3e0x1 EOC Set 2 Electrical Systems Apprentice
Set 1-4 of 2nd set for EOC Test
Questions and Answers
- 1.
The preferred Air Force base distribution system is
- A.
3-phase, 4-wire
- B.
Single-phase, 3-wire
Correct Answer
A. 3-phase, 4-wireExplanation
The preferred Air Force base distribution system is 3-phase, 4-wire. This system is commonly used in industrial and commercial applications as it provides a balanced distribution of power and allows for higher power transfer compared to single-phase systems. The 3-phase, 4-wire system consists of three live wires and one neutral wire, which ensures efficient and reliable power transmission. Additionally, this system allows for the use of 3-phase motors, which are more powerful and efficient compared to single-phase motors.Rate this question:
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- 2.
A substation with one incoming transmission circuit and three outoging distribution circuits has (at least) how many lighting arresters?
- A.
12
- B.
4
Correct Answer
A. 12Explanation
In a substation with one incoming transmission circuit and three outgoing distribution circuits, each circuit requires a lighting arrester for protection against lightning strikes. Therefore, since there are four circuits in total, the substation needs at least four lighting arresters.Rate this question:
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- 3.
Which item supplies control voltage to operate circuit Breakers?
- A.
Current Transformers
- B.
Batteries
Correct Answer
B. BatteriesExplanation
Batteries are used to supply control voltage to operate circuit breakers. They provide a stable and continuous source of electrical energy, ensuring that the circuit breakers can function properly. Current transformers, on the other hand, are used to measure current levels in a circuit and are not directly involved in supplying control voltage to circuit breakers.Rate this question:
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- 4.
What is the configuration of an induction-voltage regulator's primary and secondary windings?
- A.
The primary is in series and the secondary is in shunt
- B.
The primary is in shunt and the secondary is in series
Correct Answer
B. The primary is in shunt and the secondary is in seriesExplanation
In an induction-voltage regulator, the primary winding is connected in shunt, which means it is connected in parallel with the load. On the other hand, the secondary winding is connected in series, which means it is connected in line with the load. This configuration allows for the regulation of voltage by varying the amount of magnetic flux passing through the secondary winding, thereby controlling the output voltage.Rate this question:
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- 5.
In regards to the circuit, how are a step-voltage regulators's primary and secondary windings configured?
- A.
Primary is in series and the secondary is in series
- B.
Primary is in parallel and the secondary is in series
Correct Answer
B. Primary is in parallel and the secondary is in seriesExplanation
In a step-voltage regulator, the primary winding is configured in parallel, while the secondary winding is configured in series. This means that the primary winding is connected to the input voltage source in parallel, allowing it to draw current directly from the source. On the other hand, the secondary winding is connected in series with the load, which allows it to regulate the output voltage by adjusting the turns ratio between the primary and secondary windings. This configuration enables the step-voltage regulator to provide a regulated output voltage that is different from the input voltage.Rate this question:
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- 6.
When can the secondary of a current transformer be opened?
- A.
When the secondary is deenergized
- B.
When the primary is deenergized
Correct Answer
B. When the primary is deenergizedExplanation
The secondary of a current transformer can be opened when the primary is deenergized. This is because the primary current flowing through the transformer creates a proportional current in the secondary winding. Opening the secondary circuit while the primary is still energized can result in a dangerous high voltage being induced in the secondary winding. Therefore, it is necessary to deenergize the primary before opening the secondary circuit to ensure safety.Rate this question:
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- 7.
Which is not a major fuunction of an oil circuit breaker?
- A.
To minimize damage to a system by opening the circuit when an overload occurs
- B.
To stabalize current flow during an overload situation
Correct Answer
B. To stabalize current flow during an overload situationExplanation
The correct answer is "To stabilize current flow during an overload situation." This is not a major function of an oil circuit breaker. Oil circuit breakers are primarily designed to minimize damage to a system by opening the circuit when an overload occurs. They use oil as a medium to extinguish the arc that forms when the circuit is interrupted. Stabilizing current flow during an overload situation is typically achieved through other means, such as using protective relays or current limiters.Rate this question:
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- 8.
