Substation Equipment & Overhead Systems
Volume one covers the connections and power factors.
- 1.
The preferred Air Force base distribution system is
- A.
34.5 kV
- B.
69 kV
- C.
3-phase,4wire
- D.
Single-phase, 3-wire
Correct Answer
C. 3-pHase,4wireExplanation
The preferred Air Force base distribution system is 3-phase, 4-wire. This system provides three separate phases of electrical power, each with its own conductor, allowing for a balanced distribution of power and efficient operation of electrical equipment. The 4-wire configuration includes three phase conductors and a neutral conductor, providing a return path for unbalanced loads and improving safety. This system is widely used in commercial and industrial applications due to its ability to handle high power loads and provide a reliable and stable power supply.Rate this question:
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- 2.
Which of these equipment items is designed to open a circuit automatically under load and then restore the service quickly once the fault has cleared?
- A.
Fused cutout
- B.
Sectionalizer
- C.
Pole-top switch
- D.
Recloser
Correct Answer
D. RecloserExplanation
A recloser is a type of equipment that is designed to automatically open a circuit under load, meaning that it interrupts the flow of electricity when a fault occurs. Once the fault has cleared, the recloser restores the service quickly by closing the circuit again. This feature allows for a temporary interruption in power supply to prevent further damage or hazards caused by the fault, and then restores the power once the fault is resolved.Rate this question:
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- 3.
Which of the following items supply control voltage to operate circuit breakers?
- A.
Batteries
- B.
Signal generators
- C.
Current transformers
- D.
Distribution transformers
Correct Answer
A. BatteriesExplanation
Batteries are used to supply control voltage to operate circuit breakers. Circuit breakers require a source of power to operate, and batteries provide a reliable and consistent source of control voltage. Batteries are commonly used in various electrical systems to ensure the proper functioning of circuit breakers and other control devices. They are able to supply the necessary voltage to trip or close the circuit breaker when needed, ensuring the safety and efficiency of the electrical system.Rate this question:
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- 4.
What are the minimum requirements for a substation fence?
- A.
Two strands of barbed wire above a 6-foot-high fence
- B.
Two strands of barbed wire above a 7-foot-high fence
- C.
Three strands of barbed wire above a 6-foot-high fence
- D.
Three strands of barbed wire above a 7-foot-high fence
Correct Answer
D. Three strands of barbed wire above a 7-foot-high fenceExplanation
The minimum requirements for a substation fence are three strands of barbed wire above a 7-foot-high fence. This ensures that the fence is adequately secured and provides a deterrent for unauthorized access. The height of the fence helps to prevent climbing over, while the three strands of barbed wire further discourage any attempts to breach the fence.Rate this question:
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- 5.
How many feet past the substation fence must the perimeter ground wire extend?
- A.
2
- B.
5
- C.
8
- D.
10
Correct Answer
A. 2Explanation
The perimeter ground wire must extend 2 feet past the substation fence.Rate this question:
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- 6.
What item in an oil circuit breaker suppresses an arc?
- A.
Oil
- B.
Dashpot
- C.
Protective relay
- D.
Current transformer
Correct Answer
A. OilExplanation
Oil is the correct answer because it is used in an oil circuit breaker to suppress an arc. When a fault occurs in the circuit, the oil acts as an insulating medium and quickly absorbs the heat generated by the arc, preventing its further propagation. The oil also helps in extinguishing the arc by cooling and quenching it, thus protecting the circuit breaker and the surrounding equipment from damage.Rate this question:
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- 7.
Which is not a major function of an oil circuit breaker?
- A.
To provide a means of switching under load
- B.
To stabilize current flow during an overload situation
- C.
To protect the system by automatically opening the circuit when a fault occurs
- D.
To minimize damage to a system by openning the circuit when a overload occurs
Correct Answer
B. To stabilize current flow during an overload situationExplanation
The correct answer is "To stabilize current flow during an overload situation." This is because the main function of an oil circuit breaker is to provide a means of switching under load, protect the system by automatically opening the circuit when a fault occurs, and minimize damage to a system by opening the circuit when an overload occurs. Stabilizing current flow during an overload situation is not a major function of an oil circuit breaker.Rate this question:
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- 8.
What OCB component supplies amperage to the protective relays?
- A.
Timer ports
- B.
Main contacts
- C.
Terminal bushings
- D.
