod on | aluminum conductors |
| You are building a new pole line; which onductor does the person on the ground send up first is you are on the second pole | the inside conductor |
| With what splice do you have to choose the correct size die? | compression |
| What do you do to prevent a hot-line clamp from burning a main conductor? | use a stirrup |
| what information do you need to find the proper amount of sag? | span length, conductor type, temperature and loading district |
| What type of insulator is used at the dead end for a primary conductor? | susspension insulator |
| pad mount transformers is the perferred mounting method for what transformer size? | 225 kVA |
| Which method do we most likely use to install, single-phase transformer? | block and tackle |
| Where do you connect the top and bottom connection points of a transformer's lighting arrestor? | top to primary wire, bottom to ground wire |
| What causes a low power factor on a distribution line? | large induction load in the circuit |
| What can we install to raise the power factor in a distribution circuit? | transformers |
| What device do we use across a capacitor's terminals to gradually discharge the capacitor? | resistor |
| For a below-ground check of a pole, to what depth do you dig the trench? | 8 to 18 inches |
| At what location on a crossarm does decay usually start? | pin holes |
| What condition can cause a crossarm to twist? | unbalanced strain or insufficient guying |
| When a span shows too much sag while adjacent spans appear normal, | the conductor has streched from being hit by a falling object |
| We must make voltage and current readings on capacitor installation at least | 4 times per year |
| Where would you put the tree pruner to add a thirs section? | lean it against a tree limb |
| To remove a limb, where do you make the last cut? | flush with the trunk or parent limb |
| Which device can you use to detect a problem before service is interrupted? | infrared detector |
| What must the electrician do before working on deenergized lines? | test and ground the lines |
| How is the cable used for ground sets constructed? | 600-volts insulated rubber or synthetic-covered flexible copper |
| The first connection you make in applying a ground set is the | ground |
| What a break occurs in an energized line, how is the line at the break affected? | the center disappears, leaving soft wire on either side |
| When you replace an arrestor that has been damaged by storke of lighting, what do you also check for damaged? | ground wire |
| What must you do before working on energized lines? | inspect hot line tools and equipment for proper operation |
| What two connector types do we use when splicing energized conductors? | compression and automatic. |
| On energized conductors, we keep the tie wires short when removing them from the insulator because this | prevents the tie wire from contacting other phases |
| What tie stick head do we normally used to untie tie wires? | rotary blade |
| What do we use to raise the auxiliary crossarm assembly once we untie the tie wires? | a snatch block |
| How many line hoses are needed for a pole change when the pole has a single crossarm supporting three phase conductors? | 8 |
| When replacing a pole, how many feet above the pole do you raise the auxililary arm? | 3 to 4 feet |
| The high voltage audible indicator makes an audible sound when placed | in an electrostatic field |
| The act of tying a tagline to each outside conductor with a bowline knot and pulling the conductors out of the work area we call | tagging out |
| Where do you place the crossarm prior to securing it to the pole with a throughbolt? | lineman's safety strap |
| The service meter normally measures | kW- hours |
| What is the formula to find the amount of watt-hours used? | new reading minus the previous reading |
Created by:
melissafish
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