What oil circuit breaker components supply amperage to the protective relays?
- A.
Current transformers
- B.
Terminal bushings
Correct Answer
A. Current transformersExplanation
Current transformers supply amperage to the protective relays. These transformers are designed to step down the high current flowing through the circuit breaker to a lower value that can be measured by the protective relays. By providing a proportional current output, the current transformers enable the relays to accurately monitor and detect any abnormal or fault conditions in the circuit. This information is crucial for the relays to initiate appropriate protective actions, such as tripping the circuit breaker, to prevent further damage or hazards.Rate this question:
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- 9.
What percent of electrical system faults are temporary?
- A.
95 percent
- B.
25 percent
Correct Answer
A. 95 percentExplanation
The correct answer is 95 percent. This means that out of all the faults in an electrical system, 95 percent of them are temporary. This indicates that a majority of the faults are not permanent and can be resolved or fixed. It also suggests that only a small percentage of faults are long-lasting or require extensive repairs.Rate this question:
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- 10.
Of these devices, which does not interrupt a fault current?
- A.
Oil circuit breaker
- B.
Sectionalizer
Correct Answer
B. SectionalizerExplanation
A sectionalizer is a device used in electrical power distribution systems to detect and isolate faults in specific sections of the network. It is designed to automatically open and close circuits to isolate the faulted section while allowing uninterrupted power flow to the rest of the system. Therefore, a sectionalizer does not interrupt a fault current but rather helps in localizing and isolating the fault. On the other hand, an oil circuit breaker is a protective device that interrupts fault currents by opening the circuit and extinguishing the arc using oil as an insulating medium.Rate this question:
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- 11.
Air-break switches can be used to break a circuit "under load" if they have
- A.
Vacuum switches
- B.
Arc horns
Correct Answer
B. Arc hornsExplanation
Arc horns are necessary for air-break switches to break a circuit "under load". Arc horns are designed to create a longer path for the arc to travel, allowing it to cool and extinguish more effectively. This prevents damage to the switch and ensures safe disconnection of the circuit while it is still carrying current. Vacuum switches, on the other hand, are used in vacuum circuit breakers, which operate differently from air-break switches.Rate this question:
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- 12.
Why is the arc extinguisheed so quickly in a vacuum recloser?
- A.
The oil absorbs the fault current
- B.
There is very little oxygen to burn
Correct Answer
B. There is very little oxygen to burnExplanation
In a vacuum recloser, the arc extinguishes quickly because there is very little oxygen to burn. In a vacuum environment, the absence of oxygen prevents the sustained combustion of the arc, leading to its rapid extinction. Without oxygen, the arc is unable to sustain itself and is extinguished more efficiently compared to other environments where oxygen is present.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.
6 1/2 times
- B.
2 1/2 times
Correct Answer
B. 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 much better insulator compared to dry air, providing a higher level of insulation and preventing the flow of electricity more effectively.Rate this question:
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- 14.
A high-voltage switch is connected to the distribution system that is to protect in
- A.
Series
- B.
Parallel
Correct Answer
A. SeriesExplanation
In a series connection, the high-voltage switch is connected in line with the distribution system. This means that the current flowing through the switch is the same as the current flowing through the distribution system. If there is a fault or overload in the distribution system, the switch will be able to detect it and interrupt the flow of current to protect the system. This is because in a series connection, the same current flows through all components, allowing the switch to effectively monitor and control the current flow.Rate this question:
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- 15.
What is usually installed with an oil circuit breaker to allow for equipment maintenence, letting you keep the circuit in operation?
- A.
Fused cutouts and a backup oil circuit recloser
- B.
Knife blades and a normally open air-break switch
Correct Answer
B. 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 allow for the isolation of the circuit breaker from the rest of the system, ensuring safety during maintenance. The normally open air-break switch provides an alternative path for the current to flow, bypassing the circuit breaker and allowing uninterrupted power supply to the connected equipment. This setup enables maintenance activities without interrupting the power flow in the circuit.Rate this question:
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- 16.
