
DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Textbook Question
Chapter 10, Problem 9RQ
What is the difference between accuracy and precision?
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A 10-kg box is pulled along P,Na rough surface by a force P, as shown in thefigure. The pulling force linearly increaseswith time, while the particle is motionless att = 0s untilit reaches a maximum force of100 Nattimet = 4s. If the ground has staticand kinetic friction coefficients of u, = 0.6 andHU, = 0.4 respectively, determine the velocityof the
A
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kg box is pulled along P
,
N
a rough surface by a force P
,
as shown in the
figure. The pulling force linearly increases
with time, while the particle is motionless at
t
=
0
s untilit reaches a maximum force of
1
0
0
Nattimet
=
4
s
.
If the ground has static
and kinetic friction coefficients of u
,
=
0
.
6
and
HU
,
=
0
.
4
respectively, determine the velocity
of the particle att
=
4
s
.
Calculate the speed of the driven member with the following conditions:
Diameter of the motor pulley: 4 in Diameter of the driven pulley: 12 in Speed of the motor pulley: 1800 rpm
4. In the figure, shaft A made of AISI 1010 hot-rolled steel, is welded to a fixed
support and is subjected to loading by equal and opposite Forces F via shaft B.
Stress concentration factors K₁ (1.7) and Kts (1.6) are induced by the 3mm fillet.
Notch sensitivities are q₁=0.9 and qts=1. The length of shaft A from the fixed
support to the connection at shaft B is 1m. The load F cycles from 0.5 to 2kN and
a static load P is 100N. For shaft A, find the factor of safety (for infinite life) using
the modified Goodman fatigue failure criterion.
3 mm
fillet
Shaft A
20 mm
25 mm
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25 mm
Chapter 10 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 10 - What are some of the advantages to the consumer of...Ch. 10 - DFMÂ stands for design for manufacturing. Why is...Ch. 10 - Explain the difference between attributes and...Ch. 10 - Prob. 4RQCh. 10 - What are the four basic measures upon which all...Ch. 10 - What are gage blocks?Ch. 10 - Why do gage blocks come in sets?Ch. 10 - Prob. 8RQCh. 10 - What is the difference between accuracy and...Ch. 10 - What is the difference between tolerance and...
Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Why might you use a shrink fit to join the wheels...Ch. 10 - Explain the difference between repeatability and...Ch. 10 - When measuring time, is it more important to be...Ch. 10 - Prob. 16RQCh. 10 - What factors should be considered in selecting...Ch. 10 - Prob. 18RQCh. 10 - What is parallax? (Why do linesmen in tennis sit...Ch. 10 - Explain the rule of 10 in terms of tolerances.Ch. 10 - How does the vernier caliper work to make...Ch. 10 - What are the two most likely sources of error in...Ch. 10 - What is the major disadvantage of a micrometer...Ch. 10 - What is the main advantage of a micrometer over...Ch. 10 - What is the major difficulty in obtaining an...Ch. 10 - Why is the toolmakers microscope particularly...Ch. 10 - What are the ways that linear measurements can be...Ch. 10 - What type of instrument would you select for...Ch. 10 - What are the chief disadvantages of using a vision...Ch. 10 - What is a CMM (coordinate measuring machine)?Ch. 10 - Prob. 31RQCh. 10 - How can the no�go member of a plug gage be...Ch. 10 - What is the primary precaution that should be...Ch. 10 - What tolerances are added to gages when they are...Ch. 10 - Explain how a go/no�go ring gage works to check...Ch. 10 - Why are air gages particularly well suited for...Ch. 10 - Explain the principle of measurement by...Ch. 10 - How does a toolmakers flat differ from an optical...Ch. 10 - Prob. 1PCh. 10 - Read the 25�division vernier graduated in metric...Ch. 10 - In Figure 10.C , the sleeve�thimble region of...Ch. 10 - Suppose that in Figure 10.31 the height of the...Ch. 10 - What is the estimated error in this measurement,...Ch. 10 - Figure 10.D shows the sleeve�thimble region of...Ch. 10 - In Figure 10.E , two examples of a metric...Ch. 10 - Prob. 8PCh. 10 - Figure 10.F shows a section of a vernier...Ch. 10 - Here is a table that provides a description of...
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