Nate Core Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Nate Core Test with flashcards and multiple choice questions. Each question includes hints and explanations to ensure you are well-prepared. Boost your confidence and enhance your readiness for the exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the synchronous speed of a four-pole motor operating at a frequency of 60 Hz?

900 rpm
1200 rpm
1800 rpm
3600 rpm

The correct answer is: 1800 rpm

To determine the synchronous speed of an electric motor, you can use the formula: Synchronous Speed (RPM) = (120 × Frequency) / Number of Poles In this case, the motor has four poles and is operating at a frequency of 60 Hz. Plugging these values into the formula gives: Synchronous Speed = (120 × 60) / 4 Calculating that results in: Synchronous Speed = 7200 / 4 = 1800 RPM This means that the motor will rotate at a speed of 1800 revolutions per minute when it operates synchronously. Therefore, the correct answer reflects this calculation, confirming that the synchronous speed for a four-pole motor at 60 Hz is indeed 1800 rpm, indicating the motor's theoretical maximum speed under synchronous operation conditions.