Daddys Quiz Part 3
Part 3 of almost, going to be probably 5 parts. [This is a closed exam ; No coppying is permitted. ]
Questions and Answers
- 1.
When meggering the ground on a tower how many temporary rods must be used
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
B. 2Explanation
When meggering the ground on a tower, two temporary rods must be used. These rods are inserted into the ground at a certain distance apart from each other and connected to the megger. The purpose of using two rods is to create a complete circuit for the current to flow through, allowing accurate measurement of the ground resistance. Using only one rod would not provide an accurate reading as it would not complete the circuit. Similarly, using more than two rods would not be necessary and could potentially introduce errors in the measurement.Rate this question:
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- 2.
How many operations are you allowed on an s&c load buster tool before reconditioning is recommended?
- A.
No limit
- B.
50-76
- C.
100-200
- D.
500-1000
Correct Answer
D. 500-1000Explanation
The correct answer is 500-1000. This suggests that the S&C Load Buster tool can undergo a certain number of operations before it needs to be reconditioned. The range of 500-1000 operations indicates the recommended usage limit before maintenance is required, ensuring optimal performance and safety.Rate this question:
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- 3.
If one phase on a 3 phase, 3 wire delta becomes grounded what happens?
- A.
Nothing
- B.
High circuiting current
- C.
A short circuit
- D.
Lowered voltage
Correct Answer
A. NothingExplanation
If one phase on a 3 phase, 3 wire delta becomes grounded, nothing happens. This is because a grounded phase in a 3 phase system does not cause any significant change or disturbance in the circuit. The other two phases will continue to function normally, and there will be no high circuiting current, short circuit, or lowered voltage as a result of the grounded phase.Rate this question:
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- 4.
Second point of contact means
- A.
Any surface that would allowed your body to complete a circuit to ground
- B.
Side bus on your vechile
- C.
Your supervisor
- D.
SCC
Correct Answer
A. Any surface that would allowed your body to complete a circuit to groundExplanation
The term "second point of contact" refers to any surface that can create a pathway for electric current to flow from your body to the ground. When working with electrical systems, it is important to have a second point of contact to ensure that any potential electrical shock is safely dissipated. This can be achieved by touching a grounded surface or using specific equipment designed for grounding purposes. By having a second point of contact, the risk of electrical accidents or injuries can be minimized.Rate this question:
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- 5.
What is the minimum class of line hose which can be used in a 25 kv line
- A.
Class 1
- B.
Class 2
- C.
Class 4
- D.
Class 3
Correct Answer
D. Class 3Explanation
The minimum class of line hose that can be used in a 25 kv line is class 3.Rate this question:
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- 6.
If you dont know the operating voltage of the line what limit of approach do you observe?
- A.
Line design voltage
- B.
240kv
- C.
1 meter
- D.
4 feet
Correct Answer
A. Line design voltageExplanation
The correct answer is "line design voltage." This is because the question is asking about the limit of approach when the operating voltage of the line is unknown. In such a situation, the safest approach would be to consider the line design voltage, which is the voltage the line was designed to handle. By using the line design voltage as the limit of approach, you ensure that you maintain a safe distance from the line to avoid any potential hazards.Rate this question:
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- 7.
When tension stringing what maximum % of final slag tension can you have on a conductor
- A.
70%
- B.
Whatever it takes to maintain clearances
- C.
100%
- D.
No limit
Correct Answer
A. 70%Explanation
When tension stringing a conductor, it is recommended to have a maximum of 70% of the final sag tension on the conductor. This means that the tension should not exceed 70% of the total tension that the conductor will experience when it is fully loaded. This is important to ensure that the conductor does not experience excessive stress or strain, which could lead to damage or failure. By keeping the tension within this limit, the conductor can maintain its structural integrity and meet the necessary clearance requirements.Rate this question:
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- 8.
How could you monitor your protective grounds on a transmission line
- A.
With an ammeter
- B.
With a maximeter
- C.
With a voltmeter
- D.
With a megger
Correct Answer
A. With an ammeterExplanation
An ammeter is used to measure the flow of electric current in a circuit. By connecting an ammeter in series with the protective grounds on a transmission line, it can monitor the current flowing through the grounds. This allows for the detection of any abnormal or excessive current, which could indicate a fault or malfunction in the protective grounds. Therefore, using an ammeter is an effective way to monitor the protective grounds on a transmission line.Rate this question:
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- 9.
