101 Basic Series - Module 19 - Post Assessment
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1
Double break contacts open and close the circuit in two places.
True
False
2
Contactors are used to make and break a circuit to a load.
True
False
3
hich is NOT a part of a eutectic overload relay?
Heater coil
Ratchet wheel
Eutectic alloy tube
Bimetallic strip
4
The speed that a motor is designed to run at is called _____ speed.
Asynchronous
Synchronous
Locked rotor
In-rush
5
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.
2-4
5
6-8
10
6
As contacts open and close an electrical arc is created which produces electrical heat.
True
False
7
A starter is a device that controls the use of electrical power, usually to a motor.
True
False
8
In-rush current doesn't cause much effect to circuit breakers or fuses on a motor circuit.
True
False
9
A heater coil converts excess current into ____ which is used to determine whether the motor is in danger.
Voltage
Heat
Reactance
Liquid
10
The heat surrounding a motor in its given environment is referred to as its _____ temperature.
Circulative
Diffusive
Dispersed
Ambient
11
Which circuit makes remote operation possible in a starter?
Power circuit
Control circuit
Short circuit
Shunt circuit
12
The control circuit directly operates the _____.
Line
Contactor
Motor
Overload relay
13
An overload relay provides protection with a current sensing unit in line with the motor, and a mechanism to break the circuit.
True
False
14
fter an overload, the bimetallic strip cools and reshapes itself resetting the contacts.
True
False
15
A solid state overload relay measures the amount of current or change in ____ to protect a motor from an overload.
Voltage
Resistance
Reactance
Conductance
16
A magnetic contactor can be operated remotely without human intervention.
True
False
17
This starter type connects the incoming power to the motor, in one direction at one speed, and is the most commonly used type.
Full voltage non-reversing
Full voltage reversing
Multi-speed
Reduced voltage
18
It is impossible to put too much load on a motor so that it will never reach its synchronous speed.
True
False
19
Ambient-compensated bimetallic elements are used to reduce the effects of environmental heat sensed by the overload relay.
True
False
20
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.
True
False
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