American Home Inspectors Training (AHIT) Practice Test

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Which type of copper pipe is recognized for being the lightest?

  1. M

  2. Type K

  3. Type L

  4. Type M

The correct answer is: Type M

The lightest type of copper pipe is Type M. This type of pipe is characterized by its thinner walls compared to the other types, which include Type K and Type L. Type M is often used in residential water supply and heating applications due to its lightweight nature, making it easier to handle and install. The lower wall thickness also makes it more affordable and typically sufficient for the pressures and uses found in residential settings. Types K and L have thicker walls and are thus heavier, which makes them better suited for applications requiring increased strength and durability, such as underground or high-pressure applications. Therefore, when considering the lightest option in copper piping, Type M is indeed the correct choice.

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