Current transformers
Correct Answer
D. Current transformersExplanation
Current transformers supply amperage to the protective relays. These transformers are designed to convert high currents into lower, more manageable currents that can be used by the relays. They are typically connected in series with the circuit being monitored and provide accurate and proportional current measurements to the relays. This allows the relays to detect any abnormal current conditions and initiate protective actions to prevent damage to the electrical system. Timer ports, main contacts, and terminal bushings do not directly supply amperage to the protective relays, making them incorrect options.Rate this question:
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- 9.
What percent of eletrical system faults are temporary?
- A.
25%
- B.
55%
- C.
75%
- D.
95%
Correct Answer
D. 95%Explanation
Temporary electrical system faults are common and usually occur due to transient conditions such as power surges or momentary interruptions. These faults are typically resolved quickly and do not cause long-term damage to the system. Therefore, it is likely that a significant majority, or 95%, of electrical system faults are temporary in nature.Rate this question:
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- 10.
Of these devices, which does not interrupt a fault current?
- A.
Fused cutout
- B.
Sectionalizer
- C.
Oil Circuit breaker
- D.
Oil Circuit recloser
Correct Answer
B. SectionalizerExplanation
A sectionalizer is a device used in electrical distribution systems to isolate faulty sections of the network. It does not interrupt fault currents, but rather identifies and isolates the specific section where the fault occurred. This allows for quicker restoration of power to unaffected areas and minimizes downtime. In contrast, a fused cutout, oil circuit breaker, and oil circuit recloser are all designed to interrupt fault currents and protect the electrical system from damage.Rate this question:
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- 11.
Which of these devices must be backed up by a recloser of proper size?
- A.
Fused cutout
- B.
Transformer
- C.
Sectionalizer
- D.
Lightning arrester
Correct Answer
C. SectionalizerExplanation
A sectionalizer is a device used in electrical distribution systems to isolate faulty sections of the network. It helps in identifying and localizing faults, which allows for quicker restoration of power and reduces the impact of outages. Since a sectionalizer plays a crucial role in maintaining the reliability of the electrical system, it must be backed up by a recloser of proper size. A recloser is a protective device that automatically restores power after a temporary fault by interrupting and reclosing the circuit. By having a recloser backing up the sectionalizer, any faults can be quickly cleared, minimizing downtime and improving the overall reliability of the system.Rate this question:
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- 12.
Why is the Arc extinguished so quickly in a vacuum recloser?
- A.
The high-voltage contacts separate so fast
- B.
There is very little oxygen to burn
- C.
The oil absorbs the fault current
- D.
Halon is used as an extinguisher
Correct Answer
B. There is very little oxygen to burnExplanation
In a vacuum recloser, the arc is extinguished quickly because there is very little oxygen to burn. In a vacuum environment, the absence of oxygen prevents the arc from sustaining and allows it to be extinguished rapidly.Rate this question:
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- 13.
The insulating quality of sulfur hexafluoride (SF6), At 0 PSI, is how much greater than dry air?
- A.
2 1/2 times
- B.
4 times
- C.
6 1/2 times
- D.
8 times
Correct Answer
A. 2 1/2 timesExplanation
Sulfur hexafluoride (SF6) has an insulating quality that is 2 1/2 times greater than dry air at 0 PSI. This means that SF6 is a more effective insulator compared to dry air, providing better insulation and preventing the flow of electricity more efficiently.Rate this question:
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- 14.
What is usually installed with an oil circuit breaker to allow for equipment maintenance, letting you keep the circuit in operation?
- A.
Fused cutouts
- B.
Knife blades
- C.
Fused cutout and a backup oil circuit recloser
- D.
Knife blades and a normally open air-break switch
Correct Answer
D. Knife blades and a normally open air-break switchExplanation
Knife blades and a normally open air-break switch are usually installed with an oil circuit breaker to allow for equipment maintenance while keeping the circuit in operation. The knife blades provide a means to isolate the circuit breaker from the power source, allowing for safe maintenance work to be carried out. The normally open air-break switch provides an additional safety measure by providing a physical air gap in the circuit, ensuring that no current flows through the breaker during maintenance. This combination of knife blades and a normally open air-break switch allows for efficient and safe maintenance of the circuit breaker.Rate this question:
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- 15.
Oil circuit breaker contacts that are discolored by excessive heat should be
- A.