Oil breaker contacts that are discolore by excessive heat should be
- A.
Adjusted
- B.
Replaced
Correct Answer
B. ReplacedExplanation
Oil breaker contacts that are discolored by excessive heat should be replaced. When contacts in an oil breaker become discolored due to excessive heat, it indicates that they have been damaged and are no longer functioning properly. Adjusting the contacts would not solve the issue as the damage has already occurred. Therefore, the correct course of action is to replace the contacts to ensure the breaker operates safely and effectively.Rate this question:
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- 17.
Dielectrically check the oil in oil circuit breakers
- A.
Monthly
- B.
Every 6 months
Correct Answer
B. Every 6 monthsExplanation
The dielectric strength of the oil in oil circuit breakers needs to be checked regularly to ensure its effectiveness in insulating and extinguishing electrical arcs. Dielectric strength refers to the ability of the oil to withstand high voltage without breaking down. Checking the oil every 6 months allows for timely detection of any degradation or contamination that may reduce its dielectric strength, ensuring the proper functioning of the circuit breakers and preventing electrical hazards. Monthly checks may be too frequent and not necessary unless there are specific concerns or operational issues.Rate this question:
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- 18.
Which of theses acids mixed with water is an effective solution for cleaning insulators and bushings?
- A.
Sulfuric
- B.
Muriatic
Correct Answer
B. MuriaticExplanation
Muriatic acid, also known as hydrochloric acid, is an effective solution for cleaning insulators and bushings when mixed with water. It is a strong acid that can dissolve dirt, grime, and other contaminants on the surfaces of insulators and bushings. This acid-water mixture helps to remove any buildup or residue that may be affecting the performance of the insulators and bushings, allowing for better electrical conductivity and overall efficiency. Sulfuric acid, on the other hand, is not as commonly used for this purpose and may not be as effective in cleaning insulators and bushings.Rate this question:
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- 19.
What do you use to clean the arc interrupters of an air-break switch?
- A.
Cloth or light sanding
- B.
Lint free cloth or round file
Correct Answer
A. Cloth or light sandingExplanation
To clean the arc interrupters of an air-break switch, you can use either a cloth or light sanding. This is because both methods are effective in removing dirt, debris, or any other contaminants that may be present on the arc interrupters. A cloth can be used to wipe away surface dirt, while light sanding can help to remove any stubborn residue or corrosion. It is important to use a gentle touch when sanding to avoid damaging the arc interrupters. Using either of these methods will ensure that the arc interrupters are clean and functioning properly.Rate this question:
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- 20.
Clean a modern air switch that has been closed for a long time by
- A.
Using a clean cloth and wire brush
- B.
Opening and Closing the switch several times
Correct Answer
B. Opening and Closing the switch several timesExplanation
Opening and closing the switch several times can help to loosen any dirt or debris that may have accumulated over time. This action can also help to restore the smooth functioning of the switch by removing any corrosion or rust that may have developed. Additionally, it can help to ensure that the internal components of the switch are properly aligned and functioning correctly. Using a clean cloth and wire brush can be helpful for physically removing any stubborn dirt or grime that may be present on the switch's surface.Rate this question:
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- 21.
Battery bank maintenence is normally done
- A.
Every 6 months
- B.
Monthly
Correct Answer
B. MonthlyExplanation
Battery bank maintenance is typically done on a monthly basis. This frequency allows for regular checks and necessary actions to ensure the optimal performance and longevity of the batteries. Monthly maintenance allows for timely detection and resolution of any issues or potential problems, such as checking battery levels, cleaning terminals, and inspecting for any signs of damage or corrosion. Regular maintenance helps to prevent unexpected failures and ensures that the battery bank operates efficiently and reliably.Rate this question:
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- 22.
What do we use to test a battery cell for its specific gravity?
- A.
Hydrometer syringe
- B.
