FAA AMT Airframe Practice Exam 2025 – All-in-One Study Guide to Master Aviation Maintenance Technician Certification!

Question: 1 / 1030

Which substance can reduce the possibility of damage when pulling electrical cables through rigid conduit?

Lubricating oil

Powdered soapstone

When pulling electrical cables through rigid conduit, using a lubricant such as powdered soapstone can help reduce the possibility of damage. Powdered soapstone acts as a dry lubricant that decreases the friction between the cable and the conduit walls, making it easier to pull the cable through without causing abrasions or other damage. This is why powdered soapstone is the most suitable substance for this purpose.

Water is not suitable for this application as it can cause corrosion and damage to the electrical cables. Grease, while a lubricant, may attract dirt and debris, leading to potential issues with the electrical system. Lubricating oil, although a common lubricant, may not provide the same level of dry lubrication and friction reduction as powdered soapstone specifically designed for pulling cables through conduit.

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Water

Grease

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