6 questions Intermediate

ECADEMY test

106L - Electromagnetic Motors

This course test contains 6 questions and can be retaken at any time.

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Question 1 of 6 Intermediate

In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?

Question 2 of 6 Intermediate

Which of the following electrical devices is most commonly used to start a single-phase motor?

Question 3 of 6 Intermediate

An induction motor will operate at synchronous speed at full load?

Question 4 of 6 Intermediate

Which of the following is the synchronous speed for a four-pole 60Hz induction motor?

Question 6 of 6 Intermediate

A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?

Question 6 of 6 Intermediate

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Correct
Q: In a two-pole induction motor, the stator flux rotates at 3,600 rpm. Which of the following would be a typical rotor speed for this motor?
A: 3,500 rpm.
Correct
Q: Which of the following electrical devices is most commonly used to start a single-phase motor?
A: Capacitor
Correct
Q: An induction motor will operate at synchronous speed at full load?
A: False
Correct
Q: Which of the following is the synchronous speed for a four-pole 60Hz induction motor?
A: 1,800 rpm
Correct
Q: Which of the following single-phase motors offers the lowest starting torque?
A: Permanent-split capacitor (PSC)
Correct
Q: A magnetic field is created around an electrical conductor when an electric current is passed through it. This is known as what?
A: Electromagnetism