Illinois State Plumbing Practice Exam

A 90-degree bend represents which fraction of a circle?

1/2 1/16 1/8 1/4

Correct Answer:

1/4

Explanation:

A 90-degree bend is a quarter turn around a circle. A full circle is 360 degrees, so 90 degrees is 90/360 = 1/4 of the circle. That’s why the correct fraction is 1/4. To put it in context, a 180-degree bend would be half a circle (1/2), 45-degree would be 1/8 of the circle, and 22.5-degree would be 1/16 of the circle.

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