WorksheetsMotor Protection Quiz
Total questions: 8
Worksheet time: 8mins
Name
Class
Date
1.
What is the main purpose of motor protection systems?
a)
To prevent electrical faults
b)
To enhance motor speed
c)
To minimise fire risk and motor damage
d)
To reduce motor noise
2.
Which device needs to be replaced after it breaks due to high current?
a)
Circuit breaker
b)
Thermal relay
c)
Fuse
d)
Motor temperature sensor
3.
Which device can be reset and does not need replacement after tripping?
a)
Fuse
b)
Circuit breaker
c)
Motor temperature sensor
d)
Thermal relay
4.
Which device uses thermistors to detect high temperatures in motors?
a)
Circuit breaker
b)
Fuse
c)
Thermal relay
d)
Motor temperature sensor
5.
What is the function of a contactor in motor protection systems?
a)
To disconnect the load directly
b)
To sense temperature
c)
To turn the motor on and off
d)
To melt and break under high current
6.
How can thermal circuit breakers be reset?
a)
By replacing them
b)
By turning the switch from 'tripped' to 'on'
c)
By pressing a 'reset' button only
d)
Both automatically and manually
7.
Which motor protection device contains load current sensors and a switch?
a)
Fuse
b)
Circuit breaker
c)
Motor temperature sensor
d)
Thermal relay
8.
What describes failsafe operation in motor protection systems?
a)
The system remains operational, even if there is a partial failure
b)
If there is any sort of failure within the system, it shuts down
c)
The system is safe because it is resistant to failure
d)
The system is safe because it is prone to failure
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