101 Basic Series - Module 19 - CEU Education
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1
In-rush current doesn't cause much effect to circuit breakers or fuses on a motor circuit.
2
A magnetic contactor can be operated remotely without human intervention.
3
When the coil of a magnetic contactor is de-energized, the magnetic field is broken and the spring forces the contacts apart breaking the circuit.
4
Which circuit makes remote operation possible in a starter?
5
hich is NOT a part of a eutectic overload relay?
6
fter an overload, the bimetallic strip cools and reshapes itself resetting the contacts.
7
A solid state overload relay measures the amount of current or change in ____ to protect a motor from an overload.
8
The speed that a motor is designed to run at is called _____ speed.
9
Double break contacts open and close the circuit in two places.
10
A heater coil converts excess current into ____ which is used to determine whether the motor is in danger.
11
It is impossible to put too much load on a motor so that it will never reach its synchronous speed.
12
The heat surrounding a motor in its given environment is referred to as its _____ temperature.
13
In-rush current is the amount of current drawn when a motor is first starting up. This can be ______ times the normal running current draw.
14
As contacts open and close an electrical arc is created which produces electrical heat.
15
Ambient-compensated bimetallic elements are used to reduce the effects of environmental heat sensed by the overload relay.
16
The control circuit directly operates the _____.
17
A starter is a device that controls the use of electrical power, usually to a motor.
18
Contactors are used to make and break a circuit to a load.
19
An overload relay provides protection with a current sensing unit in line with the motor, and a mechanism to break the circuit.
20
This starter type connects the incoming power to the motor, in one direction at one speed, and is the most commonly used type.
 
   



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