Understanding Motor Controls
3rd Edition
ISBN: 9781305498129
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 2, Problem 1RQ
To determine
The name of the symbol from the given options.
Expert Solution & Answer
Explanation of Solution
The symbol shown in Figure 1 is used in a schematic of control circuits to designate normally open contact.
Two parallel horizontal lines or vertical lines are used to indicate a normally open contact. The normally open contact in a circuit schematic depicts that the circuit is open and no current flow is present.
Thus, the correct answer is “option d. Normally open contact”.
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Chapter 2 Solutions
Understanding Motor Controls
Ch. 2 - Prob. 1RQCh. 2 - The symbol shown is:
Normally closed float...Ch. 2 - The symbol shown is: a. Iron core transformer b....Ch. 2 - The symbol shown is:
Normally open pressure...Ch. 2 - The symbol shown is: a. Double acting push button...Ch. 2 - If you were installing the circuit in Figure 233,...Ch. 2 - Referring to the circuit in Figure 2–33, should...Ch. 2 - Prob. 8RQCh. 2 - Prob. 9RQCh. 2 - When reading a schematic diagram, are the control...
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