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What is a controller?
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What is a Controllers functions?
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Unit 1

General Principles Of Electric Motor Control

QuestionAnswer
What is a controller? A CONTROLLER is a device or group of devices that governs, in a predetermined manner, the delivery if electric power to apparatus connected to it.
What is a Controllers functions? To start, stop, reverse and protect a motor.
What is meant by remote control? Allowed to control a device without a remote location.
List at least 4 devices that are used to control a motor automatically. Describe each device. Float Switch Pressure Switch Time Clock Thermo Switch Limit Switch
The general purpose of motor control is: a. to start the motor b. to stop the motor c. to reverse the motor d. all of the above d. all of the above
A motor may be controlled manually by using a: a. float switch b. pressure switch c. toggle switch d. time clock c. toggle switch
A motor may be controlled remotely or automatically by using a: a. drum controller b. thermostat c. safety switch d. faceplate control b. thermostat
Conditions that may affect starting and stopping of a motor and the machinery that it drives are: a. fast or slow starts b. starting under light or heavy loads c. how often the motor is started and stopped d. all of the above d. all of the above
Which of the following is not considered as motor speed control? a. constant speed b. varying speed c. multispeed d. short-circuit protection d. short-circuit protection
Which of the following is not a protective feature of a motor controller? a. overload b. short circuit c. adjustable speed d. mechanical b. short circuit
Which function is not a fundamental job of a motor controller? a. start and stop the motor b. protect the motor, machine, and operator c. reverse, inch, job, speed control d. motor and controller disconnect switch d. motor and controller disconnect switch
what factors are to be considered when selecting and installing a controller? a. electrical service b. motor c. electrical codes and standards d. all of the above d. all of the above
Created by: aganotisi
 

 



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