A dangerous condition observed on another utilities system
- A.
Is nothing to worry about
- B.
Should be reported immediatley to your supervisor or the other utility
- C.
None of the above
- D.
Is the utilities problem
Correct Answer
B. Should be reported immediatley to your supervisor or the other utilityExplanation
The correct answer is "should be reported immediately to your supervisor or the other utility." This means that if you observe a dangerous condition on another utilities system, it is important to report it right away to either your supervisor or the relevant utility. This ensures that appropriate action can be taken to address the dangerous condition and prevent any potential harm or damage.Rate this question:
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- 10.
At what angle does a bisect tension equal the line tension
- A.
55 degrees
- B.
45 degrees
- C.
60 degrees
- D.
90 degrees
Correct Answer
C. 60 degreesExplanation
When a line is under tension, the force acting on it is distributed along the line. A bisect tension is a situation where a line is divided into two equal segments, and each segment experiences equal tension. In this scenario, the angle at which the bisect tension equals the line tension is 60 degrees. At this angle, the forces acting on both segments of the line are balanced, resulting in equal tension.Rate this question:
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- 11.
You have broken the parallel between two lines, done the required work, and now have to replace the jumpers to parallel the lines. Why would you use phasing sticks before doing this?
- A.
To get the correct phase rotation
- B.
To check conductor capacity
- C.
To check for switching surges
- D.
To ensure you dont get a big ball of fire
Correct Answer
D. To ensure you dont get a big ball of fireExplanation
Phasing sticks are used to verify the phase rotation of electrical conductors. When replacing jumpers to parallel lines, it is crucial to ensure that the phase rotation is correct. If the phase rotation is incorrect, it can lead to a short circuit or a "big ball of fire" due to the mismatch in electrical phases. Therefore, using phasing sticks before replacing the jumpers helps to prevent dangerous situations and ensure the safe operation of the electrical system.Rate this question:
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- 12.
What do you do with your phasing sticks before using them to phase in a line
- A.
Wipe them down with a damp cloth
- B.
Test to verify operation
- C.
Hi pot them
- D.
Check the test date
Correct Answer
B. Test to verify operationExplanation
Before using phasing sticks to phase in a line, it is important to test them to verify their operation. This ensures that the phasing sticks are functioning correctly and will provide accurate results when used. By testing the sticks, any potential issues or malfunctions can be identified beforehand, preventing any errors or safety hazards during the phasing process.Rate this question:
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- 13.
When you inspect a core sample from a pole you are looking for
- A.
Moisture content
- B.
The number of rigngs to determine the age of the pole
- C.
Pyslium spores
- D.
Visible rot
Correct Answer
D. Visible rotExplanation
When inspecting a core sample from a pole, one would be looking for visible rot. This is because visible rot indicates decay and deterioration in the wood, which can affect the structural integrity of the pole. It is important to identify and assess the extent of visible rot to determine if the pole needs to be repaired or replaced to ensure safety and functionality. Moisture content, the number of rings to determine age, and pyslium spores may also provide useful information, but they are not specifically mentioned in the question.Rate this question:
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- 14.
If you have a fluctuating voltages and recieve shocks from the water taps, you have
- A.
A transformer with additive polarity
- B.
An open neutral
- C.
A poor connection on the ground rod
- D.
Secondary hot and neutral reversed
Correct Answer
B. An open neutralExplanation
If you have fluctuating voltages and receive shocks from the water taps, it indicates that you have an open neutral. An open neutral occurs when the neutral wire in an electrical circuit is disconnected or broken. This results in an imbalance of electrical current and can cause voltage fluctuations and shocks.Rate this question:
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- 15.
Which splice is double the diameter of the rope
- A.
Flemish
- B.
Short splice
- C.
A reverse tuck
- D.
Long splice
Correct Answer
B. Short spliceExplanation
A short splice is a type of rope splice where two rope ends are interwoven together to create a strong and secure connection. In this context, the short splice is the correct answer because it is the only splice mentioned that does not involve folding or tucking the rope, which means it does not double the diameter of the rope. The other splices mentioned - flemish, long splice, and reverse tuck - all involve folding or tucking the rope, which would result in doubling the diameter of the rope.Rate this question:
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- 16.
