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 2RQ
DFMÂ stands for “design for manufacturing.” Why is it important for designers to interface with manufacturing as early as possible with the design phase?
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Gasoline ( p = 680 kg/m³ and v = 4.29 × 107 m²/s) is transported at a
rate of 240 L/s for a distance of 2 kilometre. The surface roughness of the
piping is 0.03 mm. If the head loss due to pipe friction is not to exceed 14 m,
determine the minimum diameter of the pipe using the third Swamee-Jain
formula. (Round the final answer to three decimal places.)
The minimum diameter of the pipe is 0.443
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1
Water at 15°C ( p = 999.1 kg/m³ and µ = 1.138 × 10¯¯³kg/m.s) is flowing
steadily in a 34-m-long and 6-cm-diameter horizontal pipe made of stainless
steel at a rate of 10 L/s. Determine the pressure drop, the head loss, and the
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of stainless steel is 0.002 mm.
eBook
Hint
10 L/s
6 cm
L
The pressure drop is
The head loss is
kPa.
|m. (Round the final answer to two decimal places.)
The pumping power requirement is
three decimal places.)
kW. (Round the final answer to
3
eBook
Hint
Air enters an 15-m-long section of a rectangular duct of cross section
15 cm x 20 cm made of commercial steel at 1 atm and 35°C at an average
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needed to overcome the pressure losses in this section of the duct. The
properties of air at 1 atm and 35°C are p = 1.145 kg/m³,
µ = 1.895 × 10−5 kg/m·s, and v = 1.655 × 10¯5m²/s. The roughness of
commercial steel surfaces is = 0.000045 m. (Round the final answer to
three decimal places.)
L
15 cm
Air
20 cm
5 m/s
The fan power needed to overcome the pressure losses is
4.0695 W.
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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