Motor Controls Unit 2
The circuit conductors between the final over current device and the outlet or equipment is ____ a-control circuit b-common control circuit c-branch circuit d-parallel circuit
C
Hand off Auto a-HOA b-HJO c-HAU
HOA
Push button a-PB c-SSW c-P d-N.O.
PB
safety switch a-SS b-SSW c-SAS d-SSP
SSW
The point at which an electrical component is connected to another electrical component is called ____ a-end point b-terminal c-clamping point d-torque setting
a terminal
which of the following items can be considered a manual control switch a-toggle switch b-safety switch c-drum switch d-all of these
all of these
Define control circuit
carries electrical signals directing the performance but doesn't carry the main power current
An electromechanical device used for repeatedly establishing and interrupting an electric power circuit is a ___ a-contactor b-control c-float switch d-combination starter
contractor
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-control circuit b-service c-feeder d-branch circuit
control circuit
a device used to supply reduced voltage to a control circuit is called a ___ a-motor control switch b-relay c-limit switch d-control circuit transformer
control circuit transformer
A flow switch is used to sense the height of a liquid a-true b-false
false
Control relays are used to switch large motor loads a-true b-false
false
Manual starters can be operated remotely a-true b-false
false
When a motor coil is de-energized a-the motor contracts stay closed b-gravity and spring tension open the mail contacts c-its held closed mechanically d-it must cool for a restart
gravity and spring tension open the main contacts
Which of the following would be considered a pilot control device a-motor starter b-contractor c-pressure switch d-VFD
pressure switch
a device operated by a change in one electrical circuit to control a device in the same circuit or another circuit is a a-pressure switch b-relay c-resistor d-transformer
relay
A manually operated switch that uses a rotating motion for actuating a device is called a ____ a-speed switch b-pressure switch c-safety switch d-selector switch
selector switch
A circuit in which all the components or contact symbols are connected end to end providing only one path for current to flow is called a _____ a-control circuit b-series circuit c-short circuit d-remote control curcuit
series
Auxiliary contracts should never be used to switch high voltages a-true b-false
true