What colors of ampact shells are used to remove conductors?
- A.
None of the above
- B.
Red blue and yellow
- C.
Red white and blue
- D.
Blue yellow and white
Correct Answer
C. Red white and blueExplanation
The colors of impact shells that are used to remove conductors are red, white, and blue.Rate this question:
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- 17.
When spooling right hand lay cable on to a drum where do you attach it?
- A.
On the right side of the drum
- B.
On the left side of the drum
- C.
To the truck bumper
- D.
It doesnt matter
Correct Answer
A. On the right side of the drumExplanation
When spooling right hand lay cable onto a drum, it is attached on the right side of the drum. This is because the right hand lay cable is designed to be wound in a clockwise direction, and attaching it on the right side ensures that it is spooled correctly. Attaching it on the left side would result in the cable being spooled in the opposite direction, causing potential issues and difficulties during unwinding and installation.Rate this question:
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- 18.
What is the release lever on the web hoist for?
- A.
To release load
- B.
To change gears
- C.
To allow you to pull slack
- D.
To turn the hoist 90 degrees
Correct Answer
C. To allow you to pull slackExplanation
The release lever on the web hoist is used to allow you to pull slack. This means that by activating the release lever, you can loosen the tension on the web hoist, making it easier to pull and adjust the load. This feature is helpful when you need to make adjustments or reposition the load without having to release the entire load from the hoist.Rate this question:
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- 19.
Rubber gloves must be field tested
- A.
Each morning and each afternoon
- B.
Once a day
- C.
After use and before starting
- D.
Before each use
Correct Answer
D. Before each useExplanation
Rubber gloves must be field tested before each use to ensure their effectiveness and safety. This practice is necessary to identify any potential damage or defects that may have occurred during storage or previous use. By conducting these tests regularly, any issues can be detected and addressed promptly, reducing the risk of contamination or injury. Field testing before each use also ensures that the gloves meet the required standards and provide the necessary protection for the user.Rate this question:
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- 20.
When using new polypropelene rope to tag out a conductor on a 25 kv - 3 phase powerline, the correct procedure is to use
- A.
A guy breaker spliced in the rope
- B.
A nylon sling with shackle between phase wire and rop
- C.
None of the above
- D.
A roler - fink stick
Correct Answer
D. A roler - fink stickExplanation
The correct procedure for using new polypropylene rope to tag out a conductor on a 25 kv - 3 phase powerline is to use a roler - fink stick. This tool is specifically designed for safely handling and manipulating powerlines. It helps in securing the rope to the conductor, ensuring proper tagging out procedures are followed to prevent accidents or injuries. Using a guy breaker spliced in the rope or a nylon sling with shackle between phase wire and rope are not the correct procedures in this scenario.Rate this question:
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- 21.
What can be learned from inspection of blown fuses?
- A.
Transformer KVA
- B.
Primary voltage
- C.
Type of fault
- D.
Fuse size
Correct Answer
C. Type of faultExplanation
From inspecting blown fuses, one can learn about the type of fault that occurred. When a fuse blows, it indicates that there was an excessive current flow in the circuit, which could be caused by a short circuit or an overload. By examining the blown fuse, one can determine the characteristics of the fault, such as the magnitude of the current or the duration of the fault, which can help in diagnosing and resolving the issue.Rate this question:
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- 22.
[Finish the sentence with an answer below] Drip loops at the service entrance
- A.
Are for appearance only
- B.
Prevent capillary action
- C.
Prevents stains in the weather head
- D.
Prevent corrosion at the connections
Correct Answer
B. Prevent capillary actionExplanation
Drip loops at the service entrance prevent capillary action. Capillary action is the ability of a liquid to flow in narrow spaces, against the force of gravity. By creating a loop in the electrical wires, any water or moisture that may enter the service entrance will be stopped at the lowest point of the loop, preventing it from traveling further along the wires. This helps to protect the electrical system from potential damage caused by water infiltration.Rate this question:
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- 23.
Extra holes in the concrete poles
- A.
