Motor Controls Test 1 (Units 1,2,3,&4)
Series circuit
A circuit in which all the components or contact symbols are connected end-to-end (as in a continuous loop), providing only one path for current flow is called a ___.
SSW
A common abbreviation for a safety switch is ___.
Relay
A device operated by a change in one electrical circuit to control a device in the same circuit or another circuit is a ___.
Control circuit transformer
A device used to supply reduced voltage to a control circuit is called a ___.
Selector switch
A manually operated switch that uses a rotating motion for actuating a device is called a ___.
switch
A motor control circuit, for the most part, is simply a ___ and a motor.
Toggle switch
A standard on-off wall-mounted snap switch used for most lighting outlets is an example of a ___.
Contactor
An electromechanical device used for repeatedly establishing and interrupting an electric power circuit is a ___.
Pressure switches, temperature switches, & time clocks
Automatic controls that can be used in a simple motor control arrangement include ___.
True
Connection diagrams are also called wiring diagrams.
False
Drum switches provide motor overload (OL) protection.
24V and 600V
For motor control applications, the relay coil voltages are typically rated between ___.
Motor will start when the power comes back on
If a toggle switch for a motor is closed and the power goes out, the ___.
True
In a magnetic motor starter, when the coil is energized, a normally open (NO) set of contacts will close, and a set of normally closed (NC) contacts will open.
True
In some cases, a general-use snap switch can be used as a disconnecting means for a motor rated 2 HP or less.
line diagrams and/or elementary diagrams
Ladder diagrams are also known as ___.
heat and current
Many types of overload protectors operate on the relationship between ___.
True
Schematics show motors and control equipment in their "resting" or "self" state.
True
Solenoid valves can be used with gases or liquids.
False
Switching devices such as float switches, limit switches, or relays always come with only one set of contacts.
Branch circuit
The circuit conductors between the final over current protective device and the outlet or equipment is a ___.
Control circuit
The circuit of a control apparatus or system that carries the electric signals directing the performance of the controller but doesn't carry the main power current is called a ___.
Terminal
The point at which an electrical component is connected to another electrical component is called a ___.
Toggle, safety, & drum switch
Which of the following items can be considered a manual control switch?
Pictorial diagrams
___ are used mostly in educational material and as exploded views or cut-away views in installation and maintenance literature.
Ladder diagrams
___ are used to represent the function of the control circuit and the associated devices, but don't show the components of the control circuit in their actual positions.
