8.A. One characteristic of a typical universal motor is that it A. is usually designed for low-speed operation. B. has a low locked-rotor torque. C. operates at about the same speed on a-c and doc circuits. 8.B. A centrifugal starting switch in a split-phase motor operates on the principle that A. a high starting current opens the switch contacts. B. a higher speed changes the shape of a disk to open the switch contacts. C. the actuating weights move outward as the motor slows down.
8.A. One characteristic of a typical universal motor is that it A. is usually designed for low-speed operation. B. has a low locked-rotor torque. C. operates at about the same speed on a-c and doc circuits. 8.B. A centrifugal starting switch in a split-phase motor operates on the principle that A. a high starting current opens the switch contacts. B. a higher speed changes the shape of a disk to open the switch contacts. C. the actuating weights move outward as the motor slows down.
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 6RQ: Name three factors that determine the torque produced by an induction motor.
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8.A. One characteristic of a typical universal motor is that it
A. is usually designed for low-speed operation.
B. has a low locked-rotor torque.
C. operates at about the same speed on a-c and doc circuits.
8.B. A centrifugal starting switch in a split-phase motor operates on the principle that
A. a high starting current opens the switch contacts.
B. a higher speed changes the shape of a disk to open the switch contacts.
C. the actuating weights move outward as the motor slows down.
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