HVAC and refrigeration

About this practice suite

This suite prepares candidates for hvac and refrigeration selection in the skilled trades and apprenticeships sector with 5 skill areas: numerical reasoning, mechanical comprehension, electrical reasoning, technical reasoning and safety judgment. Every question was written by Novus editors for this suite — none are taken from live or leaked exams — and the full bank holds 52 scored questions across three modes, plus 8 reserve questions used to vary repeat attempts. Answer keys never ship to the browser: your answers are scored server-side, and results stay on your device.

Skills this suite practises

• Numerical reasoning — Arithmetic, fractions, percentages, ratios, rates, estimation, word problems, and number relationships.
• Mechanical comprehension — Forces, motion, gears, pulleys, levers, fluids, pressure, and basic machines.
• Electrical reasoning — Basic circuits, current, voltage, resistance, symbols, and electrical troubleshooting.
• Technical reasoning — Applied technical principles, diagrams, tools, systems, measurements, and troubleshooting.
• Safety judgment — Hazard recognition, safe sequencing, escalation, and risk controls.

Sample questions from the guided bank

Two of the 10 guided-practice questions, shown exactly as they appear in a session. Answers and explanations are not printed here — keys stay on the server — so open guided practice to answer them and see how you did.

1. An air handler moves 1,200 CFM through four equal supply branches. Ignoring losses, each branch receives:

   • A. 150 CFM
   • B. 300 CFM
   • C. 400 CFM
   • D. 4,800 CFM

2. Which instrument measures temperature at a supply register?

   • A. Thermometer
   • B. Manometer
   • C. Pipe cutter
   • D. Vacuum pump

Practice modes and timing

Guided practice is untimed-feeling and instructional; the mini-test is a short timed check; the full simulation mirrors a complete sitting. All three draw on separate question sets, so moving up a mode never repeats what you practised.

Study outline

Read the study outline for this suite’s skills, timings, and recommended lessons on one printable page, or download its standalone HTML file. The printable page can also be saved as a PDF from your browser.