Require bands to be installed for equipments
- B.
Cannot be drilled in the field
- C.
Cannot be drilled at all
- D.
Can be drilled in the field
Correct Answer(s)
B. Cannot be drilled in the field
D. Can be drilled in the fieldExplanation
The given answer is contradictory and does not provide a clear explanation. It states that extra holes in the concrete poles cannot be drilled in the field and can be drilled in the field simultaneously. This answer is not logical and does not provide a clear explanation for the question.Rate this question:
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- 24.
A customer half his lights out, what do you look for?
- A.
Blown primary fuse
- B.
Open hot leg
- C.
Costumer ground disconnected
- D.
Open neutral
Correct Answer(s)
B. Open hot leg
C. Costumer ground disconnectedExplanation
In this scenario, if a customer has half of their lights out, it suggests that there may be an issue with the electrical supply. The correct answer, "open hot leg" refers to a situation where one of the hot wires in the electrical circuit is not functioning properly, causing a loss of power to certain lights. Additionally, the answer "customer ground disconnected" implies that the grounding connection may be faulty or disconnected, which can also lead to a loss of power. These two possibilities align with the given situation and provide a likely explanation for the customer's problem.Rate this question:
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- 25.
To create an ideal anchoring situation, the head of the anchor rod shoul;d be the same distance away from the deadend structure as
- A.
The distance from the anchor plate to the secondary guy attatchment
- B.
The height from the ground level to the guy attatchment on the structure
- C.
The distance form the anchor plate to the guy attatchment
- D.
The height from the neutral wire to the guy attatchment on the structure
Correct Answer
B. The height from the ground level to the guy attatchment on the structureExplanation
To create an ideal anchoring situation, the head of the anchor rod should be the same distance away from the deadend structure as the height from the ground level to the guy attachment on the structure. This ensures that the anchor rod is properly aligned with the guy attachment, providing stability and support to the structure. By maintaining the same distance, it helps distribute the load evenly and prevents any unnecessary stress or strain on the anchor rod and the structure.Rate this question:
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- 26.
What is the purpose of a conservator tank used on large power transformers.
- A.
To permit the movement of air into windings for cooling
- B.
To allow expansion of oil due to heat cycling
- C.
To store water for cooling
- D.
To clean transformer oil
Correct Answer
B. To allow expansion of oil due to heat cyclingExplanation
The purpose of a conservator tank used on large power transformers is to allow expansion of oil due to heat cycling. Transformers generate heat during operation, causing the oil inside them to expand. The conservator tank provides a space for the expanded oil to move into, preventing excessive pressure buildup within the transformer. This helps to maintain the proper functioning and longevity of the transformer.Rate this question:
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- 27.
Where should vehicles be parked when working on an outside phase of a single circuit tower if all land around the accessible
- A.
Off the right of way on the side being worked on
- B.
Under the center phase or under the outside phase not being worked on
- C.
In line with the phase being worked on
- D.
Off of the right of way on the opposite side of the hase being worked on
Correct Answer
B. Under the center phase or under the outside phase not being worked onExplanation
Vehicles should be parked under the center phase or under the outside phase not being worked on.Rate this question:
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- 28.
You are adding a transformer into a 120/240 volt system one span away from an existing transformer, how would you ensure you connected it properly.
- A.
Use a phase rotation meter
- B.
Connect neutral and then use a voltmeter to check betweem the transformer hot legs and the existing system, if reading are 0, then then connect.
- C.
Connect neutral and two hotlegs and energize
- D.
Connect neutral and then use a voltmeter to check between the transformer hot legs and the existing system, if reading is 240 then connect.
Correct Answer
B. Connect neutral and then use a voltmeter to check betweem the transformer hot legs and the existing system, if reading are 0, then then connect.Explanation
To ensure proper connection of the transformer into the 120/240 volt system, the correct approach is to first connect the neutral and then use a voltmeter to check between the transformer hot legs and the existing system. If the readings on the voltmeter are 0, it indicates that the connection is correct and can be made. This method ensures that there is no potential voltage difference between the transformer and the existing system, minimizing the risk of electrical issues or damage.Rate this question:
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- 29.
Radio and tv interferance may be cause by
- A.
Loose hardware
- B.
