In a fluid pump, the section that contains parts which are directly involved in moving the fluid.


Related Terms

CENTRE OF BUOYANCY

The center of the area of the underwater transverse or longitudinal section of a hull at a particular trim, hence the point at which the force of buoyancy is regarded to be acting vertically upwards.

PIVOTED WINDOW

A window having a section which is pivoted near the center so that the top of the section swings in and the bottom swings out.

PISTON DISPLACEMENT

The volume which a piston in a cylinder displaces in a single stroke, equal to the distance the piston travels times the internal cross section of the cylinder.

PHLEGER CORER

A device for obtaining ocean bottom cores up to about 4 feet (1.2 meters) in length; consists of an upper tube, main body weight, and tailfin assembly with a check valve that prevents the flow of water into the upper section and a consequent washing out of the core sample while hoisting the corer.

PERMISSIVE BLOCK SYSTEM

A block system in which a railroad train is permitted to enter a block section already occupied by a train.

NOZZLE THROAT AREA

The area of the minimum cross section of a nozzle. npin transistor

NEUTRAL FIBER

A line of zero stress in cross section of a bent beam, separating the region of compressive stress from that of tensile stress.

MOMENT DIAGRAM

A graph of the bending moment at a section of a beam versus the distance of the section along the beam.

MODULUS OF RUPTURE IN BENDING

The maximum stress per unit area that a specimen inner portion of a section of wood.

MICRO HEAT PIPE

A very small heat pipe that has a diameter between about 100 micrometers and 2 millimeters (0.004 and 0.08 inch) and a triangular cross section or other cross section with sharp corners, and that uses the sharp corner regions instead of a wick to return the working fluid from the condenser to the evaporator; it has potential applications in the electronics (cooling circuit chips), medical, space, and aircraft industries.

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