What is a bevel cut?

A bevel cut is characterized as a cut made at a 45° angle along the edges of insulation materials. This technique is used to facilitate better fitting and joining of insulation pieces, helping to reduce gaps and improve the effectiveness of thermal insulation. By beveling the edges, it promotes a clean and smooth transition between surfaces, which helps to optimize thermal efficiency and reduces the likelihood of air leaks. This is particularly important in insulation work, where maintaining the integrity of thermal barriers is crucial.

The other definitions do not describe a bevel cut accurately. A straight cut at a 90° angle refers to a standard perpendicular cut, which does not provide the angle required for a bevel. A random angle cut for aesthetics does not convey the specific purpose or standardized angle associated with bevel cuts. Lastly, a type of insulation joint suggests a method of connecting pieces but does not capture the specific angle and technique inherent to a bevel cut. Thus, the key aspect that defines a bevel cut is its angled nature, specifically at 45 degrees, making the second choice the correct answer.