Barometric gauge
Correct Answer
A. Hydrometer syringeExplanation
A hydrometer syringe is used to test a battery cell for its specific gravity. A hydrometer is a device that measures the density or specific gravity of a liquid. In the case of a battery cell, the specific gravity of the electrolyte solution can indicate the state of charge or health of the battery. By using a hydrometer syringe, the user can draw a sample of the electrolyte and measure its specific gravity to determine the battery's condition.Rate this question:
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- 23.
What must you do if you add water to a battery in freezing temperatures?
- A.
Mix the solution with a stainless steel rod
- B.
Charge the battery
Correct Answer
B. Charge the batteryExplanation
Adding water to a battery in freezing temperatures can cause the water to freeze and expand, which can damage the battery. Charging the battery helps to warm it up and prevent freezing, ensuring that the battery remains in good working condition.Rate this question:
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- 24.
The dielectric test voltage for a realy that is rated at 600 volts is
- A.
1,500 volts
- B.
2,200 volts
Correct Answer
B. 2,200 voltsExplanation
The dielectric test voltage for a relay that is rated at 600 volts is 2,200 volts. This test voltage is higher than the rated voltage of the relay in order to ensure the relay can withstand higher voltage surges or spikes without breaking down. By subjecting the relay to a higher voltage during the test, any potential weaknesses or insulation failures can be identified before the relay is put into operation. Therefore, a dielectric test voltage of 2,200 volts is necessary to ensure the reliability and safety of the relay.Rate this question:
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- 25.
After a wiring change to a control device, check substaion circuits for
- A.
Tightness of connections
- B.
Proper operation
Correct Answer
B. Proper operationExplanation
After a wiring change to a control device, it is important to check the substation circuits for proper operation. This is necessary to ensure that the wiring change has been implemented correctly and that the control device is functioning as intended. Checking for proper operation involves testing the circuits to ensure that they are functioning as expected and that there are no issues or malfunctions. This step is crucial in order to maintain the efficiency and reliability of the substation circuits.Rate this question:
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- 26.
Switchboard grapgic instruments and revenue watt-hour meters must be calibrated every
- A.
Year
- B.
4 years
Correct Answer
B. 4 yearsExplanation
Switchboard graphic instruments and revenue watt-hour meters must be calibrated every 4 years. Calibration is the process of adjusting and verifying the accuracy of measuring instruments. It ensures that the instruments provide reliable and accurate measurements. Calibrating these instruments every 4 years helps to maintain their accuracy and ensure that they continue to provide precise measurements over time. Regular calibration is important to ensure the proper functioning of these instruments and to meet quality control standards.Rate this question:
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- 27.
Which device is essentially a voltage regulator and requires similar servicing?
- A.
Overcurrent relay
- B.
Distribution transformer
Correct Answer
B. Distribution transformerExplanation
A distribution transformer is essentially a voltage regulator as it is responsible for stepping down the high voltage from the power grid to a lower voltage suitable for distribution to households and businesses. It ensures a stable and consistent voltage supply to the consumers. Like a voltage regulator, a distribution transformer also requires similar servicing to maintain its efficiency and functionality over time. This may include regular inspections, maintenance, and occasional repairs or replacements of components to ensure proper voltage regulation and prevent any potential issues or failures.Rate this question:
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- 28.
What is the first step in isolating a voltage regulator
- A.
Test for voltage
- B.
Place regulator in the neutral or zero position
Correct Answer
B. 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 ensures that there is no voltage flowing through the regulator, which is necessary for safely working on it. By placing the regulator in the neutral or zero position, any potential electrical hazards can be avoided, allowing for a safer and more effective isolation process.Rate this question:
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- 29.
For each degree below 77 degrees F, battery capacity is reduced by what percent
- A.
0.6
- B.
0.8
Correct Answer
B. 0.8Explanation
For each degree below 77 degrees F, the battery capacity is reduced by 0.8 percent.Rate this question:
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- 30.
What must you do after repair work on a relay?
- A.
