California ICC UST Service Technician Practice Exam

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Which type of system does NOT require automatic line leak detectors?

  1. Pressurized piping

  2. Suction piping

  3. Gravity piping

  4. All piping types require detectors

The correct answer is: Gravity piping

Suction piping systems do not require automatic line leak detectors due to their design and operational characteristics. In a suction piping system, the product is drawn through the piping using a pump that creates a vacuum. This setup inherently limits the potential for leaks, as any product that might leak would be drawn back toward the tank rather than escaping into the environment. Gravity piping, on the other hand, may allow for product flow under gravity and is more prone to potential leaks, hence requiring leak detection measures. Pressurized piping systems also necessitate leak detection because they operate under pressure that could lead to significant leaks in the event of a failure. Therefore, the distinction made for suction systems clarifies that they are uniquely designed to manage leaks differently than pressurized and gravity systems.

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