Reading Schematics and Symbols Flashcards
A schematic is made up of
symbols and lines
Doubie line drawings that show the internal details of a pneumatic system are called
Cutaway drawings
In a DC circuit the elections flow from
One direction only
Arrows are used on piping diagrams to indicate the
Direction of flow
In a piping system, an alternate flow pattern is indicated by a
Supplementary diagram
On an electrical diagram, a dashed line indicates a(n)
Exposed wire
Vent lines and drain lines are shown on a hydraulic schematic by
Dashed lines
If a schematic carries no legend, clues about it may be found in the parts list, drawing titles or
Engineers notes
The symbol represents
Gauge (circle with arrow)
Whats the last step in troubleshooting, an electrical circuit when using a schematic?
Examine the actual circuit
Which displayed electrical symbol represents connecting wires?
Lines with a dot connecting
Which displayed electical symbol represents an SPDT switch?
Which dsplayed electrical symbol represents a transformer?
(3s facing each other)
Which displayed elechical symbol represents a fuse?
(Rectangle with lines)
Which displayed electical symbol shows NC contacts?
Normally closed ≠
An electric circuit in which the current path goes from one load to the next is caled
Series
An electric circuit that allows each load to be turned on or off independently of the others
Parallel circuit
A wiring diagram shows how the parts of a circuit are connected
Externally
Wires labeled L on a schematic
Carry power from the source
In the displayed diagram the FORWARD- button is marked
(Not F in the circle)
The flow of material in a piping system is controlled and adjusted by
Valves
Which displayed symbol represents a flanged joint?
(Line with 2 perpendicular lines)
Direction of flow in a piping system may be changed by a(n)
Elbow
What part of a piping system connects two pipes of different diameters?
Reducer
Which displayed symbol represents a screwed tee fitting?
(Upside down T with single lines on each side)
A valve is used to _____ in piping systems
Control the flow
A cock valve is used to
Turn flow on or off quickly
Winch displayed symbol represents a globe vale?
(Bow tie circle shaded in)
A check valve
Allows flow only in one direction
In the symbol displayed, the 2 in. dimension is indicaled by the letter
3 in. X 4 in. X 2 in.
C
Both hydraulic and pneumatic systems
Are fluid power systems
In a fluid power system an ____ reacts to the pressure of the fluid and does
Actuator
The displayed symbol represents a _____ in a ______
Receiver; pneumatic
(Sideways oval)
The basic symbol or a valve shows its connectons, flow paths, and
Functions
Winch displayed symbol represents a valve in the closed postion?
Closed DCV
The composite symbol displayed includes the symbol for a(n)
Electric motor
(M in circle)
Which element of a hydraulic braking system directs the flow of the brake fluid?
Valve
If the fluid in a hydraulic or pneumatic system is used again and again it is called a(n) ____ system
Closed
On a hydraulic or pneumatic diagram, local areas are outined by which of the
_____ _ _ ______ _ _
Which of the symbols below indicates a solenoid operalad device?
Solenoid pic
In a refrigeration subsystem of an AC and R system, what is another term for an e….
Liquid chiller
What does the displayed symbol represent?
Rotary compressor
(Circle with rectangle on top)
In an AC and R system, thermostatic expansion values and ADR Valves are used for ____ control
Direct
In a diagram for an electric control circuit, which of the following shows wiring to be …. the site
___ ____ ____ ____
What solid state device in an A/C system can amplify and switch electrical signals?
Transistor
“Fusion” welding means joining two materials by _____ then together
Melting
The basic method of fusion welding that uses the “squeeze-and-heat” process is ____ welding
Resistance
Which of the following is a symbol for a weld with chamfering?
Sideways V
If the part is to be welded in the field, the weld symbol includes a
Flag
Standard dimensons for a weld
may appear in a legend on the welding diagram
