ocr: URIFICE In this contest, an oritice is a small passage of precise dimensions used to control the flow of fuel. In a carburator, for example, orifices are used to control Idle and Main Jet fuel flows. P-U DIHGRHM AP-D or Pressure-Volume diagram is a method of showing the relationships of piston position, and pressure in a reciprocating engine or pump. Also known as an Indicator Dlagram, when Indicator recorders were used to measure engine pertormance. RETARDER Ab braking system which uses either modified valving in the engine lususally Diesel) or a separate brake (hydraulic turbine or electric ...
