In a dry-type direct expansion refrigeration...

Question 1 / 270705eccef9dbacbc34ba4d45f68

Question 1 of 270705eccef9dbacbc34ba4d45f68

In a dry-type direct expansion refrigeration evaporator, what is true concerning the evaporator coils?

Question 1 of 27070

In a dry-type direct expansion refrigeration evaporator, what is true concerning the evaporator coils?

🔍 Key Concepts

• Direct expansion (DX) evaporator operation in a basic refrigeration cycle • Difference between refrigerant side (inside the tube) and medium being cooled (outside the tube) in a dry-type evaporator • Meaning of “dry-type” versus flooded evaporator design

💭 Think About

• In a dry-type direct expansion evaporator, where does the refrigerant actually flow: inside the tubes or outside the tubes? • What substance (air, water, or refrigerant) normally comes into contact with the outside surfaces of the evaporator coils in an HVAC or refrigeration unit? • Why would adding insulation directly on the heat-transfer surface (inside or outside the coil) be a problem for evaporator performance?

✅ Before You Answer

• Verify which side of the coil carries refrigerant and which side carries the medium being cooled (air, water, etc.). • Check whether an evaporator coil’s outer surface is normally insulated or exposed to allow heat transfer. • Confirm what the term “dry-type” implies about how much refrigerant is present in the evaporator and where it is located.

Question 1 of 27070

In a dry-type direct expansion refrigeration evaporator, what is true concerning the evaporator coils?

the coils are covered on the outside with insulation

the coils are coated on the inside with insulation

the coils are surrounded on the outside by refrigerant

the coils are surrounded on the outside by air

Question 1 / 270705eccef9dbacbc34ba4d45f68

Question 1 of 270705eccef9dbacbc34ba4d45f68

In a dry-type direct expansion refrigeration evaporator, what is true concerning the evaporator coils?

Back

Question 1 of 27070

In a dry-type direct expansion refrigeration evaporator, what is true concerning the evaporator coils?