WorksheetsHydraulic
Total questions: 99
Worksheet time: 3hrs 46mins
Name this schematic symbol.
3/2 hand lever valve
4/2 hand lever valve
4/3 hand lever valve with shutoff position
2/2 way stem actuated
Which of these is a hydraulic pump unit?
Which one of these is a manual shutoff valve?
Which one of these is a hydraulic filter?
Which of these is a spring loaded, pilot operated check valve?
Which is a spring operated check valve?
Which of these is a hydraulic tank symbol?
Which of these is a diaphragm accumulator with shutoff block?
Which of the following is a 2/2 stem actuated valve?
Name this schematic symbol.
Check valve
Spring operated check valve
Spring loaded, pilot operated check valve
Shuttle valve
Which of these is a single acting actuator?
Which of these is a double acting actuator?
The basic idea behind any hydraulic system is very simple: Force that is applied at one point is tranitted to another point using________
A compressible fluid
An incompressible fluid
A cold compress
A hot compress
It's important for a hydraulic system to contain what?
Air bubbles
No air bubbles
Compressible fluid
Compressible gas
Where can you look on your car to see a good example of a basic piston-driven hydraulic system?
The power steering system
The instrument panel
The brake system
The radio system
The great thing about hydraulic systems is that the pipe connecting the two cylinders can be__________
Disconnected, yet still operate
Any length and shape
Filled with air
All of the above
Which one of the following is an example of a hydraulically operated machine?
A wheel barrow
A laptop computer
A bulldozer
A vacuum cleaner
It's very easy to add what to a hydraulic system?
Force multiplication
Force whole numbers
Force square roots
Force perimeter
Large hydraulic machines usually have these to hold the difference in the volume of oil displaced by the two sides of the cylinder
Large diameter lines
Men with buckets
External reservoirs
Extra piston
What is one of the best places to get up close with the large hydraulic machines?
At the local mall
A deli
A construction site
Farmers market
The coins - pennies, nickels, dimes, & quarters are all made with a hydraulic press
True
False
Which of the following sentence is true?
Gases are easy to squish
Liquids are easy to squish
Hydraulics is branch of science and engineering concerned with the use of liquids to perform___________
Electrical task
Magnetic task
Mechanical task
Electronic task
A ________ is a sliding plug that fits closely inside the bore of a cylinder
A jack
A piston
A valve
It's very easy to add what to a hydraulic system?
Force multiplication
Force whole numbers
Force square roots
Force perimeter
What are the two branches of Fluid Power.
Pneumatics and Hydrogen
Pneumatics and Horsepower
Pneumatics and Hydraulics
Pneumatics and Horoscops
Hydraulic systems use ________ to transfer force from one point to another.
Air
Liquid
Solid
Gas
Pneumatics is concerned with a system that uses:
Oil
Expanded air
Compressed air
Electricity
Air is compressible and liquid is incompressible.
True
False
If an object is compressible it can be squeezed to fit into a smaller space than it normally does.
True
False
Select the machine which does not use hydraulics.
What is a hydraulic system?
A system that uses a liquid under pressure to transmit a force to do work.
A system that uses a gas under pressure to transmit a force to do work
Pascal's law.
It uses water to push an object.
Where can you look on your car to see a good example of a basic piston-driven hydraulic system?
The power steering system
The instrument panel
The brake system
The radio system
Which one of the following is an example of a hydraulically operated machine?
A wheel barrow
A laptop computer
A bulldozer
A vacuum cleaner
What is one of the best places to get up close with the large hydraulic machines?
At the local mall
A deli
A construction site
Farmers market
Which of the following sentence is true?
Gases are easy to squish
Liquids are easy to squish
A ________ is a sliding plug that fits closely inside the bore of a cylinder
A jack
A piston
A valve
What does Pascal's law state?
When you apply a small amount of pressure to a compressed fluid, it will send that pressure nowhere.
When you apply pressure to a confined fluid, the fluid will send that pressure out in all directions at the same rate.
When you apply a large amount of pressure to an object, it will float.
When you use a fluid to apply pressure, the pressure will release.
A hoist uses hydraulic pressure to lift a car.
True.
False.
Which one is an example of a pneumatic system?
What is a pump?
A fluid system that allows pressure to be applied to another object.
Compressed air that pushes out pressure from an object.
A mechanical device or part that is used to move a fluid through or into something.
A mechanical device that does not move a fluid.
Which one is an example of valves?
What is a valve?
A mechanical device or part that moves a fluid through or into something.
A system that allows a fluid to move quickly.
A mechanical fluid system that releases pressure.
A mechanical device or part that controls the flow of fluids.
How are a hydraulic system and pneumatic system different?
One is more powerful than the other.
One uses a gas, and the other uses a liquid.
One has a pump, and the other does not.
One has more valves than the other.
How are a hydraulic system and a pneumatic system similar?
Both use a gas.
Both use water.
Both use a fluid to apply force.
Both use valves and pistons.
What parts of fluid systems are also found in the human body?
Valves.
Compressible and incompressible fluids.
Pumps.
Pistons.
A bicycle pump is an example of a ______________________.
Valve.
Pneumatic system.
Hydraulic system.
Piston.
What is Hydraulics a study of ?
The movement of gases that convert fluid energy to mechanical energy
The movement of oil that converts fluid energy into mechanical energy.
The movement of solids within a liquid.
All of the above
What is the formula for calculating Force ?
Density v Volume
Length x Width
3.142 x Atmospheric pressure
Pressure x Area
What type of directional control valve is pictured here ?
3 way 3 position
4 way 3 position
2 way 2 position
5 way 3 position
What is the approx pressure range that Hydraulic systems operate in ?