Make a complete performance test
- B.
Match the tap block setting with other relays
Correct Answer
A. Make a complete performance testExplanation
After repair work on a relay, it is necessary to conduct a complete performance test. This is important to ensure that the relay is functioning properly and is able to perform its intended tasks effectively. By conducting a performance test, any potential issues or malfunctions can be identified and addressed, ensuring the reliability and efficiency of the relay. Matching the tap block setting with other relays may be important in certain cases, but it is not specifically mentioned in the question and therefore not the correct answer.Rate this question:
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- 31.
Which meter do you use in a transformer continuity check
- A.
Ohmmeter
- B.
Megger
Correct Answer
B. MeggerExplanation
A Megger is used in a transformer continuity check because it is specifically designed to measure high resistance values, which is necessary for testing the insulation resistance of transformers. This instrument applies a high voltage to the transformer and measures the current flowing through the insulation. By comparing the measured resistance to the specified values, it can determine if there are any faults or leaks in the transformer's insulation. An ohmmeter, on the other hand, is not suitable for this type of test as it typically measures low resistance values and cannot provide the high voltage required for insulation testing.Rate this question:
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- 32.
If a continuity check between the primary and secondary transformer windings shows a zero reading, the transformer is probably
- A.
Grounded
- B.
Shorted
Correct Answer
B. ShortedExplanation
If a continuity check between the primary and secondary transformer windings shows a zero reading, it indicates a short circuit in the transformer. A short circuit occurs when there is an unintended low-resistance connection between two points in an electrical circuit, causing excessive current flow. In this case, the zero reading suggests that there is a direct connection between the primary and secondary windings, which is not supposed to happen in a properly functioning transformer. Therefore, the transformer is most likely shorted.Rate this question:
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- 33.
What publication outlines how to perform a flash hazard analysis to determine PPE requirement
- A.
NFPA 72
- B.
NFPA 70 E
Correct Answer
B. NFPA 70 EExplanation
NFPA 70 E is the correct answer because it is the publication that outlines how to perform a flash hazard analysis to determine the personal protective equipment (PPE) requirement. NFPA 70 E specifically focuses on electrical safety in the workplace and provides guidelines for assessing and addressing electrical hazards, including flash hazards. It provides detailed information on how to conduct a flash hazard analysis, which involves evaluating the potential for a flash fire or explosion due to electrical faults, and determining the appropriate PPE to protect workers from these hazards.Rate this question:
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- 34.
Hard hats must meet ANSI289.1 Class E requirements 20,000V ac test for how many minutes
- A.
5
- B.
3
Correct Answer
B. 3Explanation
The correct answer is 3. Hard hats must meet ANSI289.1 Class E requirements for a 20,000V ac test for 3 minutes. This means that during the test, the hard hat must be able to withstand exposure to 20,000 volts of alternating current for a duration of 3 minutes without any electrical conductivity or breakdown. This ensures that the hard hat provides adequate protection against electrical hazards in the workplace.Rate this question:
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- 35.
Proper wear of arcflash resistant clothing includes
- A.
Coveralls worn with the sleeves rolled down
- B.
Coveralls worn with the sleeves rolled up
Correct Answer
A. Coveralls worn with the sleeves rolled downExplanation
Proper wear of arcflash resistant clothing includes coveralls worn with the sleeves rolled down. This is because rolling down the sleeves provides maximum protection by ensuring that the entire arm is covered and shielded from potential arcflash hazards. Rolling up the sleeves exposes the arms and increases the risk of injury in case of an arcflash event. Therefore, it is important to follow the recommended guidelines and keep the sleeves rolled down to maintain safety and minimize the chances of harm.Rate this question:
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- 36.
How often should the supervisor inspect bodybelts and safety straps?
- A.
Before each use
- B.