CCA treatment on poles
- C.
Untreated poles
- D.
Insuficient ground clearance
Correct Answer
A. Loose hardwareExplanation
Loose hardware can cause radio and TV interference because when the hardware is not securely fastened, it can create vibrations and movement. These movements can generate electrical noise that can disrupt the signals received by radios and TVs. This interference can result in poor reception, distorted audio or video, and overall signal degradation. Therefore, loose hardware should be tightened or replaced to ensure a stable and interference-free connection.Rate this question:
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- 30.
From practical work on energized conductors or equipemtn should be done from
- A.
From a comfortable position above the conductor
- B.
A diving board
- C.
Below the conductor
- D.
Beside the conductor
Correct Answer
C. Below the conductorExplanation
When working on energized conductors or equipment, it is safer to be positioned below the conductor. This positioning allows for better visibility and control of the work being performed. Being below the conductor also reduces the risk of electrical hazards, such as accidental contact with live wires or equipment. Additionally, working from below allows for easier access to tools and equipment, making the task more efficient and effective.Rate this question:
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- 31.
Sagging the conductor too tight may cuase
- A.
Excessive line losses due to increased skin effect
- B.
Higher line resistance
- C.
An inverteed centenary curve
- D.
Excessive vibration leading to conductor strands breaking
Correct Answer
D. Excessive vibration leading to conductor strands breakingExplanation
Sagging the conductor too tight can cause excessive vibration, which in turn can lead to the breaking of conductor strands. This is because when the conductor is pulled too tightly, it becomes more prone to vibrations caused by wind or other external factors. These vibrations can cause stress on the conductor, leading to the breaking of individual strands.Rate this question:
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- 32.
In the ground lead on a lightning arrester is hanging down and no longer connected to the arrester this indicates
- A.
It was a faulty arrester
- B.
There has been a ground fault on the line
- C.
It has experienced a hit by lightning
- D.
An apprentice made the connection
Correct Answer
C. It has experienced a hit by lightningExplanation
The correct answer is "it has experienced a hit by lightning." When the ground lead on a lightning arrester is hanging down and no longer connected to the arrester, it suggests that the arrester has been hit by lightning. The force of the lightning strike may have caused the ground lead to disconnect from the arrester. This indicates that the arrester has experienced a direct hit from a lightning strike.Rate this question:
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- 33.
In order to assure that there is no difference in potential between the ground under an airbreak and the handle
- A.
The rectangular gradient control mat must be installed in the ground uner the handle and connected to the handle
- B.
The operator must operate the handle in one fast smooth motion
- C.
The operator must wear rubber gloves
- D.
The airbreaker must be operated remotely
Correct Answer
A. The rectangular gradient control mat must be installed in the ground uner the handle and connected to the handleExplanation
To ensure that there is no difference in potential between the ground under an airbreak and the handle, the rectangular gradient control mat needs to be installed in the ground under the handle and connected to the handle. This helps to create an equipotential zone, where the potential difference is eliminated, ensuring safety for the operator. By connecting the control mat to the handle, any potential difference between the ground and the handle is equalized, reducing the risk of electric shock.Rate this question:
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- 34.
Hardware closer than __________ together, must be bonded
- A.
8" or 200 mm
- B.
10" or 250mm
- C.
4" or 100mm
- D.
1" or 50mm
Correct Answer
C. 4" or 100mmExplanation
Hardware closer than 4" or 100mm together must be bonded. This means that any hardware, such as screws or bolts, that are placed within a distance of 4" or 100mm from each other need to be securely fastened or connected. This bonding ensures that the hardware remains stable and prevents any potential movement or separation, which could compromise the integrity or functionality of the structure or equipment being assembled.Rate this question:
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- 35.
What is the minimum bending radius an underground cable can be bent in relationship to its diameter
- A.
2 x the conductor diameter
- B.
25 x the conductor diameter
- C.
35 x the conductor diameter
- D.
12 x the conductor diameter
Correct Answer
D. 12 x the conductor diameterExplanation
The minimum bending radius of an underground cable is typically 12 times the conductor diameter. This means that the cable should not be bent in a radius smaller than 12 times its diameter to prevent damage to the cable and ensure proper functionality.Rate this question:
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- 36.
