HVAC HVAC Tools and Equipment

Question 1

Which tool is used to measure the refrigerant pressure on both the high and low sides of an HVAC system simultaneously?

Accepted Answer

Manifold gauge set

Answer

A manifold gauge set connects to both the high-pressure and low-pressure service ports to read system pressures at the same time.

Question 2

What instrument is used to measure airflow velocity in HVAC ductwork?

Accepted Answer

Anemometer

Answer

An anemometer measures air velocity, which is then used with duct cross-sectional area to calculate airflow in CFM.

Question 3

A micron gauge (vacuum gauge) is primarily used during which HVAC service procedure?

Accepted Answer

Evacuating the system to remove moisture and non-condensables

Answer

A micron gauge measures deep vacuum levels (in microns of mercury) to confirm the system has been properly evacuated before refrigerant charging.

Question 4

Which tool is used to flare the end of copper refrigerant tubing to create a leak-free mechanical connection?

Accepted Answer

Flaring tool

Answer

A flaring tool clamps the tubing and uses a cone-shaped mandrel to form a 45-degree flare at the tube end for flare fittings.

Question 5

What is the primary purpose of a refrigerant recovery machine?

Accepted Answer

To remove and store refrigerant from a system before service

Answer

A recovery machine extracts refrigerant from an HVAC system and stores it in a recovery cylinder, as required by EPA Section 608 regulations.

HVAC Practice Test