24.a. What type of drive is needed for a vertical lift bridge using two induction motors to operate the two ends of the bridge at the same time? A. Synchrotie drive B. Adjustable voltage drive C. Eddy-current coupling D. Adjustable frequency drive 24.b. To prevent the motor speed from increasing until the motor fails mechanically, a load should always be connected to a A. shunt d-c motor. B. series d-c motor. C. wound-rotor motor D. synchronous motor
24.a. What type of drive is needed for a vertical lift bridge using two induction motors to operate the two ends of the bridge at the same time? A. Synchrotie drive B. Adjustable voltage drive C. Eddy-current coupling D. Adjustable frequency drive 24.b. To prevent the motor speed from increasing until the motor fails mechanically, a load should always be connected to a A. shunt d-c motor. B. series d-c motor. C. wound-rotor motor D. synchronous motor
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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24.a. What type of drive is needed for a vertical lift bridge using two induction motors to operate the two
ends of the bridge at the same time?
A. Synchrotie drive
B. Adjustable voltage drive
C. Eddy-current coupling
D. Adjustable frequency drive
24.b. To prevent the motor speed from increasing until the motor fails
connected to a
A. shunt d-c motor.
B. series d-c motor.
C. wound-rotor motor
D. synchronous motor
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