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.
Men's Suit & Sport Coat Size Conversions. â¢ If your over-arm measurement is more than 7 larger than your chest measurement, choose a suit one size larger than your chest. â¢ Suits have what is called a drop, which is the difference between the size of the jacket and the size of the pants. Classic-fit suits typically have a 6 drop, meaning that a size 38R jacket is paired with size 32 pants. Trim-fit and extra-trim-fit suits typically have a 6 to 7 drop.