Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 17, Problem 11RQ
A PTC device is used
A. to start a hermetic compressor.
B. as a motor protector.
C. to protect against low oil pressure.
D. to protect against high oil temperature.
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A bent pipe is attached to a wall with brackets as shown. A
force of F = 180 lb is applied to the end of the tube with
direction indicated by the dimensions in the figure.
Determine the support reactions at the brackets B, C, and
D. Model these brackets as journal bearings (only force
reactions perpendicular to the axis of the tube) and neglect
couple moment reactions. Assume the distance between the
supports at B and C and the tube bends nearby are
negligible such that the support at C is directly above the
support at D and the dimension g gives the distance between
supports B and C. Enter your answers in Cartesian
components.
2013 Michael Swanbom
cc 10
BY NC SA
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Values for dimensions on the figure are given in the table
below. Note the figure may not be to scale.
Variable Value
a
6.72 in
b
11.8 in
с
14.8 in
d
42.0 in
h
26.6 in
g
28.0 in
→
The reaction at B is B =
lb.
The reaction at C is C =
lb.
The reaction at D is D =
lb.
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The force F1 = 10 kN, F2 = 10 kN, F3 = 10 kN, F4 = 5
KN are acting on the sttructure shown. Determine the forces
in the members specified below. Use positive values to
indicate tension and negative values to indicate compression.
F2
D
b
F1
F3 C
E
b
F4
b
B
F
a
G
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
3 m
b
4 m
The force in member BC is
KN.
The force in member BE is
KN.
The force in member EF is
KN.
h
=
The transmission tower is subjected to the forces F₁ 3.6
KN at 50° and F2 = 3.3 kN at = 35°. Determine the
forces in members BC, BP, PQ, PC, CD, DP and NP.
Use positive values to indicate tension and negative values to
indicate compression.
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N
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d
d
IF, c
B
CENTER
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F₂
Kbb
cc 10
BY NC SA
2013 Michael Swanbom
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable
Value
a
1.7 m
b
4.9 m
с
3 m
d
5.2 m
h
8.4 m
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
1.7 m
4.9 m
с
3 m
d
5.2 m
h
8.4 m
The force in member BC is
KN.
The force in member BP is
KN.
The force in member PQ is
KN.
The force in member PC is
KN.
The force in member CD is
KN.
The force in member DP is
KN.
The force in member NP is
KN.
Chapter 17 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 17 - The two popular operating voltages for residences...Ch. 17 - Prob. 2RQCh. 17 - Is the resistance in the start winding greater or...Ch. 17 - Which of the following devices may be wired into...Ch. 17 - Prob. 5RQCh. 17 - Define BEME.Ch. 17 - Why is the hermetic compressor motor manufactured...Ch. 17 - The two types of motors used for hermetic...Ch. 17 - How does power pass through the compressor shell...Ch. 17 - The two types of relays used to start hermetic...
Ch. 17 - A PTC device is used A. to start a hermetic...Ch. 17 - True or False: Three-phase motors have low...Ch. 17 - Prob. 13RQCh. 17 - Why is it desirable to have a two-speed...Ch. 17 - True or False: All electric motors must be cooled...Ch. 17 - True or False: An SCR is an electronic switch.Ch. 17 - Prob. 17RQCh. 17 - Capacitors are used after the converter to A....Ch. 17 - The converter A. changes the frequency of the...Ch. 17 - The inverter A. adjusts the frequency. B. adjusts...Ch. 17 - Briefly describe the operation of the three...
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- HELP?arrow_forwardTrue and False Indicate if each statement is true or false. T/F 1. Rule #1 protects the function of assembly. T/F 2. One of the fundamental dimensioning rules requires all dimensions apply in the free-state condition for rigid parts. T/F 3. The fundamental dimensioning rules that apply on a drawing must be listed in the general notes. T/F 4. Where Rule #1 applies to a drawing, it limits the form of every feature of size on the drawing. T/F 5. Rule #1 limits the variation between features of size on a part. T/F 6. The designer must specify on the drawing which features of size use Rule #1. T/F T/F T/F 7. Rule #1 applies to nonrigid parts (in the unrestrained state). 8. A GO gage is a fixed-limit gage. 9. Rule #1 requires that the form of an individual regular feature of size is controlled by its limits of sizearrow_forwardFEAarrow_forward
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