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PLTW POE Unit 3.2

PLTW POE 3.2 Fluid Power

QuestionAnswer
Absolute Pressure The total pressure exerted on a system, including atmospheric pressure.
Atmospheric Pressure The pressure exerted by the weight of the atmosphere above the point of measurement.
Boyle’s Law The volume of a gas at constant temperature varies inversely with the pressure exerted on it.
Charles’ Law States that the volume of a confined gas is proportional to its temperature, provided its pressure remains constant.
Check Valve A valve that allows flow in one direction but prevents flow in the opposite direction.
Compressor An air pump that compresses air into a receiver tank.
Crank A part of an axle or shaft bent out at right angles, for converting reciprocal to circular motion and vice versa.
Cylinder A device used to convert fluid power into mechanical power in the form of linear motion.
Directional-Control Valve Used to control which path fluid takes in a circuit.
Double-Acting Cylinder A cylinder that can act under pressure in both directions (extend and retract) to move a load.
Filter A device used to remove contamination from a fluid.
Flow Meter A device used to measure flow rate.
Flow Rate The volume of fluid that moves through a system in a given period of time.
Flow Velocity The distance the fluid travels through a system in a given period of time.
Flow-Control Valve Used to start and stop flow in a circuit.
Fluid Power The use of a fluid (liquid or gas) to transmit power from one location to another.
Gay-Lussac’s Law The absolute pressure of a confined gas is proportional to its temperature, provided its volume stays constant.
Hydraulics The use of a liquid flowing under pressure to transmit power from one location to another.
Lubricator A device used to spray an oil mist into the stream of a pneumatic system.
Pascal’s Law Pressure exerted by a confined fluid acts undiminished equally in all directions.
Piston A sliding piece moved by or moving against fluid pressure which usually consists of a short cylindrical body fitting within a cylindrical chamber or vessel along which it moves back and forth.
Pneumatics The use of gas flowing under pressure to transmit power from one location to another.
Pressure The force per unit area exerted by a fluid against a surface.
Pressure Regulator A type of pneumatic pressure control valve that controls the maximum pressure in a branch of a circuit.
Pressure Relief Valve A type of pressure control valve that limits the maximum pressure in a hydraulic or pneumatic circuit.
Pump A device used to create flow in a hydraulic system.
Receiver Tank A device that holds the compressed air in a pneumatic system.
Reservoir The tank that holds the fluid in a hydraulic system.
Single-Acting Cylinder A cylinder that acts under pressure in one direction only and returns automatically when the pressure is released.
Solenoid A switching device that uses the magnetic field generated by an electrical current for actuation.
Transmission Lines Used to transport fluid in a circuit.
Valve Any device that controls, either automatically or manually, the flow of a fluid.
Viscosity A measure of a fluid’s thickness or resistance to flow.
Volume The amount or quantity of something.
Created by: siegrist