Residential HVAC Installation Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Residential HVAC Installation Exam with this comprehensive quiz. Test your knowledge with multiple-choice questions and get ready to excel in your HVAC installation career.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is a micron gauge used to measure?

Vacuum pressure in inches of mercury
Air temperature in Celsius
Absolute pressures below 1 mm Hg
Outdoor humidity levels

The correct answer is: Absolute pressures below 1 mm Hg

A micron gauge is a tool used to measure absolute pressures below 1 mm Hg. It is specifically designed to measure very low pressures, such as those found in HVAC systems during evacuation processes. It can accurately measure pressures in the micron range, which is crucial for ensuring that the system is free of contaminants and moisture. This makes option C the correct answer. Option A is incorrect because a micron gauge is not used to measure vacuum pressure in inches of mercury. Option B is incorrect as a micron gauge does not measure air temperature in Celsius. Option D is also incorrect as outdoor humidity levels are not measured using a micron gauge.