Filed
- B.
Dressed
- C.
Adjusted
- D.
Replaced
Correct Answer
D. ReplacedExplanation
When the contacts of an oil circuit breaker are discolored by excessive heat, it indicates that they have been damaged and are no longer functioning properly. Discoloration is often a result of overheating, which can lead to a loss of conductivity and potentially cause a circuit breaker to fail. In such cases, it is necessary to replace the contacts with new ones to ensure the breaker's reliable operation and prevent any potential electrical hazards.Rate this question:
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- 16.
The oil in oil circuit breakers (OCB) should be checked dielectrically
- A.
Monthly
- B.
Every 3 months
- C.
Every 6 months
- D.
Yearly
Correct Answer
C. Every 6 monthsExplanation
The oil in oil circuit breakers (OCB) should be checked dielectrically every 6 months. This is because dielectric testing is performed to ensure the insulation properties of the oil are still effective. By checking the dielectric strength, any degradation or contamination of the oil can be detected, which is crucial for the proper functioning of the circuit breaker. Regular checks every 6 months help to maintain the integrity and reliability of the OCB.Rate this question:
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- 17.
Scheduling maintenenance on an oil circuit recloser depends on the
- A.
High-voltage rating and the average load
- B.
Climatic conditions of the local area and past maintenance records
- C.
Types of overcurrent and overvoltage relays and the cleanliness of the insulator bushings.
- D.
Severity and number of reclosing operations and the dielectric strength of the insulating oil.
Correct Answer
D. Severity and number of reclosing operations and the dielectric strength of the insulating oil.Explanation
The severity and number of reclosing operations and the dielectric strength of the insulating oil are important factors to consider when scheduling maintenance on an oil circuit recloser. Reclosing operations can put stress on the equipment, and the severity and frequency of these operations can indicate the level of wear and tear on the recloser. Additionally, the dielectric strength of the insulating oil is crucial for the proper functioning of the recloser, as it helps to prevent electrical breakdown and maintain insulation integrity. Therefore, considering these factors is essential for ensuring the reliability and longevity of the recloser.Rate this question:
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- 18.
Strong odor from the gas in a sulfur hexaflouride circuit breaker is an indication that
- A.
Breaker load is too high
- B.
Gas pressure is too high
- C.
Gas decomposition has taken
- D.
Insulation breakdown has taken place
Correct Answer
C. Gas decomposition has takenExplanation
place.Rate this question:
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- 19.
Clean a modern air switch that has been closed for a long time by
- A.
Using a clean cloth and a wire brush
- B.
Using wire wool and silicon grease
- C.
Sanding lightly with emery cloth
- D.
Opening and closing the switch several times
Correct Answer
D. Opening and closing the switch several timesExplanation
Opening and closing the switch several times can help remove any dirt or debris that may have accumulated over time, allowing the switch to function properly. This action can help loosen any stuck parts and improve the electrical connection within the switch. It is a simple and effective method to clean a switch that has been closed for a long time.Rate this question:
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- 20.
Battery bank maintenance is normally done
- A.
Monthly
- B.
Every 6 monthly
- C.
Yearly
- D.
Every 5 Years
Correct Answer
A. MonthlyExplanation
Battery bank maintenance is typically performed on a monthly basis. This ensures that the batteries are regularly inspected, cleaned, and tested to maintain their optimal performance and longevity. Monthly maintenance allows for early detection of any issues or potential problems, such as corrosion, loose connections, or battery degradation. By conducting regular checks and maintenance, any necessary repairs or replacements can be done promptly, preventing any major damage or failure of the battery bank. Additionally, monthly maintenance ensures that the battery bank remains in good working condition and can provide reliable power when needed.Rate this question:
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- 21.
What is used to test a battery cell for its specific gravity?
- A.
Litmus paper
- B.
Barometric gauge
- C.
Colormetric chart
- D.
Hydrometer Syringe
Correct Answer
D. Hydrometer SyringeExplanation
A hydrometer syringe is used to test a battery cell for its specific gravity. A hydrometer measures the density of a liquid, and in this case, it measures the specific gravity of the battery's electrolyte. By using a hydrometer syringe, one can extract a sample of the electrolyte and measure its specific gravity to determine the state of charge of the battery cell. This information is important in assessing the health and performance of the battery.Rate this question:
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- 22.
What must be done if water is added to a battery in freezing temperatures?
