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.
It is a hybrid of sorts because it is more formal than a sports jacket but unlike the suit jacket, a blazer is not made with a matching pair of trousers. The Fit. Blazers have a looser fit compared to suit jackets. They are also not as structured especially in the shoulder area. 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.