NCCER ELECTRICAL MODULE 2 LEVEL 2 MOTORS: THEORY AND APPLICATION EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A

NCCER ELECTRICAL MODULE 2 LEVEL
2 MOTORS: THEORY AND APPLICATION
EXAM | QUESTIONS & ANSWERS
(VERIFIED) | LATEST UPDATE | GRADED
A+



How DC motors operate?

Correct Answer: Magnetic lines of force are continuous and always form closed

loops; Magnetic lines of force do not cross.



Armature: (Definition)

Correct Answer: The rotating windings of a DC motor.



The ____ is a movable electromagnet located between the poles of another fixed

permanent (field) magnet as shown.

Correct Answer: Armature



A twisting force called ______ must be developed. _____ is produced by mounting a

loop in a fixed magnetic field and as long as the fields of the magnet and armature

interact.

Correct Answer: Torque




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, Commentator: (Definition)

Correct Answer: A device used on electric motors or generators to maintain a

unidirectional current.



In the neutral plane, no ____ is produced and the rotation of the armature should stop

Correct Answer: Torque



A _____ is produced by the fields poles, and a loop of wire in the armature turns and

cuts this magnetic field.

Correct Answer: Magnetic field



CEMF

Correct Answer: Counter electromotive force (CEMF)



Horsepower: (Definition)

Correct Answer: The rated output capacity of the motor. It is based on breakdown

torque, which is the maximum torque a motor will develop without an abrupt drop in

speed.



Horsepower: (Equation)

Correct Answer: Hp= Watts/746




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