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 34, Problem 20RQ
The plenum-mounted humidifier is installed in the ____plenum.
A. supply
B. return
C. supply or return
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An AISI 1018 steel ball with 1.100-in diameter is used as a roller between a flat plate
made from 2024 T3 aluminum and a flat table surface made from ASTM No. 30 gray
cast iron. Determine the maximum amount of weight that can be stacked on the
aluminum plate without exceeding a maximum shear stress of 19.00 kpsi in any of the
three pieces. Assume the figure given below, which is based on a typical Poisson's
ratio of 0.3, is applicable to estimate the depth at which the maximum shear stress
occurs for these materials.
1.0
0.8
Ratio of stress to Pmax
0.4
90
0.6
στ
Tmax
0.2
0.5a
a
1.5a
2a
2.5a
За
Distance from contact surface
The maximum amount of weight that can be stacked on the aluminum plate is
lbf.
A carbon steel ball with 27.00-mm diameter is pressed together with an aluminum ball
with a 36.00-mm diameter by a force of 11.00 N. Determine the maximum shear
stress and the depth at which it will occur for the aluminum ball. Assume the figure
given below, which is based on a typical Poisson's ratio of 0.3, is applicable to estimate
the depth at which the maximum shear stress occurs for these materials.
1.0
0.8
Ratio of stress to Pma
9 0.6
στ
24
0.4
Tmax
0.2
0
0.5a
a
1.5a
Z
2a
2.5a
За
Distance from contact surface
The maximum shear stress is determined to be
MPa.
The depth in the aluminum ball at which the maximum shear stress will occur is
determined to be [
mm.
Chapter 34 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 34 - List five different sources of indoor air...Ch. 34 - ASHRAE Standard "Ventilation for Acceptable Indoor...Ch. 34 - Radon is a (n) _____, _____, and _____gas.Ch. 34 - Three different biological contaminants are...Ch. 34 - What are two substances molds need in order to...Ch. 34 - Three methods of controlling indoor air...Ch. 34 - If radon gas is suspected, what should be done?Ch. 34 - How does ventilation help to improve air quality?Ch. 34 - Three general types of air cleaners are_______....Ch. 34 - True or False: Carbon monoxide is produced by...
Ch. 34 - Describe the difference between absorption and...Ch. 34 - True or False: Fiberglass filter media is...Ch. 34 - An electrostatic precipitator is the same as A. an...Ch. 34 - The purifier ingredient in an activated charcoal...Ch. 34 - Ion generators_______particles m an area. A....Ch. 34 - The relative humidity in heated homes is generally...Ch. 34 - The recommended relative humidity for a home is...Ch. 34 - True or False: Some humidifiers have their own...Ch. 34 - Static electricity is more commonly a problem when...Ch. 34 - The plenum-mounted humidifier is installed in the...Ch. 34 - Describe the difference between an evaporative and...Ch. 34 - Why is it essential for the furnace to be...
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