Lab Manual for Tomczyk/Silberstein/ Whitman/Johnson’s Refrigeration and Air Conditioning Technology, 8th
8th Edition
ISBN: 9781305578708
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 14, Problem 21RQ
Describe a method for speedmg up the cooling of an open motor.
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reading is 0.4 mas SHOWN.
Assume h₁ = 0.4 m, h₂ = 0.5 m.
(a) Do you know the specific weight of mercury?
(b) Do you know the specific weight of gasoline?
(c) Do you know the specific weight of oil?
(a) YHg
=
133,000
(b) Ygas
= 6867
(c) Yoil =
8829
eTextbook and Media
Part 2
N/m³
N/m³
N/m³
A+
Gasoline
t
+B
Oil
-Mercury
Attempts: unlimited
Did you calculate the pressure difference between two locations using the correct specific weight?
Did you assume that the pressures in fluid are the same in a horizontal plane even though they are in different tubes?
Are the calculated pressures in a column of fluid always higher at lower elevations?
Did you account for the fact that the two horizontal tubes of the U-tube are above the ground?
Concepts: The pressure in a fluid is a function of the specific weight of the fluid and the height relative to a reference.
Pressure is constant in a horizontal plane of a continuous mass of fluid.
(a) What is the initial pressure difference? (PA-PB)
(b) What is…
Find the solution of the following Differential Equations
1)
"-4y+3y=0
3) "+16y=0
2) y"-16y=0
4) y"-y-6y=0
5) y"+2y=0
7) y"+y=0, (#0)
9) y"-y=0, y(0) = 6, y'(0) = -4
11) y"-4y+3y=0, y(0)=-1,
13)
y'(0) = -5
"+2y+2y=0
15) y"-9y=0
17) y"-4y=0
6) y"-2y+2y=0
8)
"+4y+5y=0
10) y"-9y=0, y(0) = 2, y'(0) = 0
12) y"-3y+2y= 0, y(0)=-1,
y'(0) = 0
14) 4y+4y+y=0
16) "+6y+12y=0
18) 4y+4y+17y=0
Chapter 14 Solutions
Lab Manual for Tomczyk/Silberstein/ Whitman/Johnson’s Refrigeration and Air Conditioning Technology, 8th
Ch. 14 - Why is a low-voltage thermostat normally more...Ch. 14 - The three kinds of switching mechanism used in...Ch. 14 - Prob. 3RQCh. 14 - What does a cold anticipator do?Ch. 14 - Define system overshoot when dealing with...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Describe the method a service technician should...Ch. 14 - Explain how microelectromc or electrontc...Ch. 14 - Prob. 10RQ
Ch. 14 - What component steps down the voltage to the...Ch. 14 - Low voltage is desirable for residential control...Ch. 14 - What is the maximum amperage usually encountered...Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - What two types of switches are normally found in...Ch. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Why is a line-voltage thermostat mounted on an...Ch. 14 - What is the principle of operation for most...Ch. 14 - Describe a method for speedmg up the cooling of an...Ch. 14 - Describe two methods for cooling an overheated...Ch. 14 - How can an electronic thermometer be used in a...Ch. 14 - A temperature-sensing device used in measuring...Ch. 14 - How does a thermocouple change with a temperature...Ch. 14 - True or False: Pressures below atmospheric...Ch. 14 - Name one function of the low-pressure control.Ch. 14 - Which is true of a high-pressure control? A. It...Ch. 14 - Name two types of water pressure control.Ch. 14 - Why should a safety control not be adjusted if it...Ch. 14 - Prob. 31RQCh. 14 - True or False: A change in the differential...Ch. 14 - True or False: A change in the differential of a...Ch. 14 - Prob. 34RQCh. 14 - Explain what is meant by the range of a...
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- Access Pearson Mastering Engineering Back to my courses Course Home Course Home Scoresarrow_forwardAccess Pearson Mastering Engineering Back to my courses Course Home Course Home Scores Review Next >arrow_forwardAccess Pearson Course Home Scoresarrow_forwardCan you answer this question?arrow_forwardCan you answer this question?arrow_forwardA gear has a gear wheel with 16 teeth. The gear should be dimensioned for the highest and lowest gear ratio. Looking for output power, torque, speed?nin= 2000 rpmmin = 30Nmn=0,9a max= 450 mmModule 4Gear limitsz1 z213 13-1614 14-2615 15-4516 16-10117 17-131418 18-…..I have calculate but I can’t get the right answers…..√16 =459x60/56x57=1.1 lowest59x60/13x13=20,94 highestnut=2000/1.1= 1818rpmnut=2000/20.94=95.5 rpmMut=1.1x30=33 NmMut=20.94x30=628,2 Nm(Right answer)LowestZ=13, M=24,4Nm, n=2462 rpmHighestZ=92, M=172,5Nm, n=347,8 rpmP=5655W on botharrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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