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32 Cards in this Set
- Front
- Back
What term is used to describe the amount of force distributed over each unit on the area of an object? |
Pressure |
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Practically all pumps fall within what categories |
Rotary, reciprocating, centrifugal |
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Rotary pumps operate on which displacement principal |
Positive |
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Which pump will deliver a constant volume of fluid at any given rpm |
Gear |
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The inlet port of a vein pump is located in that part of the pump where the chambers are____in size |
Expanding |
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In a vain pump what keeps the veins in contact with the outer side of the pump |
Centrical force |
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Which type of pump is used for applications requiring high pressures and accurate control of discharge volumes |
Reciprocating |
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The volume output of the constant volume piston pump is determined by the angle between the driveshaft and what other component |
Cylinder block |
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One advantage of the variable volume pump is that it eliminates the need for a system____ |
Pressure regulator |
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How many different designs of hand pumps are there |
2 |
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Since linear motion is a back-and-forth motion along a straight line, the cylinder type actuator is also referred to as a____ |
Linear motor |
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The single acting ram applies force and how many directions |
One |
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What type of directional control valve is used to control the single action piston type cylinder? |
Three-way |
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The speed of the rotation of the pump is controlled by what device |
Length of the piston |
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What is another name for the tilting plate of the piston type hydraulic motor |
Swashplate |
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Valves are included in a hydraulic system to control what points |
Direction, volume, pressure |
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What type of valve is probably the most common type of valve element used in directional control valves |
Sliding spool |
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What type of gas is commonly used in gas charged accumulators |
Air and nitrogen |
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What type of hydraulic system has fluid flow but no pressure in the system |
Open center |
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What type of hydraulic system has fluid stored under pressure whenever the pump is operating |
Close center |
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Before you reassemble a hydraulic pump you must lubricate all internal parts with what material |
Hydraulic fluid |
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What color will decomposing hydraulic fluid turn |
Darker |
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What are three common types of rotary pumps |
Gear, lobe, veins |
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A rotary pump is what type of displacement principal and what type of displacement type |
Positive displacement principal and fixed displacement type |
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What is Pasqual's law |
Pressure applied anywhere on a confined fluid is transmitted undiminished in every direction |
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In a gear pump the drive gear is turned by the____shaft |
Driveshaft |
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Fluid power motor is the device that converts___power to___motion and force |
Fluid power to rotary motion or force |
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What is the purpose of a selector valve |
Control the direction of fluid flow |
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What material is a poppet valve usually made of |
Steel |
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On____vent in a reservoir allows air to be drawn in and pushed out by the reservoirs ever-changing fluid level |
Air vent or air breather |
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On_____stores a volume of liquid under pressure for conversion into useful work or to absorb rapid fluid pulstations |
Accumulator |
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What are two types of accumulators |
Spring operated and gas operated |