What are contactors usually rated to switch current to?

Control devices

Quiz
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Education
•
University
•
Medium
Azamat Bagitkaliyev
Used 1+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Computers and servers
Motors, lights and heaters
Televisions and radios
Refrigerators and air conditioners
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is true about NEMA designed contactors?
They are not serviceable
They are prevalent in non-US markets
They are only UL listed and rated
They are inherently touch safe
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is true about IEC designed contactors?
They are serviceable in lower HP ratings
They are prevalent in enclosed starters and motor control centers (MCC)
They are comparatively smaller than NEMA contactors
They have six application choices from fractional to 400HP (480V)
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What does a Combination starter consist of?
A MSP and a relay
A MSP and a contactor
A contactor and a relay
A relay and a circuit breaker
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the primary function of a soft starter in a motor?
To vary the speed of the motor
To provide a reduced voltage motor start
To increase the inrush current
To provide branch circuit protection
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In which scenario might a soft starter be used for a reduced torque motor start?
In a high-speed train where a sudden start could cause discomfort to passengers
In a computer fan where a sudden start could cause a system crash
In a wind turbine where a sudden start could cause structural damage
In a bottling conveyor where a sudden start or stop could damage the bottles
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
When are Variable Frequency Drives (VFDs) typically used?
When the speed of the motor needs to be constant
When the speed of the motor needs to be varied
When the motor needs to be stopped
When the motor needs to be started
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