HVAC Air Conditioning 2

Question 1

What is the primary purpose of a metering device in an air conditioning system?

Accepted Answer

Reduce refrigerant pressure and control flow into the evaporator

Answer

The metering device (TXV, orifice, etc.) drops refrigerant pressure and regulates flow entering the evaporator so it can absorb heat and evaporate properly.

Question 2

A system is operating with high suction pressure and high discharge pressure. Which condition does this most likely indicate?

Accepted Answer

Overcharge of refrigerant

Answer

Both high suction and high discharge pressure together typically indicate an overcharge of refrigerant in the system.

Question 3

What does EER stand for in air conditioning ratings?

Accepted Answer

Energy Efficiency Ratio

Answer

EER stands for Energy Efficiency Ratio, which is the cooling output in BTU/hr divided by electrical input in watts at a specific test condition.

Question 4

In a split-system air conditioner, which component is located in the outdoor unit?

Accepted Answer

Condenser coil and compressor

Answer

The outdoor unit of a split system contains the condenser coil, condenser fan, and compressor.

Question 5

What is subcooling in an air conditioning system?

Accepted Answer

Lowering refrigerant below its saturation temperature in the liquid state

Answer

Subcooling is the number of degrees the liquid refrigerant has been cooled below its saturation (condensing) temperature.

HVAC Practice Test

HVAC Practice Test

HVAC Air Conditioning 2