20 - 40 psi
50-70 psi
700 - 9000
80 - 100 psi
What must you NEVER do with respect to a hydraulic hose leak ?
Turn off the hydraulic pump before you start working on it
Clean up oil spills immediately
Lock and Tag the electrical switch and put the keys in your pocket.
Place your finger over the leak in an attempt to stop this
When refilling oil after servicing a hydraulic system which type of oil should be used ?
Re- use the old oil
Specification 7345-12
Use oil according to the manufacturers specification
Car gearbox oil
What properties should hydraulic possess ?
Ability to absorb water and get thin at high temperature
Ability to absorb water and get thick at low temperatures
Ability to reject water and remain stable across temperature range
It should smell nice
What is the symbol pictured ?
Flow control valve
Double acting cylinder
Adjustable Pressure Relief Valve
Non Return Valve
Once hydraulic oil has done mechanical work where does it return to ?
To the engineering factory drains
Back to the tank or reservoir
To the Atmosphere
Non of the above
What symbol is pictured ?
A hydraulic motor
A heater
A Hydraulic filter
Non Return Valve
Fluid power deals with the transmission and control of energy by a pressurized __________.
Vessel
Directional Control Valve
Electric motor
Fluid
Which of the following is not considered one of the five basic components of a hydraulic system?
Pressure
Control Device
Liquid
Conductor
Power output device
Pressure is equal to force divided by __________.
Weight
Liquid
Gas
Area
What term is used to describe the maximum possible reading of a pressure gauge?
Scale
Graduation
Range
Pascal
Accuracy
Which of the following is not considered part of the power unit?
Pump
Reservoir
Actuator
Prime Mover
Which of the following is not shown in a hydraulic schematic?
Liquid
Pump
Actuator
Relief Valve
Pressure gauge
Quick-connect fittings have a __________ valve built in.
Directional control
Relief
Check
Flow control
Sequence
A(n) __________ fitting is used when you want to connect two circuits to a single supply.
Reducer
Quick-connect
Bushing
Tee
Elbow
The most common type of pressure gauge is the __________.
Piston
Linkage
Bourdon Tube
Temperature
Another name for a cylinder would be a(n) __________.
Power input device
Valve
Control Device
Actuator
A double-acting cylinder will extend when oil flows into the __________.
Rod end
Piston
Cap end
Rod
A directional control valve is used to __________.
Change the direction of the fluid
Limit the pressure
Inform the operator of a problem
Start the power unit
The spool of a directional control valve is shifted to different positions by the __________.
Fluid
Operator
Conductor
Cylinder
Flow rate is equal to volume divided by __________.
Pressure
Time
Gallons
Area
Which type of flowmeter must be oriented in a vertical position?
Rotameter
Turbine
Piston
Vane
A pump produces __________.
Pressure
Flow
Flow and pressure
Pressure drop
Which of the following is not a type of fixed displacement pump?
Centrifugal
Vane
Gear
Piston
The main function of a needle valve is to __________.
Control pressure
Control the speed of an actuator
Turn off the flow
Reduce pressure spikes
The needle valve adjustment screw has a tapered end to adjust the size of the __________.
Orifice
Vane
Valve body
Pressure
Most hydraulic motors are modified designs of __________.
Cylinders
Pumps
Gears
Flow control valves
The hydraulic motor converts hydraulic flow into __________.
Rotary shaft speed
Linear displacement
Negative displacement
Hydraulic pressure
Which of the following is not a type of hydraulic piston motor?
Bent Axis
Radial
Inline
Spring Loaded
Which one hydraulic component may be shown many times in a schematic without indicating that there are more than one of that component?
Pump
Cylinder
Vented reservoir
Directional Control Valve
It applies fluid mechanics in order to generate, control and transmit power through the use of pressurized liquids.
Pneumatics
Hydraulics
Mechanics
Dynamics
It is usually an electric motor or a diesel engine that gets the hydraulic system started by powering the pump.
reservoir
prime mover
actuator
valve
Pneumatic fluids may be water-based, petroleum-based or synthetic.
True
False
Its role is to displace fluid volume against a resistant load or pressure.
diesel engine
electric motor
hydraulic pump
reservoir
In our circulatory system, what is the equivalent of hydraulic fluid?
veins and arteries
sinotrial node
left and right ventricles
blood
These are used to start, stop and direct the flow of hydraulic fluid in the system.
valves
actuators
pump
reservoir
These are used to convert hydraulic energy back to mechanical energy.
valves
actuators
pump
reservoir
It holds a volume of hydraulic fluid and helps air and moisture to be released from the fluid.
valves
actuators
pump
reservoir
Pressure is directly proportional to force.
True
False
How much is the pressure if a force of 10 Newtons is applied to a cross-sectional area of 5 m2 ?
50 Pa
2 Pa
0.5 Pa
15 Pa
When exerting a small force over a small cross-sectional area, pressure can be transmitted to create a large force over a large cross-sectional area.
True
False
How much is the force in Newtons if the pressure in a cross-sectional area of 20 m2 is 10 Pa?
2 N
10 N
200 N
30 N
What are the two branches of fluid power?
Air is incompressible while liquid is compressible.
True
False
Give some uses/examples of hydraulic systems.
The hydraulic power is converted to mechanical power inside the power input device which could be a cylinder or a motor.
True
False
What are the components that constitute the power input device?
pump
reservoir
motor
liquid
The liquid is typically water, and it is stored in a tank or reservoir.
True
False
These control the direction, pressure, and flow of the hydraulic fluid from the pump to the actuator/cylinder.
Valves
Pipes
Pump
Hoses
