Describe two ways a process unit ensures its customers continue to receive productwhile the unit is shut down.List the three most common purging methods.What is the purpose of a blind list? Explain...

Describe two ways a process unit ensures its customers continue to receive productwhile the unit is shut down.List the three most common purging methods.What is the purpose of a blind list?

Explain why fall and spring are chosen as turnaround seasons? List four factors that affect the time between unit turnarounds.