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3E051 Set D Book1
| Question | Answer |
|---|---|
| 1. The preferred Air Force base distribution system is | 3-Phase-4 Wire |
| 2. A substation with one incoming transmission circuit and three outgoing distribution circuits has (at least) how many lightning arresters? | 12 |
| 3. Which item supplies control voltage to operate circuit breakers? | Batteries |
| 4. 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 |
| 5. In regards to the circuit how are a step-voltage regulator's primary and secondary windings configured? | 12 |
| 6.When can the secondary of a current transformer be opened? | When the primary is deenergized |
| 7. Which is not a major function of an oil circuit breaker? A. Provide switching under load B. To stabilize current flow during an overload situation C. To protect system by automatically opening when fault occurs D.Minimize damage to a system by open | To stabilize current flow during an overload situation |
| 8. What oil circuit breaker components supply amperage to the protective relays? | Current Transformers |
| 9. What percent of electrical system faults are temporary? | 95 Percent |
| 10. Of these devices, which does not interrupt a fault current? Fused Cutout Sectionalizers Oil Circuit breaker Oil Current Recloser | Sectionalizer |
| 11. Air-Break switches can be used to break a circuit "under load" if they have | Arc Horns |
| 12. Why is the arc extinguished so quickly in a vacuum recloser? | There is very little oxygen to burn |
| 13. The insulating quality of sulfur hexaflouride (SF6), at 0 PSI, is who much greater than dry air? | 2 1/2 times |
| 14. A high-voltage switch is connected to the distribution system that it is to protect in | Series |
| 15. 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 |
| 16. Oil circuit breaker contacts that are discolored by excessive heat should be | Replaced |
| 17. Dielectrically check the oil in oil circuit breakers | Every 6 months |
| 18. Which of these acids mixed with water is an effective solution for cleaning insulators and bushings? Boric, Lactic, Muriatic, Sulfuric | Muriatic |
| 19. What do you use to clean the arc interrupters of an air-break switch? | Cloth or light sanding. |
| 20. Clean a modern air switch that has been closed for a long time by | Opening and closing the switch several times |
| 21. Battery bank maintenance is normally done, how often | Monthly |
| 22. 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 | 1,500 Volts |
| After a wiring change to a control device, check substation circuits for | Proper operation |
| Switchboard graphic instruments and revenue watt-hour meters must be calibrated every? | 4 Years |
| Which device is essentially a voltage regulator and requires similar servicing? Air-Break switch, Over current Relay, Oil Circuit breaker, Distribution Transformer | 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? | 0.8% |
| What must you do after repair work on a relay? | Make a complete performance test |
| Which meter do you use in a transformer continuity check? | Megger |
| If a continuity check between the primary and the secondary transformer windings shows a zero reading the transformer is probably | Open |
| What publication outlines how to perform a flash hazard analysis to determine personal protective equipment requirement? | National Fire Protection Association 70 E |
| Hard hats must meet ANSI289.1 Class E requirements 20,000 V av test for how many minutes? | 3 |
| Proper wear of arcflash resistant clothes includes? Coveralls worn with... Metallic Fasteners, Sleeves rolled up, Sleeves rolled down, Top tied around the waist | Coveralls worn with sleeves rolled down. |
| How often should the supervisor inspect body belts for safety straps? | Every 6 Months |
| Which of these is used for a bending test on a body belt or safety strap? Crossarm, Cable Reel, Lineman's wrench, 3/4 inch Mandrel | 3/4 inch Mandrel |
| Which of these is not a way to tell whether gaffs are sharpened properly? Gauging, Plane Test, Slope Test, Pole Cutout | Pole Cutout |
| Which part of the gaff do you sharpen? Top Ridge, Outer Ridge, Rounded Edge, Flat Inner Side? | Rounded Edge |
| What is the required rhythm method when climbing a utility pole? (which foot rises with which arm) | Left arm rises 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? A. 4 Inches Longer than the rubber gloves B. 1 to 3 Inches Longer than the rubber gloves C. The same length as the rubber gloves. D. 2 to 5 inches shorter than the rubber gloves | D. 2 to 5 Inches shorter than the rubber gloves |
| For full protection up to the shoulder, rubber sleeves are? A. Worn tucked into rubber gloves B. Worn on the outside of rubber gloves C. Cuffed even with the top of the gloves D. Worn between rubber gloves and gauntlets | A. Worn tucked into rubber gloves |
| Which of these combinations are you likely to use inside rubber gloves? A. Nylon Gloves and hand cream B. Cotton Gloves and hand cream C. Nylon Gloves and dusting powder D. Cotton Gloves and dusting powder | D. 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 a blanket canister |
| Which of the following manufacture's certification tests is acceptable for hot sticks? 75,000 AC, 75,000 DC, 100,000 AC, 100,000 DC? | 100,000 Volts AC 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? Megger, voltmeter, DC Hi-pot test set, High-Voltage phasing tool | DC Hi-Pot test set |
