In the case of the motor it is the rotor and the stator and for the pump it is the impeller and the volute (or diffuser). Of course the friction produced by bearings and other mechanical components (seals, stuffing box, etc) also affect pump efficiency, but the impeller and volute have the greatest influence. Lets start our investigation of centrifugal pump efficiency with the impeller.
The differences are minor: 1  A blazer refers to a sportcoat that is made of navy wool, with brass buttons. 2  A suit jacket is the jacket part of a suit. 3  A sport coat is a jacket, cut like a suit jacket or blazer, that doesn't have an accompanying pair of pants - it's a standalone jacket.
A sports jackets will usually come with a sport lapel which can be closed completely to protect the chest and neck area. The sports jacket is also the most casual among the three clothing items discussed today. As such, it is never acceptable to wear a sports jacket when a suit is required. A good idea is to invest in a sports jacket after you have invested in your first suit. A sports jacket will have more uses than a blazer as it lends itself to a number of casual and slightly dressy occasions.