HVAC Tools and Equipment Flashcards
6 cards from real HVAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 HVAC Tools and Equipment flashcards as text
A clamp meter (clamp-on ammeter) measures current by detecting what around a conductor?
Answer: Magnetic field
A clamp meter senses the magnetic field produced by current flowing through a conductor, allowing non-contact amperage measurement.
Which tool is specifically designed to detect refrigerant leaks in an HVAC system?
Answer: Electronic leak detector
An electronic leak detector uses a heated sensor or infrared technology to detect halogenated refrigerant molecules at very low concentrations.
What does a digital manifold gauge set provide that an analog set does not?
Answer: Superheat and subcooling calculations
Digital manifold sets calculate superheat and subcooling automatically when connected to temperature clamps, eliminating manual chart lookups.
Which tool is used to cut copper refrigerant tubing cleanly without leaving burrs that could damage a compressor?
Answer: Tubing cutter
A tubing cutter uses a hardened wheel to score and cut copper tubing squarely; the reamer attachment then removes the interior burr.
A nitrogen tank and regulator are used during HVAC installation primarily to:
Answer: Pressure test and purge the refrigerant circuit before brazing
Dry nitrogen is used to pressure-test lines for leaks and to flow through copper tubing during brazing to prevent oxidation scale inside.
What type of scale is required when charging an HVAC system by weight?
Answer: Refrigerant charging scale
A refrigerant charging scale weighs the cylinder during charging to dispense the exact amount of refrigerant specified by the manufacturer.