Schematics And Symbols Flashcards
Learn about schematic drawings and their symbols
A schamatic helps you understand what is happening in a system through
symbols and lines
In a DC circuit the electrons flow from
Negative to positive and steadily in one direction
The direction of fluid flow in a piping diagram is indicated…..
By arrows
More than one arrangement (reverse or alternate flow) of flow within a piping system is often indicated in a…..
Separate smaller diagram called a supplementary diagram
What is a cutaway diagram?
It is a double line drawing showing a system with some internal detail.
If the title of a schematic does not specify the type of system it represents you should….
Look for other clues such as
• title
•legend- info on lines and symbols
•parts list and the parts used for them
What can help make a drawing clearer or easier to understand?
Notes by the engineer or technician who prepared the drawing
What does a line of short dashes represent on a schematic?
Fluid power diagram - drain line
Electrical diagram - exposed wiring
Piping diagram - vent line
General electrical symbols
A
Do you wiring diagrams how the parts are connected internally or externally?
Externally
How do you control and adjust flow in a piping system
They are controlled with valves.
An elbow in a piping system usually changes what?
It changes the direction of flow.
What does a reducer do in a piping system?
Connects two pipes of different diameter.
What designates a flanged fitting when looking at symbols.
two small interjecting lines at the openings indicate a flanged fitting/pipe
A circuit in which total circuit current flow from one load to the next.
A series circuit.
In a circuit, each load can be turned on and off independently of each other.
A parallel circuit.
Which valve is best for quickly starting and stopping flow?
A plug or cock valve.
When should check valves be used?
To ensure fluid flows in only one direction.
What is the symbol for a glove valve.
A bowtie symbol.
Sometimes measurements or sizes are on the symbol, other times they are in a side note. what is the last number in the size?
It is the branch line size.
How many different kinds of fluid power systems are there?
There are 2.
Hydraulic system handles liquids.
Pneumatic system handles air or gases.
What are the basic elements of a fluid power system?
reservoir- stores fluid pump- provides flow and pressure actuator-reacts to pressure and does work valves-direct and adjust flow piping-connect parts of the system
What is the symbol for a sealed or pressurized pneumatic receiver.
looks like an empty pill
Symbols describe many parts of the system to us such as….
It shows connections, flow paths, and function.
It does not show physical arrangement.
