Final answer:
It is false that the refrigerant live pressure is used to push oil out from the oil pot in an ammonia refrigeration system. Pressure management is key to system safety and functionality, not as a method for oil removal.
Step-by-step explanation:
When considering the process of removing oil from an ammonia refrigeration system, the statement that the refrigerant live pressure is used to push out oil from the oil pot is false. In such systems, using the refrigerant's live pressure to expel oil would be neither safe nor effective. In practice, refrigerant pressures are carefully managed and controlled during maintenance procedures to ensure safety and proper functioning of the system. The ammonia acts as a refrigerant within this system, and while pressure plays a crucial role in its operation, specifically in terms of maintaining equilibrium reactions for effective refrigeration cycles, it is not used to force oil out of the system in the manner suggested.