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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Textbook Question
Chapter 8, Problem 14RQ
What is today's most accurate type of deep vacuum gauge?
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Ex. Create an estimated S-N diagram for an aluminum bar and
define its equation
.
what is the corrected fatigue strength at
N = 2 #10 cycles ? Out = 310 MPa, the forged bar is 3.81 cm in
N=2107
round. The load is fully reversed torsion.
and
Ex. Create an estimation of S-N diagram for asteel, axially loaded
bar and define its equation. How many cycles of life can be expected
if the alternating stress is 100 MPa. The bar is 150 min
has a hot-rolled finish. The operating temp. is 500 °C. out 600. MPa.
The loading will be. pure axial, fully reversed.
Square
=
Create an estimation of S-N diagram for asteet, axially loaded
bar and define its equation. How many cycles of life can be expected
if the alternating stress is 100 MPa. The bar is 150 mm
has
9
The loading will be. pure axial, fully reversed.
hot-rolled finish. The operating temp. is 500 °C. Out = 600 MPa.
Square and
Chapter 8 Solutions
Lab Manual for Tomczyk/Silberstein/ Whitman/Johnson’s Refrigeration and Air Conditioning Technology, 8th
Ch. 8 - The low-pressure side of the system must not be...Ch. 8 - Name and briefly describe the six classes of...Ch. 8 - The ________is both the greatest asset and the...Ch. 8 - Why should oxygen or compressed air never be used...Ch. 8 - List some of the foreign matter that may enter a...Ch. 8 - True or False: A vacuum pump can remove any type...Ch. 8 - Air in a refrigeration system causes which of the...Ch. 8 - The only two products that should be circulating...Ch. 8 - In order to remove moisture from a refrigeration...Ch. 8 - Are the best vacuum pumps one-stage or two-stage?
Ch. 8 - Name the two types of vacuum procedures used by...Ch. 8 - What can be done to get water out from under the...Ch. 8 - When evacuating a refrigeration system that has...Ch. 8 - What is today's most accurate type of deep vacuum...Ch. 8 - _________microns are in 1 inch.Ch. 8 - Briefly describe the method for cleaning up a...Ch. 8 - What is the advantage of using large gauge lines...Ch. 8 - Why is it important to change the oil on a vacuum...Ch. 8 - Describe the meaning of a deep vacuum, and explain...Ch. 8 - List the main advantages of a microfoam leak...Ch. 8 - What could an oily dust spot on a condenser or...Ch. 8 - Why should a condenser be covered with a sheet...Ch. 8 - Leaks that occur only when the unit is in...Ch. 8 - Briefly describe a combination-dependent leak.
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- Ex. Repeat Ex. in page (24), with fluctuating load as shown below. By = 462 M2, Out = 552 MPa. Find the safety factor (NF) using Modified - Goodman, Gerber, and soderberg criterias F(N) 400 100 timearrow_forwardut Ex. The cantilever beam shown is, made from steel with σ = 552 MPa is subjected to fully reversed load. Neglect shear stress q :10 cycles effect, estimate wheather the beam is safe or not safe at N= los The beam is machined surface and the operating temp. is 100c. D 764 L= 10cm L D= 1.3 Cm d = 1 cm b= 1 cm momend diagram -FLarrow_forwardEx. Design to Carry a Cylindrical thin pressure vessel with hemispherical ends for infinite life. Find the appropriate, thickness (t) of the vessel a sinusoidal pressure varied from (0) to (1 MPa). the vessel is made from steel 1030 hotrolled with out = 467.MP¬ and the operating temperature is 300 °C. The diameter of the cylinder D= 0.3 m . Using safety factor N = 2.arrow_forward
- Ex. Create an estimated S-N diagram for an aluminum bar and define its equation what is the corrected fatigue strength at 7 N = 2 * 10 cycles ? Out = 310 MPa, the forged bar is 3.81 cm in round. The load is fully reversed torsion.arrow_forward1 Estimate the factor of safety fora ductile materail having by = 100 MPa, with the state of stress shown in the element. 30 MPa 12MPA zo M R HP. 1 12MP 30 MPa 20 MPa x '12 MPaarrow_forwardEx. Find the stress concentration factor of grooved shafts that loaded as shown , take 2=2, f = 0.15 j= T тв d a- _b_ _C-arrow_forward
- Ex. Determine the safety factors for the bracket rod based on the distortion "energy theory and max. shear theory both Given: L= 6 in held 47000 Psi and material is ductile. a = 8 in d = 1.5 in F = 7000-16 arm し Tod F a darrow_forwardEx. For a plate that made from a brittle material alloy shown below, Find the max. stress that occur. P=5KN d=2cm w= 10 cm t=0.2 cmarrow_forwardEx. A circular cantilever rod, shown in the Fig. below, is to be made * from al ductile material with field strength of 276 MPa Using design factor N = 2 factor N = 2, Find the appropriate diameter(d). d F= 1.75 KN P=9KN 120mmarrow_forward
- Ex. A circular rod, constructed of ductile material of tensile a "strength yd 300 MPa", is subjected to a torque T = 500 TE N.m. and axial tensile load "P. The diameter of the rod d= 50 mm •Using Tresca criterion with N=1.2, Find allowable P.arrow_forwardQwhat are the steps to draw failure theories on a chart paper: 1- Tresca theory 2- von Mises theory 3- Rankine theory Explain this in detailarrow_forwardA power transistor with three 0.8 mm diameter leads of a copper-silver alloy (k = 400 W/m-K) dissipates 3.5 Watts of power. The printed circuit board (PCB) on which the transistor is mounted is maintained at 30 C. The air temperature is 20 C and the heat transfer coefficient for the leads is 60 W/m² K. The length of the leads from the transistor to printed circuit board is 9.0 mm. (a) Determine the maximum lead temperature neglecting all convection effects. (b) Determine the maximum lead temperature if convection is present. T=20C h = 60 W/m²K Air Power Transistor Lead k = 400 W/m K TPCB = 30 C 9 mmarrow_forward
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