Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 6, Problem 4SQ
Select the best answer for each of the following.
A single-break control is a
a. heavy-duty selector switch.
b. single-circuit push button.
c. standard-duty selector switch.
d. double-circuit push button.
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7. Which statement is true for the process-control relay ladder diagram shown in the figure?
A. The pressure switch, temperature switch, and push button must be closed for the motor to start.
B. With the temperature switch closed, the motor will start once the push button is pressed.
C. With the pressure switch closed and the push button released, the motor will start.
D. Only the temperature switch has to close for the motor to start.
Chapter 16
1. When adding an XOX timing code to a load, is the load on during the timing period?
2. When connecting the input switch that control a timer, what is the advantage of using a contact-controlled timer instead of a supply voltage-controlled timer?
What would be the purpose of wiring two normally open start buttons in series rather than parallel?
Chapter 6 Solutions
Electric Motor Control
Ch. 6 - What is meant by normally open contacts and...Ch. 6 - Why is it that normally open and normally closed...Ch. 6 - How are colored pilot lights indicated in wiring...Ch. 6 - Select the best answer for each of the following....Ch. 6 - Select the best answer for each of the following....Ch. 6 - Select the best answer for each of the following....Ch. 6 - Select the best answer for each of the following....Ch. 6 - Select the best answer for each of the following....Ch. 6 - Select the best answer for each of the following....Ch. 6 - Select the best answer for each of the following....
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