NCCER ELECTRICAL MODULE 2 LEVEL 2 MOTORS: THEORY AND APPLICATION 2024 QUESTIONS WITH CORRECT ANSWERS ALREADY PASSED AND VERIFIED
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NCCER ELECTRICAL MODULE 2 LEVEL 2 MOTORS
Institution
NCCER ELECTRICAL MODULE 2 LEVEL 2 MOTORS
NCCER ELECTRICAL MODULE 2 LEVEL 2
MOTORS: THEORY AND APPLICATION 2024
QUESTIONS WITH CORRECT ANSWERS ALREADY
PASSED AND VERIFIED
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: (De...
NCCER ELECTRICAL MODULE 2 LEVEL 2 MOTORS: THEORY AND APPLICATION 2024 QUESTIONS WITH CORRECT ANSWERS ALREADY PASSED AND VERIFIED 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 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) NCCER ELECTRICAL MODULE 2 LEVEL 2 MOTORS: THEORY AND APPLICATION 2024 QUESTIONS WITH CORRECT ANSWERS ALREADY PASSED AND VERIFIED 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 Types of DC motors - CORRECT ANSWER Shunt Series Compound Types of AC motors - CORRECT ANSWER Synchronous and Induction (Single and Polyphase) Periodic duty: (Definition) - CORRECT ANSWER Intermittent operation at a substantially constant load for a short and definitely specified time. Revolutions per minute (rpm): (Definition) - CORRECT ANSWER The approximate full-load speed at the rated power line frequency. The speed of a motor is determined by the number of poles in the winding. Rotation: (Definition) - CORRECT ANSWER For single -phase motors, the standard rotation, unless otherwise noted, is counterclockwise facing the lead or opposite shaft end. All motors can be reconnected at the terminal board for opposite rotation unle ss other wise indicated.
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