HVAC HVAC Tools and Equipment 3

Question 1

Which instrument is used to measure static pressure within an HVAC duct system?

Accepted Answer

Manometer

Answer

Anemometer

Answer

Thermistor

Answer

Megohmmeter

Question 2

What is the purpose of a megohmmeter (megger) in HVAC electrical service?

Accepted Answer

Test insulation resistance of motor windings

Answer

Measure line voltage

Answer

Check capacitor microfarad ratings

Answer

Verify thermostat wiring

Question 3

A capacitor tester is used in HVAC service to verify:

Accepted Answer

Microfarad (µF) rating of start and run capacitors

Answer

Line voltage at the disconnect

Answer

Refrigerant superheat

Answer

Duct static pressure

Question 4

Which HVAC service tool uses ultrasonic technology to detect refrigerant or air leaks?

Accepted Answer

Ultrasonic leak detector

Answer

Electronic refrigerant leak detector

Answer

Combustible gas detector

Answer

Smoke machine

Question 5

What tool is used to measure the temperature difference (delta-T) across an evaporator coil to assess system performance?

Accepted Answer

Digital contact thermometer with dual probes

Answer

Infrared thermometer

Answer

Wet-bulb thermometer

Answer

Bimetallic strip thermometer

Question 6

A combustible gas detector in HVAC service is primarily used to locate:

Accepted Answer

Natural gas or propane leaks in the heating section

Answer

Refrigerant leaks

Answer

Carbon monoxide in flue gases

Answer

Ozone from UV air purifiers