Installation Techniques Flashcards
7 cards from real AEP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Installation Techniques flashcards as text
When installing a guy wire on a utility pole to counteract line tension, what is the correct angle of the guy wire relative to the pole?
Answer: 45 degrees from the pole (vertical)
Guy wires are most effective when installed at approximately 45 degrees from the pole, providing the best balance of horizontal and vertical load components.
When connecting conductors to a compression lug on high-voltage cable terminations, what is the first inspection step after crimping?
Answer: Verify the crimp indent depth with a go/no-go gauge
A go/no-go gauge confirms that the crimp indent reached the minimum depth required for a gas-tight, low-resistance connection.
What is the maximum number of 90-degree bends allowed between pull points in a conduit run per the NEC?
Answer: Four 90-degree bends (360 degrees total)
NEC 358.26 (and similar articles) limits total bends between pull points to 360 degrees to ensure conductors can be pulled without excessive friction.
When installing a recloser on a distribution feeder, where should the ground lead be connected?
Answer: To the system neutral and then to a driven ground rod at the structure
The recloser ground lead is connected to the multigrounded neutral and a local ground rod to ensure fault current returns safely and protective devices operate correctly.
What is the purpose of a vibration damper (Stockbridge damper) installed on transmission conductors?
Answer: To suppress Aeolian vibration and prevent fatigue failure
Stockbridge dampers absorb and dissipate Aeolian vibration energy, preventing fatigue cracks from forming in the conductor strands.
When installing cables in a cable tray, what is the maximum fill percentage allowed for ladder-type cable tray per NEC Article 392?
Answer: 100% of tray depth in a single layer
NEC 392.22 allows cables in ladder or ventilated trough cable trays to fill to 100% of the tray interior depth when installed in a single layer.
During the installation of a new substation power transformer, why must the transformer tank be purged with dry nitrogen before oil filling?
Answer: To remove moisture and air that could degrade insulation and cause oxidation
Nitrogen purging displaces atmospheric moisture and oxygen that would degrade oil dielectric properties and accelerate insulation oxidation.