Red Seal Carpenter Complete Practice Exam 2026

Question: 1 / 400

In carpentry, what does "plumb" refer to?

A horizontal alignment

A vertical alignment

In carpentry, "plumb" specifically refers to a vertical alignment. This term is commonly used to describe elements that are perfectly vertical or straight up and down. When a surface or line is plumb, it means it is aligned in the direction of gravity, ensuring that structures such as walls and posts are correctly set within the vertical plane.

This is essential in construction and carpentry because any deviation from plumb can lead to structural issues or misalignments as a project progresses. For instance, a wall that is not plumb may not be able to support a roof correctly, leading to further complications.

When carpenters check for plumb, they often use tools like plumb bobs or levels to ensure that their installations meet the necessary vertical standards. Understanding the concept of plumb is fundamental for achieving precise and durable construction.

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An angle of 90 degrees

A type of measurement tool

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