Every 6 months
Correct Answer
B. Every 6 monthsExplanation
The supervisor should inspect bodybelts and safety straps every 6 months. This regular inspection ensures that the equipment is in good working condition and can effectively protect workers from falls or accidents. By conducting inspections every 6 months, any wear and tear or damage can be identified and addressed promptly, reducing the risk of accidents or injuries. Regular inspections also help to maintain compliance with safety regulations and standards.Rate this question:
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- 37.
Which of these is not a way to tell whether gaffs are sharpened properly
- A.
Plane test
- B.
Slope test
Correct Answer
B. Slope testExplanation
The slope test is not a way to determine if gaffs are sharpened properly. The plane test, on the other hand, involves running the gaffs along a flat surface to check if they glide smoothly. This helps to ensure that the edges are sharp and well-maintained. The slope test, however, is not a recognized method for assessing the sharpness of gaffs.Rate this question:
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- 38.
Which of these is used for a bending test on a body belt or safety strap
- A.
Lineman's wrench
- B.
3/4-inch mandrel
Correct Answer
B. 3/4-inch mandrelExplanation
A 3/4-inch mandrel is used for a bending test on a body belt or safety strap. This tool is specifically designed to measure the flexibility and durability of these safety equipment. By applying pressure and bending the body belt or safety strap around the 3/4-inch mandrel, it can determine if the equipment can withstand the necessary stress and strain during use. The mandrel's size is standardized to ensure consistency in testing and compliance with safety regulations.Rate this question:
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- 39.
Which part of the gaff do you sharpen
- A.
Flat inner side
- B.
Top ridge
Correct Answer
A. Flat inner sideExplanation
The correct answer is the flat inner side. The gaff is a pole or hook used for various purposes, such as catching fish or climbing. Sharpening the flat inner side of the gaff would make it more effective and efficient in its intended use. By sharpening this part, it would be easier to pierce and hold onto objects, ensuring a secure grip. Sharpening the top ridge, on the other hand, may not provide the same benefits as it is not the part of the gaff that comes into direct contact with the target object.Rate this question:
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- 40.
What is the required rythhm when climbing a utility pole
- A.
Right arm rises as left foot rises
- B.
Left arm rises as left foot rises
Correct Answer
B. Left arm rises as left foot risesExplanation
When climbing a utility pole, the required rhythm is for the left arm to rise as the left foot rises. This means that the left arm and left foot move together in sync while climbing. This rhythm helps maintain balance and stability while ascending the pole. By coordinating the movement of the left arm and left foot, the climber can ensure a steady and controlled ascent, reducing the risk of accidents or falls.Rate this question:
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- 41.
What is the OSHA standered for retraining of climbing tasks performed less than once per year
- A.
Biannually
- B.
Annually
Correct Answer
B. AnnuallyExplanation
The correct answer is Annually. According to OSHA standards, employees who perform climbing tasks less than once per year should receive retraining on an annual basis. This ensures that they stay up to date with the necessary safety procedures and guidelines associated with climbing tasks. Regular retraining helps to minimize the risk of accidents and injuries, as employees are reminded of the proper techniques and precautions to follow when performing such tasks.Rate this question:
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- 42.
Leather protectors or gauntlets should be
- A.
2 to 5 inches shorter than the rubber gloves
- B.
Same length as the rubber gloves
Correct Answer
A. 2 to 5 inches shorter than the rubber glovesExplanation
Leather protectors or gauntlets should be 2 to 5 inches shorter than the rubber gloves to ensure proper protection. By being shorter, the leather protectors or gauntlets will not interfere with the dexterity and flexibility of the rubber gloves, allowing the wearer to perform tasks efficiently and comfortably. Additionally, the shorter length prevents the leather protectors or gauntlets from becoming a potential hazard by getting caught on objects or machinery. This ensures the safety of the wearer while maintaining the necessary level of protection.Rate this question:
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- 43.
For full protection up to the shoulder, rubber sleeves are
- A.
Worn tucked into rubber gloves
- B.
Worn on the outside of Rubber gloves
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 wearing the sleeves inside the gloves, it ensures that there are no gaps or exposed areas between the gloves and sleeves, minimizing the risk of any hazardous substances or materials coming into contact with the skin. This method creates a sealed barrier, providing maximum protection for the wearer.Rate this question:
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- 44.
