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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Chapter 29, Problem 16RQ
To determine
The process of respond to an undercharged TXV system.
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2.
3.
4.
clockwise from
Four masses A, B, C and D revolve at equal radii and are equally spaced along a shaft. The mass B
is 7 kg and the radii of C and D make angles of 90° and 240° respectively with the radius of B. Find
the magnitude of the masses A, C and D and the angular position of A so that the system may be
completely balanced.
[Ans. 5 kg: 6 kg; 4.67 kg; 205° from mass B in anticlockwise direction]
A rotating shaft carries four masses A, B, C and D which are radially attached to it. The mass
centres are 30 mm, 38 mm, 40 mm and 35 mm respectively from the axis of rotation. The masses
A, C and D are 7.5 kg. 5 kg and 4 kg respectively. The axial distances between the planes of
rotation of A and B is 400 mm and between B and C is 500 mm. The masses A and C are at right
angles to each other. Find for a complete balance,
1. the angles between the masses B and D from mass A,
2. the axial distance between the planes of rotation of C and D.
3. the magnitude of mass B.
[Ans. 162.5%,…
1. Four masses A, B, C and D are attached to a shaft and revolve in the same plane. The masses are 12
kg. 10 kg. 18 kg and 15 kg respectively and their radii of rotations are 40 mm, 50 mm, 60 mm and
30 mm. The angular position of the masses B, C and D are 60°, 135° and 270 from the mass A.
Find the magnitude and position of the balancing mass at a radius of 100 mm.
[Ans. 7.56 kg: 87 clockwise from A]
3. The structure in Figure 3 is loaded by a horizontal force P = 2.4 kN at C. The roller at E is
frictionless. Find the axial force N, the shear force V and the bending moment M at a section
just above the pin B in the member ABC and illustrate their directions on a sketch of the segment
AB.
B
P
D
A
65°
65°
E
all dimensions in meters
Figure 3
Chapter 29 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 29 - What is the first thing a technician should know...Ch. 29 - What is the coil-to-air temperature relationship...Ch. 29 - When food dehydration is not a factor, the...Ch. 29 - Prob. 4RQCh. 29 - Why is minimum dehydration not used on every job?Ch. 29 - What is the coil-to-air temperature relationship...Ch. 29 - At what evaporator temperature does an ice maker...Ch. 29 - What is the evaporator coil-to-air relationship...Ch. 29 - What is meant by the term approach when dealing...Ch. 29 - How can an evaporator be tested for efficiency?
Ch. 29 - How can a condenser be tested for efficiency?Ch. 29 - How can a hermetic compressor be tested for...Ch. 29 - A T XV system responds to an overcharge of...Ch. 29 - An automatic expansion valve system responds to an...Ch. 29 - A capillary tube system responds to an overcharge...Ch. 29 - Prob. 16RQCh. 29 - Prob. 17RQCh. 29 - Capillary tube
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