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WorksheetsHydraulics
Total questions: 31
Worksheet time: 18mins
Which pump uses an impeller?
Piston pump
Vane pump
Gear pump
Non-positive-displacement pump
What pushes oil into a positive-displacement pump's inlet?
Pilot oil
Atmospheric Pressure
Case pressure
Signal pressure
Which of the following pumps requires the use of a port plate?
Crescent
Spur
Helical
Herringbone
Which of the following pumps has the most tolerance for dirt contamination?
Gear pump
Vane pump
Piston pump
All pumps have equal tolerance for contamination
Which of the following has a high volumetric efficiency?
Gear pump
Vane pump
Piston pump
All pumps have equal volumetric efficiency
Which of the following has the best mechanical efficiency?
Gear pump
Vane pump
Piston pump
All pumps pumps have equal mechanical efficiency.
Pump manufacturers will break in an external-toothed gear pump, causing which of the following?
Cavitation
Aeration
Gear tracks
Gear galling
During operation, where does the majority of oil travel in an external-toothed gear pump?
Between the two meshing gears
Around the outside periphery
Both A and B
Neither A nor B
What do vane pumps sometimes contain in order to spreed the process of rebuilding the pump?
Port plate
Side plate
Cam ring
Cartridge
Which of the following is the most popular type of piston pump found in mobile equipment?
Rotating-cam radical piston pump
Rotating-piston radial piston pump
Inline axial piston pump
Bent-axis piston pump
Which of the following piston pumps has an eccentric mounted to the pump's input shaft?
Rotating-cam radical piston pump
Rotating-piston radical piston pump
Inline axial piston pump
Bent-axis piston pump
Which of the following styles of pumps uses a swash plate?
Rotating-cam radial piston pump
Rotating-piston radical piston pump
Inline axial piston pump
Bent-axis piston pump
All of the following components are part of the rotating group, EXCEPT?
Barrel
piston and slipper assembly
valve plate
Bearing plate
Which of the following plates is commonly coated in bronze, pinned to the barrel, and rotates at pump rpm?
Side plate
port-plate
Valve plate
Bearing plate
Bent-axis piston pumps use valve plates with what type of shape?
Flat
Partial spherical shape
Octal shape
Hex shape
Which of the following is used to machine the rotating group components?
Lapping machine
Desktop belt sander?
Hand grinder
Hand file
Which of the following is used to machine the rotating group components?
Lapping machine
Desktop belt sander
Hand grinder
Hand file
Inline axial piston pumps typically have how many pistons?
Three
Four
Six
None
Which of the following inline axial piston pump components has the primary responsibility to shut off pump flow?
Bias spring
Control piston
Relief valve
Bias piston
In a simple enclosed hydraulic system with pistons of different surface area, which requires the most force to move it?
The larger Piston
The smaller Piston
The force required to move each piston will be equal.
Neither can move due to incompressibility of fluid.
Which of the following is a double acting cylinder?
Identify the hydraulic component from the given symbol.
4/3 way D.C.V.
4/2 way D.C.V.
4/2 way D.D.T.
4/3 way D.D.C
If a downward force is applied to piston A, it will be transmitted through the system to piston B.
According to Pascal’s law,the pressure at piston A (P1) equals the pressure at piston B (P2).
True
False
Fluid in a fluid power system can be
a liquid
a gas
a gas or a liquid
difficult
Hydraulic devices transmit power using
an incompressible fluid
a compressible fluid
an incompressible gas
a compressible gas
What is "D" in this image
Piston, Cylinder or Actuator
Pump
Directional Control Valve
Reservoir
The output force at piston B is __________ than the force input at piston A.
less than
greater than
the same as
not enough info to answer
Select the machine which does not use hydraulics.
What is the use of end position cushioning of a double-acting cylinder, as shown below?
It protects the cylinder against excessively high air pressure.
It reduces the noise of the escaped air.
It prevents a hard striking of the piston at the end positions.
It holds the piston in position.
It controls the speed motion of the cylinder during extension and retraction.