Which of these combintaions are you likely to use inside rubber gloves?
- A.
Cotton gloves and hand cream
- B.
Cotton gloves and dusting powder
Correct Answer
B. Cotton gloves and dusting powderExplanation
The likely combination to use inside rubber gloves is cotton gloves and dusting powder. Cotton gloves can provide a comfortable and soft lining inside the rubber gloves, while the dusting powder helps to absorb moisture and prevent sweating. This combination can enhance the overall comfort and effectiveness of wearing rubber gloves for extended periods of time.Rate this question:
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- 45.
How often are rubber gloves given an electrical test
- A.
Once a month
- B.
6 months
Correct Answer
B. 6 monthsExplanation
Rubber gloves are given an electrical test every 6 months. This frequency is determined by safety regulations and standards to ensure the effectiveness and reliability of the gloves in protecting against electrical hazards. Regular testing helps to identify any potential defects or damage that may have occurred over time, allowing for timely replacement or repair of the gloves. This periodic testing interval strikes a balance between ensuring safety and minimizing unnecessary downtime or costs associated with more frequent testing.Rate this question:
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- 46.
The supervisor must inspect rubber blankets visually every
- A.
Year
- B.
6 months
Correct Answer
B. 6 monthsExplanation
Rubber blankets must be inspected visually every 6 months. This is because rubber blankets are used in various industries, such as printing, to insulate and protect equipment. Regular visual inspections are necessary to detect any signs of wear and tear, such as cracks or holes, which could compromise their effectiveness. By inspecting the rubber blankets every 6 months, the supervisor can ensure that they are in good condition and replace them if necessary, thus maintaining the safety and efficiency of the equipment.Rate this question:
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- 47.
How must Rubber blankets be stored?
- A.
Rolled up and taped
- B.
Flat or rolled in Blanket Canister
Correct Answer
B. Flat or rolled in Blanket CanisterExplanation
Rubber blankets must be stored flat or rolled in a blanket canister to maintain their shape and prevent damage. Storing them rolled up and taped can cause the blankets to become misshapen and potentially develop creases or folds that could affect their effectiveness. Storing them flat or in a blanket canister ensures that they remain in good condition and ready for use when needed.Rate this question:
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- 48.
Which of the following manufacter's certification tests is acceptable for hotsticks
- A.
100,000 volts DC per foot for 5 minutes on fiberglass and epoxy sticks
- B.
100,000 volts AC per foot for 5 minutes on fiberglass and epoxy sticks
Correct Answer
B. 100,000 volts AC per foot for 5 minutes on fiberglass and epoxy sticksExplanation
The acceptable 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 and remain functional for a specific duration of time. The use of AC voltage is specified because hotsticks are primarily used for working with alternating current systems.Rate this question:
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- 49.
How often are hot-line tools tested electrically
- A.
Annually
- B.
Every 6 months
Correct Answer
B. Every 6 monthsExplanation
Hot-line tools are specialized electrical tools used for working on live electrical systems. These tools are subject to wear and tear, which can affect their electrical safety and reliability. Therefore, they need to be regularly tested to ensure their electrical integrity. Testing these tools every 6 months is a reasonable frequency as it allows for timely identification of any electrical faults or issues that may have developed. This ensures that the tools remain safe and effective for use in live electrical environments.Rate this question:
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- 50.
Test hot sticks with a
- A.
DC hi-pot test set
- B.
Megger
Correct Answer
A. DC hi-pot test setExplanation
The correct answer is a DC hi-pot test set. This is because hot sticks, which are used to test high voltage lines, need to be tested themselves to ensure their safety and effectiveness. A DC hi-pot test set is specifically designed to test the insulation of high voltage equipment, such as hot sticks, by applying a high voltage DC current to identify any potential faults or weaknesses. Therefore, using a DC hi-pot test set is the appropriate method to test hot sticks.Rate this question:
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