- A.
Warn the battery
- B.
Charge the battery
- C.
Add a teaspoon of antifreeze
- D.
Mix the solution with a stainless steel rod
Correct Answer
B. Charge the batteryExplanation
In freezing temperatures, water can freeze and expand, causing damage to the battery. Charging the battery helps to prevent freezing by keeping the electrolyte solution in motion, which lowers the freezing point. This ensures that the battery remains functional and prevents any potential damage that could occur due to freezing water.Rate this question:
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- 23.
Dielectric test voltage for a realy rated at 600 volts is
- A.
400 volts
- B.
1,500 volts
- C.
2,200 volts
- D.
6,600 volts
Correct Answer
C. 2,200 voltsExplanation
The dielectric test voltage for a relay rated at 600 volts is 2,200 volts. This test voltage is higher than the rated voltage of the relay to ensure that it can withstand higher voltage surges or transients that may occur in the electrical system. By subjecting the relay to a higher voltage during the testing, any potential weaknesses or insulation breakdowns can be identified and rectified before the relay is put into operation.Rate this question:
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- 24.
After a wiring change to a control device, substation circuit should be checked for
- A.
Proper operation
- B.
Proper adjustment
- C.
Adeqate clearances
- D.
Tightness of connections
Correct Answer
A. Proper operationExplanation
After a wiring change to a control device, it is important to check the substation circuit for proper operation. This is necessary to ensure that the circuit is functioning correctly and that the wiring change has not caused any issues or malfunctions. Checking for proper operation helps to identify any potential problems or errors that may have occurred during the wiring change, allowing for timely repairs or adjustments to be made. It is crucial to ensure the safety and efficiency of the substation circuit by verifying its proper operation after any changes are made.Rate this question:
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- 25.
What is the maintenance interval for voltages regulators?
- A.
Monthly
- B.
Every 6 months
- C.
Annually
- D.
Every 5 years
Correct Answer
C. AnnuallyExplanation
Voltage regulators are devices used to maintain a steady voltage level in electrical systems. The maintenance interval for voltage regulators is typically set to annually. This means that the regulators should be inspected, tested, and serviced once a year to ensure their proper functioning. Regular maintenance helps to identify and address any potential issues or malfunctions, preventing any damage to the electrical system and ensuring the voltage regulators continue to operate efficiently.Rate this question:
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- 26.
What is the first step in isolating a voltage regulator?
- A.
Test for voltage
- B.
Close the air-break switch
- C.
Pull fused cutouts on the line side
- D.
Place regulator in the neutral or zero position
Correct Answer
D. Place regulator in the neutral or zero positionExplanation
The first step in isolating a voltage regulator is to place it in the neutral or zero position. This is important because it disconnects the regulator from the power source and ensures that no voltage is being supplied to the regulator. By placing the regulator in the neutral or zero position, it becomes safe to work on and perform any necessary maintenance or repairs.Rate this question:
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- 27.
Battery electrolyte impurities causes
- A.
Irregular cell operation
- B.
Low specific gravity reading
- C.
High specific gravity reading
- D.
Extreme high gassing of the battery
Correct Answer
A. Irregular cell operationExplanation
Battery electrolyte impurities can cause irregular cell operation. When impurities are present in the electrolyte, they can interfere with the chemical reactions happening inside the battery cells. This interference can disrupt the flow of electrons and ions, leading to inconsistent and unreliable cell operation. Impurities can also cause degradation of the electrodes, reducing their efficiency and overall battery performance. Therefore, it is important to ensure that the electrolyte used in batteries is free from impurities to maintain proper cell operation.Rate this question:
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- 28.
What must be done after repairs work on a relay
- A.
Notify electrical supervisor
- B.
Make a relay dielectric test
- C.
Match the tap block setting with other relays
- D.
Make a complete performance test
Correct Answer
D. Make a complete performance testExplanation
After repairs work on a relay, it is important to conduct a complete performance test. This is necessary to ensure that the relay is functioning properly and to verify that the repairs have been successful. A performance test will help identify any potential issues or malfunctions in the relay, allowing for necessary adjustments or further repairs to be made if needed. It is a crucial step in the maintenance process to ensure the reliability and efficiency of the relay.Rate this question:
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- 29.
Which meter is used in a transformer coninuity check
- A.
Megger
- B.
Ohmmeter
- C.
