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MindTap for Herman's Understanding Motor Controls, 4th Edition [Instant Access], 2 terms
4th Edition
ISBN: 9781337798754
Author: Herman; Stephen L.
Publisher: Cengage Learning US
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Textbook Question
Chapter 12, Problem 1RQ
What is the purpose of sequence control?
Expert Solution & Answer
To determine
Identify the purpose of sequence control.
Explanation of Solution
The purpose of sequence control is to maintain the predetermined order at which the motors are forced to start or stop. One motor cannot start unit its predecessor is in operation.
Machines that have high pressure pump operation like the hydraulic press or systems that requires a blower to be in operation before stating the compressor like the air-conditioning systems use the sequence control.
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Students have asked these similar questions
12 mm
45 mm
20 kN
20 kN
12 mm
45 mm
PROBLEM 1.61
For the assembly and loading of Problem 1.60, determine (a) the
average shearing stress in the pin at C, (b) the average bearing stress at
C in member BC, (c) the average bearing stress at B in member BC.
PROBLEM 1.60 Two horizontal 20-kN forces are applied to pin B of
the assembly shown. Knowing that a pin of 20-mm diameter is used at
each connection, determine the maximum value of the average normal
stress (a) in link AB, (b) in link BC.
How do you find these answers?
250 mm
400 mm
A
B
C
E
F
250 mm
PROBLEM 1.52
Each of the two vertical links CF connecting the two horizontal
members AD and EG has a 10 × 40-mm uniform rectangular cross
section and is made of a steel with an ultimate strength in tension of
400 MPa, while each of the pins at C and F has a 20-mm diameter and
are made of a steel with an ultimate strength in shear of 150 MPa.
Determine the overall factor of safety for the links CF and the pins
connecting them to the horizontal members.
24 kN
Chapter 12 Solutions
MindTap for Herman's Understanding Motor Controls, 4th Edition [Instant Access], 2 terms
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