Bundle: Refrigeration And Air Conditioning Technology, 8th + Lab Manual + Lms Integrated For Mindtap Hvac-r, 4 Terms (24 Months) Printed Access Card
8th Edition
ISBN: 9781337087315
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 8, Problem 11RQ
Name the two types of vacuum procedures used by technicians.
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Quiz/Find the state of stresses and principal stresses at point (A)and point (B) for the
circular cantilever rod of a diameter (5 cm) shown in figure bellow. Knowing that the
rod is subjected to a force (F= 12 kN), axial force (P=2 kN) and to a torque (T=
488π N.m).
P=2 kN
T
L= 300 mm
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Quiz/ If the weld size equal to (0.9 cm) find the max allowable shear stress (Tmax) for
figure (1) bellow? All dimensions are in mm.
fuds
L
320 mm
Fig. 1
CUS
110
F = 400 N
235
160
36.23%
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9
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a-Write five advantages and two disadvantages of welded joints over riveted joints.
b- Define gas welding.
Q2/ A plate, 75 mm wide and 10 mm thick, is joined with another steel plate by means of single
transverse and double parallel fillet welds, as shown in Figl. The joint is subjected to a maximum
tensile force of 55 kN. The permissible shear stresses in the weld material is 50 N/mm2 respectively.
Determine the required length of each parallel filet weld. (Neglect the tensile stress in the parallel
welding lines and Design based on the shear stresses only)
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Chapter 8 Solutions
Bundle: Refrigeration And Air Conditioning Technology, 8th + Lab Manual + Lms Integrated For Mindtap Hvac-r, 4 Terms (24 Months) Printed Access Card
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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- HWS: 1. A round stepped cast iron shaft of diameters d and D with shoulder fillet radius r is loaded by an axial tensile load P, as shown in the figure below. Compute the value of P that may be applied to the bar without failure. Given: d = 25 mm, D = 50 mm, r = 3.75 mm, Sut = 250 MPa, Suc = 380 MPa, N=1.5. P 2. Make a report about the most effective techniques used by engineers to reduce the effects of stress concentration.arrow_forwardA conical pivot bearing 150mm in diameter has a cone angle of 120degree . If the shaft supports an axial load of 20kN and the coefficient of friction is 0.03,find the power lost in friction when the shaft rotates at 200r.p.m , assuming 1. Uniform pressure and uniform wear.arrow_forwardSolve step by steparrow_forward
- show the cam profile for a motion of a constant acceleration in the first 0.25 seconds, a constant velocity in the next 0.5 seconds and a constant deceleration in the last 0.25 seconds. total displacement is 8mm.arrow_forwardSolve step by steparrow_forwardAn element in plane stress is subjected to stresses ☐ x, y, and xx (see figure). Using Mohr's circle: a) Determine the principal stresses and the maximum in-plane shear stress acting at the point. b) Show these stresses in an appropriate sketch 12 MPa 27 MPa T 60 MPaarrow_forward
- 5 kN-m A beam with an inverted tee-shaped cross section is subjected to positive bending mo- ments of M₂ = 5 kN-m. The cross-sectional dimensions of the beam are shown below. 10 mm Determine: (a) the centroid location, the moment of inertia about the z axis, 40 mm 5 kN-m K 150 mm H 15 mm 120 mm (b) the bending stress at points H and K. ans: 17.83mPa (c) the maximum bending stress produced in the cross section.arrow_forwardEXAMPLE 6.4 Draw the shear and moment diagrams for the beam shown in Fig. 6-7a. 15 kN 80 kN·m -5 m B -5 m (a) 5 kN/m Darrow_forward2) A short rectangular post supports compressive loads of P- 175 kN and Q-90 kN, as shown in the figure below. A top view of the post showing the locations where loads P and Q are applied to the top of the post is also given. Determine the vertical normal stresses at corners a, b, c, and d of the post. P=175 kN Q=90 kN 160 mm 120 mm b 40 mm 160 mm a x d 60 mm 40 mmarrow_forward
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