Voltmeter
- D.
Clamp-on ammeter
Correct Answer
A. MeggerExplanation
A Megger is used in a transformer continuity check. A Megger is a specialized type of insulation resistance tester that is designed to measure the insulation resistance of electrical equipment, including transformers. It applies a high voltage to the equipment and measures the current flowing through the insulation. By measuring the insulation resistance, the Megger can determine if there are any faults or leaks in the insulation of the transformer, which is crucial for ensuring its proper functioning and safety.Rate this question:
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- 30.
If a continuity check between the primary and secondary transformer winding shows a zero reading, the transformer is probably
- A.
Good
- B.
Open
- C.
Shorted
- D.
Grounded
Correct Answer
C. ShortedExplanation
If a continuity check between the primary and secondary transformer winding shows a zero reading, it indicates that there is a direct connection or short circuit between the windings. This means that the transformer is shorted, which can lead to excessive current flow and potentially damage the transformer.Rate this question:
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- 31.
Which of these would you use for a continuity check on the primary winding of a transformer?
- A.
H1 to H2
- B.
X1 to X3
- C.
H1 to X3
- D.
H2 to case
Correct Answer
A. H1 to H2Explanation
To perform a continuity check on the primary winding of a transformer, one would use the H1 to H2 connection. This is because H1 and H2 are the terminals of the primary winding, and checking for continuity between them ensures that there is no break or open circuit in the primary winding.Rate this question:
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- 32.
When leather cannot be made soft and pliable enough by saddle-soap dressing, it should be
- A.
Oiled
- B.
Discarded
- C.
Weight tested
- D.
Inspected for dry rot
Correct Answer
A. OiledExplanation
When leather cannot be made soft and pliable enough by saddle-soap dressing, it should be oiled. Oiling leather helps to restore its flexibility and make it more supple. It helps to moisturize the leather and prevent it from drying out, which can lead to cracking and stiffness. Oiling also helps to maintain the natural oils in the leather, keeping it in good condition and prolonging its lifespan.Rate this question:
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- 33.
How often should the supervisor inspect body belts and sefety straps?
- A.
Before each use
- B.
Weekly
- C.
Monthly
- D.
Every 6 months
Correct Answer
D. Every 6 monthsExplanation
The supervisor should inspect body belts and safety straps every 6 months. This is important to ensure that the equipment is in good condition and can effectively protect the workers. Regular inspections help identify any wear and tear, damage, or defects that may compromise the safety of the belts and straps. By conducting these inspections every 6 months, the supervisor can address any issues and replace or repair the equipment as needed, thus maintaining a safe working environment.Rate this question:
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- 34.
Which of these is used for bending test on a body belt or safety strap?
- A.
Crossarm
- B.
Cable reel
- C.
Lineman's wrench
- D.
3/4-inche mandrel
Correct Answer
D. 3/4-inche mandrelExplanation
A 3/4-inch mandrel is used for bending tests on a body belt or safety strap. This tool is specifically designed to measure the flexibility and durability of these safety equipment. By subjecting the body belt or safety strap to bending around the 3/4-inch mandrel, it can be determined if they can withstand the necessary stress and strain during actual usage. The mandrel provides a standardized test method to ensure that the body belt or safety strap meets the required standards for safety and reliability.Rate this question:
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- 35.
How can you restore damaged or dulled gaffs?
- A.
Grinding
- B.
Steel rasp
- C.
Filing and honing
- D.
Sanding and steel wool
Correct Answer
C. Filing and honingExplanation
To restore damaged or dulled gaffs, filing and honing is the best option. Filing involves using a file to remove any rough or damaged edges, while honing helps to sharpen and refine the gaffs. This process helps to restore the gaffs to their original sharpness and effectiveness. Grinding may be too aggressive and can remove too much material, while a steel rasp may not provide the precision needed for restoring gaffs. Sanding and steel wool may help to smooth the surface but may not effectively restore the sharpness of the gaffs.Rate this question:
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- 36.
Which of these is not a way to tell whether gaff's are sharpened properly?
- A.
Gauging
- B.
Plan test
- C.
Slope test
- D.