An in service underground transformer has one exposed hot insert, what would you cover it with
- A.
An insulating cap
- B.
A grounding cap
- C.
A fedthrough brushing
- D.
A shipping cap
Correct Answer
A. An insulating capExplanation
In order to ensure safety, an exposed hot insert in a transformer should be covered with an insulating cap. This cap will provide insulation and prevent any accidental contact with the hot insert, reducing the risk of electric shock or other electrical hazards. It acts as a protective barrier, effectively isolating the hot insert from any external contact.Rate this question:
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- 37.
The difference between a live front and a dead front transformer is that in a live front :
- A.
The buss work is internal
- B.
The cables are terminated with stress cones
- C.
You can come into contact with the brushing
- D.
You can switch with rubber gloves
Correct Answer
B. The cables are terminated with stress conesExplanation
In a live front transformer, the cables are terminated with stress cones. This means that the cables are connected to the transformer using stress cones, which are designed to distribute the electrical stress evenly and prevent any breakdown or damage to the cables. This ensures a safe and reliable connection between the cables and the transformer.Rate this question:
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- 38.
The first thing you do before removing a manhole cover is
- A.
Hold a tailboard
- B.
Set up a tripod
- C.
Erect barrier
- D.
Test for gases
Correct Answer
C. Erect barrierExplanation
Before removing a manhole cover, it is important to erect a barrier. This is necessary to ensure the safety of both the person removing the cover and others in the vicinity. Erecting a barrier helps to prevent accidental falls into the open manhole, which can result in serious injuries or even fatalities. It also serves as a visual warning for others, alerting them to the potential danger and preventing them from accidentally stepping into the open manhole. By erecting a barrier, the necessary precautions are taken to minimize the risks associated with working around manholes.Rate this question:
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- 39.
The smicon (semi conductor) on an underground cable is
- A.
Porous
- B.
An insulator
- C.
Made from germanium
- D.
A conductor
Correct Answer
D. A conductorExplanation
The correct answer is "a conductor." This means that the smicon (semi conductor) on an underground cable is a material that allows the flow of electric current. Conductors have low resistance to the flow of electricity and are commonly used in electrical systems to transmit power.Rate this question:
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- 40.
The first thing you would do when installing high voltage cable across communication cable is
- A.
Expose the communication cable by hand
- B.
Put the power cable underneath
- C.
Power dig to within 6" of the cable
- D.
Install it over top of the communication cable
Correct Answer
A. Expose the communication cable by handExplanation
The correct answer is to expose the communication cable by hand. This means that before installing the high voltage cable, the communication cable needs to be uncovered manually. This step is necessary to ensure that the communication cable is not damaged during the installation process. Once the communication cable is exposed, the installation of the high voltage cable can proceed.Rate this question:
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- 41.
What is the interupting rating of a 25kv loadbreak elbow
- A.
100A
- B.
200A
- C.
50A
- D.
25A
Correct Answer
B. 200AExplanation
The interrupting rating of a loadbreak elbow refers to the maximum current that the elbow can safely interrupt without causing damage. In this case, the correct answer is 200A, which means that the 25kv loadbreak elbow can safely interrupt up to 200 amps of current.Rate this question:
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- 42.
Why would you put a parking brushing on a transformer
- A.
To parallel it with another phase
- B.
To isolate the cable
- C.
To ground the cable
- D.
To test the cable
Correct Answer
B. To isolate the cableExplanation
Putting a parking brushing on a transformer is done to isolate the cable. This means that it helps to prevent any unwanted electrical contact or interference between the cable and other components. Isolating the cable ensures that it remains separate and protected, reducing the risk of electrical faults or damage.Rate this question:
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- 43.
To verify your switching procedure before switching on an underground system you would
- A.
Have your secretary type it up
- B.
Not require a switching procedure and do it from memory
- C.
Give it to another qualified employee to check with the single line diagram
- D.
Close your normally open switches
Correct Answer
C. Give it to another qualified employee to check with the single line diagramExplanation
To ensure the safety and accuracy of the switching procedure, it is important to have a second set of eyes review it. By giving the procedure to another qualified employee, they can cross-check it with the single line diagram, which provides a visual representation of the electrical system. This helps to identify any potential errors or discrepancies before actually performing the switching procedure. This verification step adds an extra layer of precaution and helps to minimize the risk of accidents or equipment damage.Rate this question:
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- 44.
