Bundle: Electricity For Refrigeration, Heating, And Air Conditioning, 10th + Refrigeration And Air Conditioning Technology, 8th + Mindtap Hvac, 4 ... Whitman/johnson's Refrigeration And Air Condi
8th Edition
ISBN: 9780357261385
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 33, Problem 30RQ
Why are solar systems intended to be used as a supplementary heat source?
A. Because they are more expensive to operate than conventional systems
B. Because the amount of heat generated by solar systems varies depending on a number of environmental factors
C. Both A and B are correct
D. Neither A nor B is correct
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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
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P=2 kN
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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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12
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)
sarmad. u. s22
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Chapter 33 Solutions
Bundle: Electricity For Refrigeration, Heating, And Air Conditioning, 10th + Refrigeration And Air Conditioning Technology, 8th + Mindtap Hvac, 4 ... Whitman/johnson's Refrigeration And Air Condi
Ch. 33 - A hydronic heating system uses ______to move heat...Ch. 33 - Describe a zone in a hydronic heating system.Ch. 33 - Name four sources of heat commonly used for...Ch. 33 - Give three reasons that air is detrimental to a...Ch. 33 - Explain the difference between a wet-base and a...Ch. 33 - Where is air vented from a hydronic heating...Ch. 33 - The "point of no pressure change" is located at...Ch. 33 - The purpose of a limit control in a boiler is to...Ch. 33 - The device that relieves the pressure in a boiler...Ch. 33 - Describe the function of a low-water cutoff.
Ch. 33 - The relief valve setting for a typical...Ch. 33 - Describe how an air cushion tank functions in a...Ch. 33 - True or False: City water does not contain air.Ch. 33 - State two ways that air can get into a hydronic...Ch. 33 - The most common type of pump used for hydronic...Ch. 33 - Another term for pump pressure is feet of _______.Ch. 33 - Two types of zone control valves are the _____and...Ch. 33 - Why must expansion be considered when sizing...Ch. 33 - How is expansion in hot water pipes handled?Ch. 33 - Sketch the following systems: one pipe, two-pipe...Ch. 33 - Describe the advantage of a two-pipe...Ch. 33 - The pressure differential bypass valve is most...Ch. 33 - What is the heat output, in Btu/h, of a terminal...Ch. 33 - In a primary-secondary pumping arrangement, the...Ch. 33 - The temperature of the water at the outlet of a...Ch. 33 - A tankless water-heating system gets its heat from...Ch. 33 - How much of the sun's energy actually reaches the...Ch. 33 - The varying intensity of the sun's energy that...Ch. 33 - Drain-down systems would best be used in which...Ch. 33 - Why are solar systems intended to be used as a...
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- 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
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