HVAC Math Practice Test 2025 - Free HVAC Math Practice Questions and Study Guide

Question: 1 / 400

If a pipe has a diameter of 4 inches, what is its radius in inches?

4 inches

3 inches

2 inches

The radius of a circle is defined as half of its diameter. For a pipe with a diameter of 4 inches, you can find the radius by dividing the diameter by 2.

When you calculate it:

Radius = Diameter / 2 = 4 inches / 2 = 2 inches.

This result confirms that the radius of the pipe is indeed 2 inches. Understanding this concept is fundamental in HVAC applications, as knowing the dimensions of pipes helps in calculating flow rates, pressure drops, and other critical parameters.

In this scenario, any other option does not appropriately represent the mathematical relationship between diameter and radius. Therefore, the correct answer reflects the accurate calculation of the radius based on its given diameter.

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1 inch

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