HVAC Youtube.

What is the typical temperature rise across a heat pump coil in heating mode?

• 5 to 10°F

• 10 to 15°F

• 15 to 20°F

• 40 to 45°F

In air conditioning mode, what is the typical temperature drop across the evaporator coil?

• 5 to 10°F

• 10 to 15°F

• 15 to 20°F

• 25 to 30°F

What is the typical temperature rise across the coil when auxiliary heat (emergency heating) is activated?

• 10 to 15°F

• 15 to 20°F

• 25 to 30°F

• 40°F

How deep should the plastic piping of a geothermal heat pump be buried to utilize stable earth temperatures?

• 2 to 3 feet

• 4 to 6 feet

• 8 to 10 feet

• 12 to 15 feet

At what approximate temperature does the earth remain consistent below 5 feet depth for geothermal heat pumps?

• 32°F

• 42°F

• 52°F

• 62°F

When an air return is located outside a room (e.g., in a hallway), how should the door be adjusted for proper air circulation?

• The door should be sealed tightly.

• The door should be trimmed at the top to allow airflow.

• The door should be trimmed at the bottom to provide at least a ¾-inch air circulation gap.

• The door should be left slightly open at all times.

What happens if air cannot circulate properly into a room with an air return located outside?

• The room cools faster.

• The room becomes pressurized and cannot accept more cool air.

• The air conditioning system becomes more efficient.

• The room becomes overheated due to a lack of airflow.

What does "slugging" refer to in an HVAC system?

• When gas refrigerant enters the compressor too quickly.

• When liquid refrigerant enters the compressor instead of gas.

• When air is trapped in the compressor.

• When the compressor operates too efficiently.

What is the most common cause of slugging in an HVAC system?

• The refrigerant absorbing too much heat at the evaporator.

• The refrigerant not absorbing enough heat at the evaporator.

• A malfunctioning thermostat.

• Excessive airflow through the system.

Which of the following can contribute to slugging in an HVAC system?

• High refrigerant pressure.

• Dirty filters, clogged coils, or a malfunctioning blower.

• Excess refrigerant charge.

• Low ambient temperature.