HVAC Installation Practice Questions

Installation is the largest domain on the NATE HVAC Support Technician exam at 24%. Practice the steps from line set to first start.

Take the timed NATE HVAC Support Technician mock exam

100 questions on the 150-minute clock, weighted like NATE’s HVAC Support Technician outline, with a score for every area and an explanation for every option.

Or try the free installation drill
  • 40 original installation questions, every option explained
  • Tested on: NATE HVAC Support Technician
Free sample · Question 1 of 3Installation

What is fibrous glass duct board joined with?

Choose the best answer

What our installation questions cover

  • Copper: cutting, bending, flares, brazing alloys and flux, protecting valves from heat
  • Leak testing with nitrogen, evacuation, decay tests and charging blends as liquid
  • Ducts: sealing metal duct, flex duct, duct board, plenums and balancing dampers
  • Condensate: slope, traps and secondary drain protection
  • Gas furnaces: clearances, combustion air, sediment traps, gas leak checks, manifold pressure and venting (Category I and condensing)
  • Accessories and wiring: thermostats, humidifiers, air cleaners, disconnects and wire sizing
Line drawing of a torch brazing copper tubing at a condensing unit service valve, with a nitrogen cylinder and regulator and a vacuum pump with a micron gauge

This list is our own summary, written for practice. NATE publishes the full topic lists in its Knowledge Areas of Technician Expertise (KATEs).

Drill installation, then sit the full NATE HVAC Support Technician exam

Take the timed NATE HVAC Support Technician mock exam

100 questions on the 150-minute clock, weighted like NATE’s HVAC Support Technician outline, with a score for every area and an explanation for every option.

Or try the free installation drill

Ideas the questions test most

  1. Leak test with dry nitrogen, then evacuate to remove air and moisture.
  2. A micron reading that keeps rising after isolation means a leak.
  3. The IMC requires condensate drains to slope at least 1/8 inch per foot.
  4. Category I vent connectors rise toward the vent at least 1/4 inch per foot; condensing vents slope back to the furnace.
  5. Seal duct joints with mastic or UL 181 tape after fastening them.

Start the free installation drill · NATE HVAC Support Technician practice test

Common questions

How big is the Installation domain on the NATE Support Technician exam?

Installation is 24% of the 100-question exam, about 24 questions: fabricating copper tubing, installing duct and accessories, field wiring, refrigerant circuit tools, recovery machines and installing gas furnaces.

Is installation on the NATE Core exam?

No. The Core exam covers safety, tools, construction, basic science, desired conditions, measurements and basic electricity. Installation is tested on the Support Technician exam and on NATE’s installation specialty exams.

Take the timed NATE HVAC Support Technician mock exam

100 questions on the 150-minute clock, weighted like NATE’s HVAC Support Technician outline, with a score for every area and an explanation for every option.

Or try the free installation drill

More HVAC topics

Exam format and outline checked November 2026 on natex.org: NATE: Ready-to-Work and HVAC Support Technician certificates · NATE Ready-to-Work KATE (PDF) · NATE HVAC Support Technician KATE (PDF) · NATE Core Exam KATE (PDF) · NATE: Frequently asked questions. NATE has not announced a change to this outline.

NATE is a mark of North American Technician Excellence, Inc. Game Assessment Prep is an independent practice site, not affiliated with or endorsed by NATE. Every question is original; none is taken from NATE exams, NATE study guides or another prep provider.