Machine Tool Practices
11th Edition
ISBN: 9780134985848
Author: Richard R. Kibbe; Roland O. Meyer; Jon Stenerson; Kelly Curran
Publisher: Pearson Education (US)
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Chapter A.4, Problem 9ST
Explain two reasons why flat washers are used.
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A prototype automobile is designed to travel at 65 km/hr. A model of this design is tested in a wind tunnel with identical standard sea-
level air properties at a 1:5 scale. The measured model drag is 529 N, enforcing dynamic similarity. Determine (a) the drag force on the
prototype and (b) the power required to overcome this drag. See the equation
Vm
m
=
D
V Dm
(a) Dp = i
(b) Pp = i
N
hp
A new blimp will move at 6 m/s in 20°C air, and we want to predict the drag force. Using a 1: 14-scale model in water at 20°C and
measuring a 2500-N drag force on the model, determine (a) the required water velocity, (b) the drag on the prototype blimp and, (c) the
power that will be required to propel it through the air.
(a) Vm = i
(b) Dp = i
(c) Pp = i
m/s
N
W
Drag measurements were taken for a sphere, with a diameter of 5 cm, moving at 3.7 m/s in water at 20°C. The resulting drag on the
sphere was 10 N. For a balloon with 1-m diameter rising in air with standard temperature and pressure, determine (a) the velocity if
Reynolds number similarity is enforced and (b) the drag force if the drag coefficient in the equation below is the dependent pi term.
li ε pVI
D
1
= CD = Q
μ
(a) Vp = i
(b) Dp = i
m/s
N
Chapter A Solutions
Machine Tool Practices
Ch. A.1 - Prob. 1STCh. A.1 - Prob. 2STCh. A.1 - Companies are looking for people with good...Ch. A.1 - Prob. 4STCh. A.1 - Prob. 5STCh. A.1 - Prob. 6STCh. A.1 - Prob. 7STCh. A.1 - Prob. 8STCh. A.2 - Prob. 1STCh. A.2 - Prob. 2ST
Ch. A.2 - Prob. 3STCh. A.2 - Prob. 4STCh. A.2 - Prob. 5STCh. A.2 - Prob. 6STCh. A.2 - Prob. 7STCh. A.3 - What is the primary piece of safety equipment in...Ch. A.3 - Prob. 2STCh. A.3 - Prob. 3STCh. A.3 - Prob. 4STCh. A.3 - What hazards exist from coolants, oils, and...Ch. A.3 - Prob. 6STCh. A.3 - Prob. 7STCh. A.3 - Prob. 8STCh. A.3 - Prob. 9STCh. A.3 - Prob. 10STCh. A.3 - Prob. 11STCh. A.4 - Define the term pitch diameter.Ch. A.4 - Name two ways to measure a thread.Ch. A.4 - What is the rule of thumb for the length of...Ch. A.4 - Describe when class two fits are used.Ch. A.4 - Describe UNC and UNF.Ch. A.4 - What is the formula for calculating the OD of a...Ch. A.4 - When are stud bolts used?Ch. A.4 - Prob. 8STCh. A.4 - Explain two reasons why flat washers are used.Ch. A.4 - What is the purpose of a helical spring lock...Ch. A.4 - When is an internal-external tooth lock washer...Ch. A.4 - When are dowel pins used?Ch. A.4 - When are taper pins used?Ch. A.4 - When are roll pins used?Ch. A.4 - What are retaining lings?Ch. A.4 - Prob. 16STCh. A.4 - Prob. 17STCh. A.4 - Prob. 18STCh. A.5 - Prob. 1STCh. A.5 - Prob. 2STCh. A.5 - Prob. 3STCh. A.5 - Prob. 4STCh. A.5 - Prob. 5STCh. A.5 - Prob. 6STCh. A.6 - Prob. 1STCh. A.6 - Prob. 2STCh. A.6 - Prob. 3STCh. A.6 - Prob. 4STCh. A.6 - Prob. 5STCh. A.6 - Prob. 6STCh. A.6 - Prob. 7STCh. A.6 - Prob. 8STCh. A.6 - Prob. 9STCh. A.6 - Prob. 10STCh. A.7 - Prob. 1STCh. A.7 - Prob. 2STCh. A.7 - Prob. 3STCh. A.7 - Prob. 4STCh. A.7 - Prob. 5STCh. A.7 - Prob. 6STCh. A.7 - Prob. 7STCh. A.7 - Prob. 8STCh. A.7 - Prob. 9STCh. A.7 - Prob. 10STCh. A.8 - Prob. 1STCh. A.8 - Prob. 2STCh. A.8 - Prob. 3STCh. A.8 - Prob. 4STCh. A.8 - Prob. 5STCh. A.8 - Prob. 6STCh. A.8 - Prob. 7STCh. A.8 - Prob. 8STCh. A.8 - Prob. 9STCh. A.8 - Prob. 10STCh. A.8 - Prob. 11STCh. A.9 - Prob. 1.1QCCh. A.9 - Prob. 1.2QCCh. A.9 - Prob. 1.3QCCh. A.9 - Prob. 1.4QCCh. A.9 - Prob. 1.5QCCh. A.9 - Prob. 1.6QCCh. A.9 - Prob. 2.1QCCh. A.9 - Prob. 2.2QCCh. A.9 - Prob. 3.1QCCh. A.9 - Prob. 3.2QCCh. A.9 - Prob. 4.1QCCh. A.9 - Prob. 4.2QCCh. A.9 - Prob. 4.3QCCh. A.9 - Prob. 1STCh. A.9 - Prob. 2STCh. A.9 - Prob. 3STCh. A.9 - Prob. 4STCh. A.9 - Prob. 5STCh. A.9 - Prob. 6ST
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