Cableman book semester 1 Final 104 Exams Curated Questions for Confident Learning With Correct And Complete Solutions
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Course
Cableman book
Institution
Cableman Book
___________ Mat bonds to the protective grounds will keep a lineman at an equipotential zone. - ️️Ground Gradient Mat
A ________ Will confirm that a underground cable has been isolated. - ️️Spike tool
A customer fed by a secondary underground cable complains about erratic power. A voltage...
___________ Mat bonds to the protective grounds will keep a lineman at an equipotential zone. - ✔
✔ Ground Gradient Mat
A ________ Will confirm that a underground cable has been isolated. - ✔ ✔ Spike tool
A customer fed by a secondary underground cable complains about erratic power. A voltage reading at
the customer may show a normal voltage. What else should be checked? - ✔ ✔ A break in insolation,
check if water or moisture has gotten in the load.
Anytime a person is in parallel with any load in a circuit, that person is exposed to some voltage and
some current regardless of the amount of resistance being offered by the current. - ✔ ✔ True
At what locations is an underground cable exposed enough to be able to apply grounds? - ✔ ✔ Riser
pole, Transformer, Live switch, gear cabinets, elbow, live front.
How are the voltage and current of an incoming high voltage transmission line measured? - ✔ ✔
Specialized transformers have low voltages that run through the meters to track the voltage.
How can a boom tip winch break off of a digger derrick? - ✔ ✔ If it is trying to lift more than it
should. If the lifting capacity chart is not followed it can be bad. The winch is stronger than a boom.
How can a lineman reduce the risk of a pole falling to the ground while working aloft? - ✔ ✔ Report
if a pole seems very old or rotted, poles with burn marks, Pooles with wood pecker holes, look for rotted
anchors.
How can an isolated line be proven to be De energized - ✔ ✔ Having a physical visible open. Apply a
potential tester, Test with an approved tester. Then ground it.
How can broken strands cause problems when using an old conductor to pull in a new conductor? - ✔
✔ It can fall out and cross circuits stream. I could bunch up and touch other phases or the Neutral.
How can opening a grounding connection in a substation be a hazard? - ✔ ✔ Interrupting a current
flow and create a high voltage across the open point.
How does a lineman determine the size of grounds needed in a given location? - ✔ ✔ Needing size of
ground will be specified by an engineer although a big feeder means bigger grounds.
, How does bonding a grounding set to a structure provide an equipotential zone for a lineman? - ✔ ✔
If all parts of the lineman's body are at the same potential, there will be no current flow.
How does good grounding of the neutral improve overcurrent protection on a circuit? - ✔ ✔ Ot
provides a fast trip out.
How does working on more than a 5 degree slope affect the Ariel device? - ✔ ✔ The danger of
rotation gear failure or tipping over increases with the slope.
How is corona loss minimized on a transmission line? - ✔ ✔ Having enough space between
conductors, smoothing any rough or sharp points. Corona rings spreads out stress from voltage.
How much current would a 240 V heater with 20 ohms of resistance draw? - ✔ ✔ Resistance of 12
I - ✔ ✔ Ohms or Amps (Flow)
If a recluse is bypassed with a solid jumper or switch, what is the consequence of a conductor falls to the
ground somewhere downstream? - ✔ ✔ there's no form of protection, maybe no form of protection
to trip out the circuit to re-energize the circuit.
If the voltage on a transmission line could be doubled, How much more energy would it be able to
transmit? - ✔ ✔ The energy that can be transmitted is quadrupled.
In relation to the peak value of AC power, What value does an ordinary ammeter and voltmeter
Measure? - ✔ ✔ The effective value or the peak value
Increase conductor/ Conductor ground. Using Corona rings to spread stress over a large area. - ✔ ✔
Smoothing only rough edges can help avoid.
List 4 items in a substation design that are meant to protect the public. - ✔ ✔ Fences with barbed
wire, Warning signs (No Trespassing) High voltage Signs, The grounded grid around the substation also
protects people.
Name 2 ways for positively identifying a neutral wire - ✔ ✔ A copper wire running down the pole.
Wire connected to a ground rod.
Name 3 ways an operator can reduce the risk involved with operating a material handling Ariel device. -
✔ ✔ Keep the load low and only raise and lower it after reaching the right position. Check the angle
indicator on the boom. Check the chart on how much each stage can load. Watch for any other hazards
Name 4 alternative electrical energy sources - ✔ ✔ Ocean tides, Wind farms, Geothermal generating
stations, Solar energy, burning of biomass (Steam) Etc.
Based on the safe work model shown in figure 1-2, name three elements that have the most direct
influence on safe work - ✔ ✔ Rules and Regulations, Lockout and Tagout, Job safety planning,
Employee training, Protective equipment.
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