Question

type i - question # 1
a passive system - dependent recovery process for small appliances;
a still uses a pump to recover refrigerant.
b must use a pressure relief device when recovering refrigerant.
c captures refrigerant in a non - pressurized container.
d can only be performed on a system with an operating compressor.

Explanation:

A passive system - dependent recovery process for small appliances uses the pressure difference in the system rather than an external pump. It must use a pressure relief device to prevent over - pressurization during refrigerant recovery. It doesn't use a pump (eliminating A), captures refrigerant in a pressurized container (eliminating C), and can be done on non - operating compressors (eliminating D).

Answer:

B. must use a pressure relief device when recovering refrigerant.