Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 42, Problem 2RQ
Why did the development of iron and steel promote the development of the factory?
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motor supplies 200 kW at 6 Hz to flange A of the shaft shown in Figure. Gear B transfers 125 W of power to operating machinery in the factory, and the remaining power in the shaft is mansferred by gear D. Shafts (1) and (2) are solid aluminum (G = 28 GPa) shafts that have the same diameter and an allowable shear stress of t= 40 MPa. Shaft (3) is a solid steel (G = 80 GPa) shaft with an allowable shear stress of t = 55 MPa. Determine:
a) the minimum permissible diameter for aluminum shafts (1) and (2)
b) the minimum permissible diameter for steel shaft (3).
c) the rotation angle of gear D with respect to flange A if the shafts have the minimum permissible diameters as determined in (a) and (b).
First monthly exam
Gas dynamics
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Q1/Water at 15° C flow through a 300 mm diameter riveted steel pipe, E-3 mm with a head loss of 6 m in
300 m length. Determine the flow rate in pipe. Use moody chart.
Q2/ Assume a car's exhaust system can be approximated as 14 ft long and 0.125 ft-diameter cast-iron pipe (
= 0.00085 ft) with the equivalent of (6) regular 90° flanged elbows (KL = 0.3) and a muffler. The
muffler acts as a resistor with a loss coefficient of KL= 8.5. Determine the pressure at the beginning of the
exhaust system (pl) if the flowrate is 0.10 cfs, and the exhaust has the same properties as air.(p = 1.74 ×
10-3 slug/ft³, u= 4.7 x 10-7 lb.s/ft²) Use moody chart
(1)
MIDAS
Kel=0.3
Q3/Liquid ammonia at -20°C is flowing through a 30 m long section of a 5 mm diameter copper tube(e =
1.5 × 10-6 m) at a rate of 0.15 kg/s. Determine the pressure drop and the head losses.
.μ= 2.36 × 10-4 kg/m.s)p = 665.1 kg/m³
Chapter 42 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 42 - How is the lean engineers job different from the...Ch. 42 - Why did the development of iron and steel promote...Ch. 42 - How mass-production system differ from the lean...Ch. 42 - Who might have the best ideas about how to improve...Ch. 42 - Who should be tasked with sustaining and...Ch. 42 - Describe the difference between leveling and...Ch. 42 - Describe the difference between sequencing and...Ch. 42 - Prob. 8RQCh. 42 - How do you get from the factory design shown in...Ch. 42 - Many companies build and customize their...
Ch. 42 - Give a detailed discussion of the TSS and how it...Ch. 42 - What are the lean engineering tasks for...Ch. 42 - Prob. 13RQCh. 42 - Prob. 14RQCh. 42 - What is the fundamental difference between how...Ch. 42 - How is the rabbit chase used in an assembly cell?...Ch. 42 - How is production control accomplished in lean...Ch. 42 - In Figure 42.13, there are decouplers between each...Ch. 42 - Many lean manufacturing cells have no decouplers....Ch. 42 - The automobile has about 5000 parts. How many...Ch. 42 - Prob. 3PCh. 42 - Prob. 4PCh. 42 - Calculate the cycle time for the cell. It should...Ch. 42 - Prob. 2CSCh. 42 - Prob. 3CS
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