An underground conductor attatched to a pole is protected from the mechanical damage by the use of
- A.
Non metalic conduct 2.5 above the ground and .3 below ground
- B.
Approved planking and signs
- C.
Lead sheated cable
- D.
75 mm of concrete
Correct Answer
A. Non metalic conduct 2.5 above the ground and .3 below groundExplanation
The correct answer is to use non-metallic conductors placed 2.5 feet above the ground and 0.3 feet below the ground. This method protects the underground conductor from mechanical damage by keeping it at a safe distance from potential hazards such as vehicles, construction equipment, or accidental digging. The non-metallic material further ensures that the conductor is not susceptible to corrosion or electrical interference.Rate this question:
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- 45.
When pulling underground cable through a conduit you would use a
- A.
Chicago grip
- B.
Kellem grip
- C.
Cresent grip
- D.
Bulldog grip
Correct Answer
B. Kellem gripExplanation
A kellem grip is the most suitable option for pulling underground cables through a conduit. It is specifically designed for this purpose and provides a secure grip on the cable, preventing it from slipping or getting damaged during the pulling process. The kellem grip is known for its durability and reliability, making it an ideal choice for this task.Rate this question:
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- 46.
A load buster tool is to be used
- A.
On sticky elbows
- B.
On all underground switched which have no loadbreak capabilities
- C.
Only on overhead switches
- D.
Only on switches in cubicals
Correct Answer
B. On all underground switched which have no loadbreak capabilitiesExplanation
The load buster tool is designed to be used on underground switches that do not have loadbreak capabilities. Loadbreak capabilities refer to the ability of a switch to safely interrupt the flow of current without causing damage or creating an electrical arc. Therefore, the load buster tool is specifically used for underground switches that lack this capability, allowing for safe and efficient maintenance or repair work to be carried out.Rate this question:
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- 47.
The purpose of silicon grease is
- A.
To make mating of components easier
- B.
To keep office door from squeaking
- C.
To permit tracking from the top of terminator to bonding wire
- D.
To help glue conductor to housing on primary splice
Correct Answer
A. To make mating of components easierExplanation
Silicon grease is used to make mating of components easier. It provides lubrication and reduces friction between the components, allowing them to fit together more smoothly. This can be particularly useful in electronic or mechanical assemblies where tight tolerances are required, as it helps to ensure proper alignment and ease of assembly.Rate this question:
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- 48.
To identify a load break elbow, from a non load break elbow,
- A.
Check for one white band or two white bands around neck of elbow where cable enters
- B.
You would compare size
- C.
You would pull it to see if fuses blow
- D.
Check for gray ring on nose of eblow where it fits onto insert.
Correct Answer
A. Check for one white band or two white bands around neck of elbow where cable entersExplanation
The correct answer is to check for one white band or two white bands around the neck of the elbow where the cable enters. This is a distinguishing feature that can help identify a load break elbow from a non-load break elbow. The presence of one or two white bands indicates that it is a load break elbow.Rate this question:
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- 49.
What increases the burden on a CT
- A.
High impedance
- B.
Conductor size
- C.
Longer secondaries
- D.
Higher primary coltage
Correct Answer
C. Longer secondariesExplanation
Longer secondaries in a CT refers to the length of the secondary winding of the current transformer. When the secondary winding is longer, it increases the resistance and impedance in the circuit, which in turn increases the burden on the CT. This means that the CT needs to work harder to accurately measure and transmit the current. Therefore, longer secondaries increase the burden on a CT.Rate this question:
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- 50.
You use potential tested on an underground system to check for
- A.
Resistance of the cable
- B.
Resistance of the flow in the cable
- C.
Current flow in the cable
- D.
Voltage in the cable
Correct Answer
D. Voltage in the cableExplanation
Potential testing is a method used to measure the voltage in a cable. By applying a known voltage to the cable and measuring the response, it is possible to determine the voltage level in the cable. This is important for ensuring that the cable is operating within its specified voltage range and can help identify any voltage-related issues or faults in the cable.Rate this question:
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