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 only difference between sport coats and blazers is that blazers are always solid-colored, usually blue, black, camel or dark green, while sport coats encompass about everything else. Blazers are considered more basic and more formal than sport coats. Photo Credit Jupiterimages/Brand X Pictures/Getty Images.
The blazer or boating jacket is generally a double-breasted jacket, first worn by men, and normally by schoolboys during the late 19th century in England. While todayâs blazer can be worn by either men or women and normally is available in subdued colors, the early jacket was often striped and made of bright colors. In boysâ uniforms, one side usually had a school or house patch. Other patches like prefect badges might decorate it too.