Pole cutout
Correct Answer
C. Slope testExplanation
The slope test is not a way to tell whether gaffs are sharpened properly. Gauging involves measuring the thickness of the gaffs to ensure they meet the required specifications. The plan test involves checking the angle and alignment of the gaffs. The pole cutout test involves making a cutout on a pole to test the gaffs' ability to grip and hold. However, the slope test is not a recognized method for assessing gaff sharpness.Rate this question:
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- 37.
Which part of the gaff do you sharpen?
- A.
Top ridge
- B.
Outer ridge
- C.
Rounded edge
- D.
Flat innerside
Correct Answer
D. Flat innersideExplanation
The correct answer is "Flat innerside." This is because the gaff is a fishing hook, and the flat innerside is the part that needs to be sharpened in order to improve its effectiveness in catching fish. Sharpening the flat innerside will make the hook sharper and more likely to penetrate the fish's mouth, increasing the chances of a successful catch.Rate this question:
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- 38.
What is the required rhythm method when climbing a utility pole?
- A.
Right arm rised as left arm rised
- B.
Right arm rises as left foot rises
- C.
Left arm rises as right foot rises
- D.
Left arm rises as let foot rises
Correct Answer
D. Left arm rises as let foot risesExplanation
The correct answer is "Left arm rises as left foot rises". This is the required rhythm method when climbing a utility pole because it ensures proper balance and coordination. By raising the left arm as the left foot rises, it helps maintain stability and allows for a controlled ascent. This rhythm method helps climbers maintain their equilibrium and prevent accidents or falls while climbing the pole.Rate this question:
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- 39.
When two workers are ascending a pole, the second worker must not start climbing until
- A.
The first one is on the ground
- B.
The first one is in a safe work position
- C.
The second one is in a safe work position
- D.
The secon one is directly below the first
Correct Answer
B. The first one is in a safe work positionExplanation
The correct answer is that the second worker must not start climbing until the first one is in a safe work position. This is because it is important to ensure the safety of both workers while ascending the pole. If the first worker is not in a safe work position, it could pose a risk to both workers if the second worker starts climbing. Waiting for the first worker to be in a safe work position ensures that both workers can safely proceed with their task.Rate this question:
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- 40.
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
Correct Answer
D. 2 to 5 inches shorter than the rubber glovesExplanation
Leather protectors or gauntlets should be 2 to 5 inches shorter than the rubber gloves. This is because the leather protectors are worn over the rubber gloves to provide an additional layer of protection. If the leather protectors were the same length or longer than the rubber gloves, they would overlap and interfere with the dexterity and functionality of the gloves. Having the leather protectors shorter allows for ease of movement and ensures that both layers of protection can be worn comfortably.Rate this question:
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- 41.
For full protection up to the sholder, rubber sleeves are
- A.
Worn tucked into rubber gloves
- B.
Worn on the outside of the rubber gloves
- C.
Cuffed even with the top of the gloves
- D.
Worn between rubber gloves and gauntlets
Correct Answer
A. Worn tucked into rubber glovesExplanation
Rubber sleeves are worn tucked into rubber gloves to provide full protection up to the shoulder. By tucking the sleeves into the gloves, it ensures a secure and sealed barrier, preventing any potential exposure to hazardous substances or materials. This method creates a continuous protective layer from the shoulder down to the hands, reducing the risk of contamination or injury.Rate this question:
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- 42.
How often are rubber gloves given an electrical test?
- A.
Once a month
- B.
Every 6 month
- C.
Every 4 month
- D.
Annually
Correct Answer
B. Every 6 monthExplanation
Rubber gloves are given an electrical test every 6 months to ensure their effectiveness and safety. Regular testing is necessary to detect any defects or damage that may have occurred over time, as this can compromise the gloves' insulation properties. By conducting tests every 6 months, any potential risks can be identified and addressed promptly, reducing the chances of accidents or electrical hazards.Rate this question:
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- 43.
The supervisor must inspect rubber blankets visually every
- A.
Week
- B.
Month
- C.
6 months
- D.
Year
Correct Answer
C. 6 monthsExplanation
Rubber blankets must be inspected visually by the supervisor every 6 months. This frequency allows for regular monitoring of the condition of the rubber blankets, ensuring that any potential issues or wear and tear can be identified and addressed in a timely manner. Inspecting the rubber blankets every 6 months strikes a balance between regular inspection and not overburdening the supervisor with excessive inspections.Rate this question:
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- 44.
How must rubber blankets be stored?
- A.
Rolled up and taped
- B.
In a designated truck bin
- C.