| How many high-voltage tests are made on a hot stick before it can pass? | Four 1-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? A. In which the bucket is moving B. Away from the cab of the truck C. of the groundman giving signals D. of the pole or equipment to be worked on | A. 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 receive a daily? | Pretest inspection and periodic verification test |
| The moisture test setup is the same as the? Liner test, basket test, pretest inspection, upper boom insulation test | Upper boom insulation test |
| Who is responsible for daily inspection and overseeing other testing on the aerial lift truck? | Principle 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 high side of the truck |
| How is the rope put on the capstan? | Wind it clockwise, with the load end next to the truck |
| Holding up a closed fist indicates what? | Stop all action |
| The key to using hand signals is what? | All operators and co-workers understand signals to used |
| Which of these is the 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 1806 |
| Which of the following does the motor pool handle? Low Oil, Tire Change, Low tire pressure, Low battery water | Low oil |
| 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 which the line is to pass | A Survey Crew |
| Use AF Form 103, Base Civil Engineering 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 handling? | 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 you used to load poles on a trailer? | Boom Method |
| In determining the class of a pole, how far up from the pole's butt do you measure its circumference? | 6 feet |
| 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 |
| 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 Pole Guard |
| Which of these is the best situation for backfilling a pole hole? A. 1 Tamper 3 shovels B. 1 shovel 3 tampers C. 1 tamper 1 raker 2 shovels D. 1 shovel one tamper 2 rakers | B. 1 shovel 3 tampers |
| What is the maximum amount of pole line angle you can have without needing a guy wire? | 5° |
| What type of anchor do we use for hand 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 do you use to draw up a guy wire and hold its place for attachment to the anchor rod? A. Crimps and winch line B. Chain hoist and two strand grips C. Sheave attachment and cable puller D. Cable attachment and two thimble- | B. Chain hoist and two strand grips |
| What are the considered factors that establish the three loading areas conductors in the United States? | Longitudinal, transverse, and vertical loading |
| What insulator material is more resistant to vandalism? | Glass |
| What knots does the person on the ground use to raise a crossarm? | Half Hitch and clove hitch |
| Use armor rod on | Aluminum conductors |
| You are building a new pole line; which conductor does the person on the ground send up first if you are on the second pole. | The inside conductor |
| With what spice do you have to chooser the correct size die? | Compression |
| What do you do to prevent a hot-line clamp from burning a main conductor? | Use a stirrup |
| What type of insulator is used at the dead end for a primary conductor? | Suspension insulator |
| What information do you need to find the proper amount of sag? | Span length, conductor type temperature and loading district |
| Pad mounting transformers is the preferred mounting method used for what transformer size? | 225 kVA |
| Which method do we most likely use to install light, single-phase transformers? | Block and tackle |
| where do you connect the top and bottom connection points of a transformer;s lightning arrester? | 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? | Capacitors |
| What device do we use across a capacitor's terminals to gradually discharge the capacitor? | Shorting stick |
| For a below-ground check of a pole, to what depth do you dig the trench? | 8-18 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, (what is the cause) | the conductor has stretched from being hit by a falling object |
| We must make voltage and current readings on capacitor installations at least (how often)? | Annually |
| Where would you put the tree pruner to add a third section? | Lay it flat on the ground |
| 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 volt insulated rubber or synthetic-covered flexible copper |
| The first connection you make in applying a ground set is the? | Ground |
| When 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 arrester that has been damaged by a stoke of lightning what do you also check for damage? | 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 hot-line clamp |
| On energized conductors, we keep the tie wires short when removing them from the insulator because this? (does what) | Prevents the tie wire from contacting other phases |
| What tie stick head do we normally use to untie tie wires? | Fixed Head |
| What do we use to raise the auxiliary crossarm assembly once we untie the tie wires? | Wire tongs |
| 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 auxiliary arm? | 3 to 4 feet |
| The High voltage audible indicator makes an audible sound when placed (where)? | in an electrostatic field |
| The act of trying to 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 through-bolt? A. On top of the pole B. Lineman's safety strap C. Secured to the handline D. Resting on a screwdriver | B. Linemen's Safety Strap |
| The service meter normally measures? (what) | Kilowatt-Hours |
| What is the formula to find the amount of watt-hours used? | Power factor times wattage |
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