HVAC servcing Test 1 (week 3)

What are the four types of problems in HVACR?

• • Mechanical

  • Electrical

  • Mechanical and electrical

  • Operator error

• Blowing cold air in heat mode.

  Heat pump running constantly in moderate weather.

  Outdoor unit is blocked.

  Outdoor unit is frozen.

One troubleshooting method will always work in all situations. 

• True

• False

Electrical, mechanical, and electromechanical are all types of ___________.

• wiring diagrams

• test instruments

• voltage feedback

• automatic control

Devices that pass power can be ____________ devices.

• switch or load

• pressurized or non-pressurized

• safety or operating

• . power-passing or power-consuming

The thermostat Y terminal energizes the ___________ circuit.

• cooling

• fan

• ventilation

• heating

The component in the system that is energized when the G terminal is energized is the ________.

• fan motor

• gas valve

• compressor

• electric heat strips

The ______ terminal must be energized in the thermostat for the heat to start.

• H

• W

• Y

• G

The 24-V power circuit in a low-voltage thermostat is connected to the ______terminal.

• W

• R

• Y

• G

A heat anticipator is wired _________ the thermostat contacts.

• a. in parallel with

• b. directly opposite of

• c. far away from

• d. in series with

The cooling anticipator is wired ___________.

• in series with the cooling contacts

• in parallel with the cooling contacts

• next to the liquid line

• inside the indoor unit