Folded and placed in a canvas bag
- D.
Flat or rolled in blanket canister
Correct Answer
D. Flat or rolled in blanket canisterExplanation
Rubber blankets must be stored flat or rolled in a blanket canister. This is because storing them in this manner helps to maintain their shape and prevent any damage or creases. Storing them flat or rolled also makes it easier to access and retrieve the blankets when needed.Rate this question:
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- 45.
Which of the following manufacturer's certification tests is acceptable for hotsticks?
- A.
75,00 volts AC per foot for 5 minutes on fiberglass and epoxy sticks
- B.
75,00 volts AC per foot for 5 minutes on fiberglass and epoxy sticks
- C.
100,000 volts AC per foot for 5 minutes on fiberglass and epoxy sticks
- D.
100,000 volts DC per foot for 5 minutes on fiberglass and epoxy sticks
Correct Answer
C. 100,000 volts AC per foot for 5 minutes on fiberglass and epoxy sticksExplanation
The acceptable manufacturer's certification test for hotsticks is 100,000 volts AC per foot for 5 minutes on fiberglass and epoxy sticks. This test ensures that the hotsticks can withstand high voltage levels and remain functional for a specified duration. The use of AC voltage is specified because hotsticks are primarily used in alternating current systems.Rate this question:
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- 46.
How often are hot-line tools tested electrically?
- A.
Every 6 months
- B.
Annually
- C.
Every 2 years
- D.
Every 5 years
Correct Answer
A. Every 6 monthsExplanation
Hot-line tools are used for electrical work and are subjected to wear and tear over time. Testing them electrically every 6 months ensures that they are in proper working condition and safe to use. This frequent testing helps to identify any potential issues or faults in the tools, allowing for timely repairs or replacements. It also ensures the safety of the workers who use these tools, as any electrical malfunctions can be detected and addressed promptly.Rate this question:
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- 47.
Test hot sticks electrically with a
- A.
Megger
- B.
Voltmeter
- C.
DC hi-pot test set
- D.
High-voltage phasing tool
Correct Answer
C. DC hi-pot test setExplanation
A DC hi-pot test set is used to test the dielectric strength of electrical insulation. It applies a high voltage DC current to the insulation to check if it can withstand the required voltage without breaking down. This test is important to ensure the safety and reliability of electrical equipment. Using a Megger or voltmeter would not be suitable for this purpose as they are used for measuring voltage or insulation resistance, not for testing the dielectric strength. Additionally, a high-voltage phasing tool is used for determining the phase relationship between two conductors, not for testing insulation.Rate this question:
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- 48.
How may high-voltage tests are made on a hot stick before it can pass?
- A.
Four 1-foot segment tests
- B.
Five 1-foot segment test
- C.
Four 1-foot segment tests and one overall test
- D.
Five 1-footsegment tests and one overall test
Correct Answer
C. Four 1-foot segment tests and one overall testExplanation
Before a hot stick can pass, it needs to undergo four 1-foot segment tests and one overall test. This means that the hot stick is tested in four separate 1-foot segments to ensure its functionality and safety. Additionally, an overall test is conducted to assess the stick as a whole. These tests are crucial in determining the hot stick's ability to handle high-voltage situations effectively.Rate this question:
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- 49.
How long is the 100-kV voltage applied to a hot stick?
- A.
1 Minute
- B.
2 Minute
- C.
3 Minute
- D.
4 Minute
Correct Answer
A. 1 MinuteExplanation
The 100-kV voltage is applied to a hot stick for 1 minute.Rate this question:
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- 50.
At the job site, the aerial lift device should be positioned so the work area is always
- A.
Directly over the truck
- B.
Within reach of the boom
- C.
In front of the truck
- D.
To the right side of the operator
Correct Answer
B. Within reach of the boomExplanation
The aerial lift device should be positioned within reach of the boom in order to ensure that the work area can be easily accessed and worked on. This positioning allows the operator to extend and retract the boom as needed, without having to reposition the entire device. It also ensures that the operator can safely and efficiently perform tasks in the work area, without any obstructions or limitations. Placing the work area directly over the truck, in front of the truck, or to the right side of the operator may not provide the same level of accessibility and flexibility as positioning it within reach of the boom.Rate this question:
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Mar 21, 2023Quiz Edited by
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Jan 20, 2009Quiz Created by
Thor_11
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