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.
Best Answer: A Pullover doesn't have buttons and can be worn with a collared shirt underneath. A Sweater is usually worn alone and is also a pullover (no buttons) A Jacket is something you wear over your clothes to keep you warm. A sweatshirt is a printed version of a sweater, only cheap. A Coat you wear when it's cold and over your clothes-heavier than the jacket (Jacket-fall, Coat-winter)