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Exam (elaborations)

NCCER Electrical Level 3 Mod 9 Questions with Correct Answers | Rated A+

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NCCER Electrical Level 3 Mod 9 Questions with Correct Answers | Rated A+

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Institution
Electrical Level 3
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Electrical Level 3

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Uploaded on
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2024/2025
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  • nccer electrical level 3 mod 9 questions with corr

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NCCER Electrical Level 3 Mod 9 Questions
with Correct Answers | Rated A+
3 basic types of 3ø motors - CORRECT ANSWER -Synchronous motor

Wound rotor induction

Squirrel cage induction



3 factors that cause the magnetic field to rotate - CORRECT ANSWER -The voltages of a 3ø
electrical system are 120° out of phase with one another



The three voltages change polarity at regular intervals



The stator windings around the inside of the motor are arranged in a specific manner to induced
rotation



They sync speed of 3 phase motor is based on 2 factors - CORRECT ANSWER -Number of stator
poles

Frequency of the ac line in hertz



The formula for sync speed is - CORRECT ANSWER -120F divided by P



F= - CORRECT ANSWER -Frequency



P= - CORRECT ANSWER -Number of poles



When a motor is operated at 240 volts the current draw of the motor is ___ the current draw of
a 480 volt connection - CORRECT ANSWER -Double
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