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WorksheetsHydraulics
Total questions: 23
Worksheet time: 12mins
If an object is compressible, it can be squeezed to fit into a smaller space than it normally does.
True
False
Hydraulic systems use ____________ to transfer force from one point to another.
Liquid
Solid
Air is compressible, and water is incompressible.
True
False
A________________ is a sliding plug that fits closely inside the bore of a cylinder.
A jack
A valve
A piston
Hydraulics is a branch of science and engineering concerned with the use of liquids to perform
Mechanical task
Electronic task
Electrical task
Magnetic task
Where can you look on your car to see a good example of a basic piston- driven hydraulic system?
The instrument panel
The brake system
The radio system
What is one of the best places to get up close with the large hydraulic machines?
At the local mall
Construction site
Your room
Which of the following is an example of a hydraulically operated machine?
A bulldozer
A wheel barrow
A laptop computer
A vacuum cleaner
The study of fluid motion and its applications.
Pneumatics
Mechanics
Electronics
Hydraulics
A liquid or a gas that flows.
Current
Fluid
Tool
Actuator
What is the difference between a liquid and a gas?
Liquid molecules are close together, but not packed. Gas molecules are spread apart and freely moving. Liquids have fixed volume, while gases do not
liquid means a substance that is flowing, and keeping no shape, such as water, whereas gas means a substance in the fundamental state of matter that retains its size and shape without need of a container
Liquids are incompressible because their molecules are close to one another
Gas vibrate and move freely at high speeds
What is meant by the term “incompressible”? What makes liquids incompressible?
able to be made to use less space when it is stored in the memory of a computer or on a disk, by using a special program
Pressure applied to a confined fluid is transmitted undiminished in all directions
Something that is incompressible cannot be mashed into a smaller space. Liquids are incompressible because their molecules are close to one another, even though they are not tightly packed
Use of liquids at high pressure and low flow to perform work
Pressure in a liquid is transmitted equally throughout the liquid.
Pascal's Law
Multiplication of force
Law of Conservation of Energy
Cycle time
An initial effort force puts pressure on a liquid over a given area. This pressure is transmitted throughout the liquid, reaching a second area (in some systems, a third or a fourth, too), in which it exerts a load force.
General function of a pneumatic system
General function of an electronic system
General function of a hydraulic system
General function of a electronic system
How do the pistons in an excavator act like muscles?
They extend and shorten the arm of the excavator, as well as rotating it, and raising and lowering it, allowing it to move much like a human arm.
Two pistons are connected by a pipe. One piston is larger than the other. A small amount of force applied to the smaller piston translates through the hydraulic fluid to a large force applied to the larger piston
split logs and remove the piston from the log once it has been split.
The use of liquids at high flow and low pressure to perform work
Hydraulics
Hydrostatics
Hydrodynamic
Hydropump
Energy may be changed from one form to another, but it cannot either be created or destroyed
Law of OHM
Law of conservation of energy
Multiplication of force
Pascal's law
Directs hydraulic oil through one of more layers of a porous elements that may trap particles
Reservoir
Filter
Strain
Pushbotton
Advantages of hydraulic systems (Two options)
Variable speed
High pressure
Reversibility
Safety hazards
Converts fluid energy into mechanical energy
Rotary actuator
Hydraulic actuator
Linear actuator
Straight line actuator
Measure and shows the pressure being produced in a hydraulic system (Two options)
Multimeter
Manometer
Pressure gauge
Sensor
Delivers the same volume of oil per cycle regardless of the pressure at the pump outlet
Pump
Positive displacement pump
Gear pump
Pressure relief valve
What are the five elements of a hydraulic system?
Driver, pushbotton, motor, control valves, sensors.
Reservoir, gear pump, relief valve, directional control valve and actuator cylinder.
Driver, gear pump, motor, control valves, sensors.
Driver, pump, motor, relief valve, directional control valve
