Hydraulics Word Scramble

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Term	Definition
Liquid in a Hydraulic system, Gas or air in a Pneumatic system	What does a fluid power system use as the medium through which to transmit force from one part of the system to the other?
Blaise Pascal	Who first formulated that 'a change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid'?
Pressure	Pascal's can be used as a unit of measurement for __________?
Pressure	_____________ is force per unit of area.
The larger piston	In a simple enclosed hydraulic system with pistons of different surface area, which requires the most force to move it?
Multiplied	If force is applied to the smaller piston, the force will be ____________ at the larger piston?
Liquid	Hydraulic systems allow force to be transmitted by the use of_________.
Incompressible	Liquids are mostly ________________.
PSI	Pressure is measured in __________.
Force Divided by Area	When pressure is unknown, it is calculated as _____________.
Pressure Times Area	When force is unknown, it is calculated as _______________.
Hydraulic Pump	The ________________ is used to force the fluid from the reservoir to rest of the hydraulic circuit by converting mechanical energy into hydraulic energy.
The extension speed stays the same	What happens to the extension speed of a cylinder rod when the rod diameter decreases, the pressure increases, but the flow rate to the cylinder stays the same?
Synchronized	Two cylinders that work together in unison are said to be _____________________.
The Rate At Which Work Is Done.	Power is __________________________________.
Using a cylinder of greater size without changing the flow rate to the cylinder	Two ways to decrease the speed at which a cylinder rod extends or retracts are by using a flow control valve to decrease the flow rate into the cylinder and by __________.
Work	What is the motion of a load through a distance that results in something useful being done?
Limit	It is necessary to have a pressure relief valve in order to _________________ the maximum system pressure and working forces.
Reservoir	In a hydraulic circuit, the ________________ holds the oil.
Small	Hydraulic power requires a ______________ amount of energy to control and transmit tremendous power.
Filters	____________ are used to remove any foreign particles so as keep the fluid system clean and efficient, as well as avoid damage to the actuator and valves.
Pressure	The _____________port on the power unit provides oil under pressure to the circuit.
Confined	Hydraulic pressure created on a ___________ liquid generates forces that can lift heavy loads
Decrease	Using a cylinder of greater size without changing the flow rate to the cylinder will ______________ the speed of the cylinder.
Liquid	Hydraulics uses _______________ to transmit power.
Hydraulics	Automobile brake systems use ______________________.
Power Input Device	The pump that provides hydraulic power to the system. The pump draws oil from the reservoir and pumps it into the supply line. This component is called the _______________.
Control Devices	____________________ are valves that control direction, pressure, and flow rate of the pressurized oil in the hydraulic system.
Power Output Device	Hydraulic power is converted back into mechanical power at the ______________________.
Conductors	__________________ transmit the liquid in a hydraulic system.
Mineral Oil	Hydraulic fluid is typically _____________________.
Directional Control Valve	What does D.C.V stand for?
Hydraulic Jack
Force	Pressure is a measure of _________________ intensity.
Pascals	The units of pressure measurement used in the S.I. system are _________________.
Actuator	The power output device of a hydraulic system is know as the ____________________.
Cylinders	Actuators that produce straight line mechanical motion are called ______________________.
Motors	Actuators that produce rotary motion are called ______________________.
Mechanical	The actuator converts hydraulic energy into _______________________ energy.
Clockwise	To increase the pressure setting of a relief valve, turn the adjustment knob _________________.
Minimum	Power units are normally stopped and started with the relief valve set at the _________________ pressure.
Temperature	The liquid level gauge often indicates the oil's __________________________ as well as its level.
Filter	Pumps always have a(n) _______________________ attached to their suction lines to clean the oil.
Springs	_______________ are used to hold the position of a 3
Double	Action
Quick Connect	A(n) __________________________ fitting is used whenever there is a need to frequently disconnect circuits.
Bourdon Tube	A ___________________________ pressure gauge uses a curved tube to indicate pressure.
Tee	Two branch circuits are connected with a _____________________.
Cross	Three branch circuits are connected with a _____________________.
Positions, Ways	A 3/4 DCV refers to the number of ______________ and ___________.
Hydraulics	Vehicle lifts use which type of fluid power system?
Fluid injection injury	Serious injury associated with pinhole leaks in hydraulic lines.
Power Unit	Contains the pump that provides fluid flow through the system
Control devices	Devices that control the fluid direction and flow throughout the system
Actuator	Component that does work in a fluid power system
Liquid level gauge	Indicates the oil level in the hydraulic reservoir
Suction line filter	A filter that oil flows through before it goes into the pump
High viscosity	Thick fluid viscosity
Schematic diagrams	Identifies components and circuit design
True	Pinhole leaks in a pressurized line can penetrate leather gloves
True	Fluid injection injury requires immediate medical attention.
Pressure gauge	Measures system pressures
Piston	Part of a cylinder the oil exerts its pressure on
Quick connect fittings	Allow easy disconnecting and connecting of hydraulic lines
Hydraulic motor	Produces rotary motion
Fixed Displacement	General displacement of hydraulic motors
True	Preventive maintenance of a hydraulic system involves replacing oil filters
Needle valve	Another name for a flow control valve
Vaporous cavitation	Caused by water in a hydraulic system
Prime mover	Electric motor or gasoline engine that turns the pump
Filler/breather	Where oil is added to the reservoir
Power unit	Prime mover, pump, and reservoir
Check valve	Allows flow in only one direction
A and B	DCV ports that the actuator is connected to
Pressure relief valve	Limits the maximum system pressure and working forces
Flow Meter	Device used to determine is fluid is flowing within a hydraulic system
Temperature	Liquid level gauges sometimes indicate the oil
Gear on Gear pump	Pump that contains two gears that turn in the opposite direction
Spring	3 position DCV is held in the middle position by a
Hydraulics	Fluid power system that is used when rigidity is required
Force	Area times pressure equals
Square footage	Length times width equals
Cubic footage	Length times width times height equals
Pressure	Resistance of a hydraulic system to fluid flow causes
compression	Expanding hoses can give the appearance of
4/3 DCV	DCV with 4 fluid paths and 3 positions
Directional Control Valve	DCV stands for
International Standards Organization	ISO
National Fluid Power Association	NFPA
American Society of Mechanical Engineers	ASME
Newton	SI Unit for Force
Pascal	SI Unit for Pressure
Pound	English unit for Force
PSI	English unit for Pressure
Pounds per square inch	PSI
14.7 PSIA	Atmospheric Pressure
Pounds per square inch gauge	PSIG
Pounds per square inch absolute	PSIA
Cylinder and motor	Two types of hydraulic actuators
Vacuum	Pressure below zero on a pressure gauge

Created by: Mr. Davis

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