Copper tubing that comes in rigid, straight lengths is called: ...

[tth]

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

Question 2

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

[C.mcnichol98]

Answer to Question 1

B

Answer to Question 2

C

[tth]

Excellent

[Laurenleakan]

Wow, this really help