These hats cover a multitude of sins, firstly the communication hat that is used when bull****ing, I mean explaining to the customer what the problem is or when having a good moan about the job, as if we do that. The next hat is that of diplomat especially as you are the fifth engineer to attend the same problem this week (reference-rubber ball) and the customer is rather upset. Also, reference communication. The majority of engineers are blessed with common sense and some are not. But we are not all perfect, we all have our weaknesses and strengths whether it be in the mechanical or electrical hats that we wear when performing the role of refrigeration engineer, some people wear these hats well, some not so well and some not at all. Some people claim to have these particular hats, but nobody has ever seen them.