TPC SCHEMATIC AND SYMBOLS
unlike a dc circuit schematic, a schematic of an ac circuit will have no?
+ or - signs
On a hydraulic or pneumatic diagram, local areas are outlined by which of the following?
--- - - --- - - ----
The symbol shown below represents a _________ joint
-----)------- bell-and-spigot
Which of the lines shown below represent a drain line on a fluid power schematic?
-----------------
On a schematic drawing, a D shape is used to represent all of the following except a(n)
. diode . ground . motor
In a fluid-power system, a(n) _________ reacts to the pressure of the fluid and does the work.
Actuator
In the symbol displayed, the 2-in. dimension is indicated by the letter
C
If the fluid in a hydraulic or pneumatic system is used again and again it is called a(n) _________ system.
Closed
Double-line drawings that show the internal details of a pneumatic system are called
Cutaway drawings
Vent lines and drain lines are shown on a hydraulic schematic by
Dashed lines
In an A/C and R system, thermostatic expansion valves and ADR valves are used on _________ control.
Direct
Arrows are used on piping diagrams to indicate the
Direction of flow
The composite symbol displayed includes the symbol for a(n)
Electric motor
On an electrical diagram, a dashed line indicates a(n)
Exposed wire
A wiring diagram shows how the parts of a circuit are connected
Externally
In the displayed diagram, the "FORWARD" button is marked
FOR
If the part is to be welded in the field, the weld symbol includes a(n)
Flag
The symbol displayed represents a
Gauge
Which kind of valve can be used to regulate the flow of fluid?
Globe
Which type of projection gives a three-dimensional view of a piping system?
Isometric
In the symbol below, which element designates the welding finish?
M
"Fusion" welding means joining two materials by __________ them together
Melting
In a DC circuit, the electrons flow from
One direction only
The displayed symbol represents a _________ in a _________ system.
Receiver; pneumatic
Which element of a hydraulic system keeps a vacuum from forming when the liquid level drops?
Reservoir
The basic method of fusion welding that uses the "squeeze-and-heat" process is _________ welding.
Resistance
What does the displayed symbol represent?
Rotary compressor
An electric circuit in which the current path goes from one load to the next is called a _________ circuit.
Series
What does the 2 represent when pipe and fitting sizes are indicated as follows?
Size of branch line
What does the 2 represent when pipe and fitting sizes are indicated as follows? 3" x 4" x2"
Size of branch line
In a piping system, an alternate flow pattern is indicated by a
Supplementary diagram
How is chamfering indicated in a welding symbol?
The symbol has the shape of the chamfer
Which type of diagram emphasizes connections between elements rather than flow?
Wiring
both hydraulic and pneumatic systems
are fluid power systems
A composite symbol is created by combining __________ symbols into a single symbol
basic
a composite symbol is created by combining________ symbols into a single symbol?
basic
Wires labeled " L " on a schematic?
carry power from the source
When compared to a pictorial representation of a system, a schematic is
easier to keep up-to-date
direction of flow in a piping system may be changed by an
elbow
if a schematic carries no legend, clues about it may be found in the parts list, drawing title, and?
engineer's notes
what is the last step in troubleshooting and electrical circuit when using a schematic?
examine the actual circuit
a wiring diagram shows how the parts of a circuit are connected?
externally
Which of the following weld types does not require chamfering?
fillet
The symbol shown below represents a
fixed-displacement compressor
the symbol shown below designates the valve is _______ operated
float
another name for a _______-way valve is a multiple-position valve.
four
The symbol below represents a __________ accumulator.
gas-charged
Standard dimensions for a weld
included in symbol is not correct answer
The downward pointing arrow in the symbol shown below represents a relief valve that
is normally closed
which type of projection gives a three-dimensional view of a piping system?
isometric
On a refrigeration wiring diagram, the field-wiring terminals are identified by
letters
on regfrigeration wiring diagram, the field-wiring terminals are identified by
letters
The refrigeration accessory symbol shown below represents a(n)
line filter
the refrigeration accerssory symbol shown below represents
line filter
a device that uses is electricity is called a
load
A schematic diagram may be broken into local areas to
make circuits easier to understand
One disadvantage of a welded joint is that it
may form slag inside the pipe
welding is classified by the?
method of producing the heat
when several wires follow the same path, they may be represented as a ___________ line on a wiring diagram.
one thick line may be used
both a fuse and circuit breaker
open a circuit when there is a current overload
A single-line drawing that uses simple outlines to represent components is a __________ diagram.
pictorial
a well prepared schematic begins with and returns to the
power source
The best starting point for tracing an electrical circuit is the
power supply
A thermistor's electrical resistance decreases as the
pressure increases
The pump in a hydraulic system
provides flow and pressure
On a refrigeration schematic, the following symbol indicates a switch that opens on
rising pressure
on a refrigeration schematic, the following symbol indicates a switch that opens on?
rising pressure
which type of diagram shows how the circuit functions?
schematic
which of the following is included in the five part definition of a schematic?
shows how a system works
which type of weld is designated by the symbol shown below?
spot
a schematic is made up of?
symbols and lines
A thermistor's electrical resistance decreases as the
temperature increases
what solid-state device in an A/C system can amplify and switch electrical signals?
transistor
a cock valve is used to
turn flow on or off quickly
which element of a hydraulic braking system directs the flow of the brake fluid?
valve
