ACR is a type L that has been:

ACR is a type L that has been:
 
  A) Cooled. B) Dehydrated. C) Lengthened. D) Heated up.

---

[Ques. 2] The fins on finned tube coils increase heat transfer by:
 
  A) Increasing the laminar air flow through the coil.
  B) Increasing the surface area exposed to the air.
  C) Directing the air smoothly across the coil.
  D) Increasing the laminar refrigerant flow through the coil.

---

[Ques. 3] What are the chemical components of HFC refrigerant?
 
  A) Helium, Freon, and chlorine B) Hydrogen, fluorine, and carbon
  C) Helium, fluorine, and chlorine D) Hydrogen, Freon, and chromium

---

[Ques. 4] Copper tubing that comes in rigid, straight lengths is called:
 
  A) Tempered copper. B) Hard copper. C) Soft copper. D) ACR copper.

---

[Ques. 5] What is the purpose of low ambient controls for air-cooled condensers?
 
  A) To control the ambient temperature
  B) To increase the fan speed to compensate for low barometric pressure
  C) To maintain a minimum head pressure, even at lower-than-normal operating conditions
  D) To maintain a maximum head pressure, even at lower-than-normal operating conditions