Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 15, Problem 2SQ
To determine
State the probable cause for the leakage in an electrically controlled, two-way solenoid value.
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Electric Motor Control
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- 18. A suitable disconnecting means for a fixed appliance is a A. pigtail cord. B.light switch that interrupts the hot wire. C. circuit breaker. D. two-pole switch that interrupts the common wire.arrow_forwardWhat special tools, not ordinarily carried by an electrician, are required to align a directly coupled, motor-generator setarrow_forwardWhat precautions must be utilized and maintained when setting up or using a Delata 4 wire system that is to serve both 240 V and 120 V single phase loads?arrow_forward
- 12.a. An electrical device would also fall into the classification of an electric(al)A. motor.B. load.C. component.D. fitting.12.b. A short circuit describes the condition where there's contact between theA. hot wire and the neutral wire.B. grounded conductor and the grounding wire.C. hot wire and the grounding wire.D. neutral wire and the grounded conductor.arrow_forward8.a. Which of the following most accurately describes the difference between a contactor and a starter?A. A starter contains a contactor and some additional protective circuitry.B. A starter is always mounted in an enclosure.C. A starter contains reversing contacts.D. A starter is always three-phase while a contactor may be single-phase or three-phase.8.b. The main bus in a motor control center is used toA. reduce the possibility of overload with large loads.B. enclose motors within a protective shield.C. distribute power to all starters in the center.D. reduce the voltage of the plant's supply.arrow_forwardWhat does the electrician look for to remedy the following conditions: a. loud or noisy hum? b. chatter?arrow_forward
- A 4/2 directional control valve operated by a solenoid will be replaced in the circuit. Define the purpose and function of the indirect actuation to the electrical circuit that would be used for operating the solenoid valve.arrow_forwardIn the event of line voltage fluctuations or failure, how is the starter maintained in a closed position?arrow_forwardWhere is the jet of the pump located? ________________arrow_forward
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