REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
8th Edition
ISBN: 9781337370042
Author: TOMCZYK
Publisher: CENGAGE L
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Chapter 15, Problem 16RQ
To determine
Reason of finding an opened run winding on a motor by using ohmmeter not a voltmeter.
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2.2 (A). If the maximum stress allowed
in the copper of the cable of problem
2.1 is 60 MN/m2, determine the
maximum tension which C3.75 kN.1
10:41 م
1.1 (A). A 25mm squarecross-section
bar of length 300mm carries an axial
compressive load of 50kN.
Determine the stress set up ip the bar
and its change of length when the load
is applied. For the bar material
E = 200 GN/m2. [80 MN/m2; 0.12mm.l
2.1 (A). A power transmission cable
consists of ten copper wires each of
1.6 mm diameter surrounding three
steel
wires each of 3 mm diameter.
Determine the combined E for the
compound cable and hence determine
the extension
of a 30 m length of the cable when it is
being laid with a tension of 2 kN.
For steel, E200 GN/mZ; for copper,
E = 100 GN/mZ. C151.3 GN/mZ; 9.6
mm.]
10:41 م
Chapter 15 Solutions
REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
Ch. 15 - Name three types of automatic controls.Ch. 15 - Two categories ofelectric controls...Ch. 15 - What circuit is energized with the thermostat Y...Ch. 15 - The component in the system that is energized when...Ch. 15 - The ________terminal must be energized in the...Ch. 15 - The hot circuit in the thermostat is the...Ch. 15 - Is the heat anticipator in series or parallel with...Ch. 15 - The cooling anticipator is wired A. in parallel...Ch. 15 - Which anticipator is adjustable, heat or cool?Ch. 15 - True or False: The indoor fan must always run...
Ch. 15 - True or False: When the control transformer is not...Ch. 15 - Which of the following should be turned off while...Ch. 15 - The _______diagram is used to locate different...Ch. 15 - To trace the circuits in the unit, the...Ch. 15 - Prob. 15RQCh. 15 - Prob. 16RQCh. 15 - Prob. 17RQCh. 15 - True or False: Open switches will always read...Ch. 15 - Explain why a service technician must always know...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- question 662 thank youarrow_forward1.5 (A). A simple turnbuckle arrangement is constructed from a 40 mm outside diameter tube threaded internally at each end to take two rods of 25 mm outside diameter with threaded ends. What will be the nominal stresses set up in the tube and the rods, ignoring thread depth, when the turnbuckle cames an axial load of 30 kN? Assuming a sufficient strength of thread, what maximum load can be transmitted by the turnbuckle if the maximum stress is limited to 180 MN/mz? C39.2, 61.1 MN/m2, 88.4 kN.1arrow_forward1.3 (A). Define the terms shear stress and shear strain, illustrating your answer by means of a simple sketch. Two circular bars, one of brass and the other of steel, are to be loaded by a shear load of 30 kN. Determine the necessary diameter of the bars (a) in single shear, (b) in double shear, if the shear stress in the two materials must not exceed 50 MN/m2 and 100 MN/ mZ respectively. C27.6, 19.5, 19.5, 13.8mm.l 11arrow_forward
- 1.4 (A). Two forkend pieces are to be joined together by a single steel pin of 25mm diameter and they are required to transmit 50 kN. Determine the minimum cross-sectional area of material required in one branch of either fork if the stress in the fork material is not to exceed 180 MN/m2. What will be the maximum shear stress in the pin? C1.39 x 10e4mZ; 50.9MN/mZ.] 10:41arrow_forward1.2 (A). A steel tube, 25 mm outside diameter and 12mm inside diameter, cames an axial tensile load of 40 kN. What will be the stress in the bar? What further increase in load is possible if the stress in the bar is limited to 225 MN/mZ? [lo6 MN/m3; 45 kN.1arrow_forward1.11 (a) A test piece is cut from a brass bar and subjected to a tensile test. With a load of 6.4 kN the test piece, of diameter 11.28 mm, extends by 0.04 mm over a gauge length of 50 mm. Determine: (i) the stress, (ii) the strain, (hi) the modulus of elasticity. (b) A spacer is turned from the same bar. The spacer has a diameter of 28 mm and a length of 250mm. both measurements being made at 20°C. The temperature of the spacer is then increased to 100°C, the natural expansion being entirely prevented. Taking the coefficient of linear expansion to be 18 x 10-6/"C determine: (i) the stress in the spacer, (ii) the compressive load on the spacer. [C.G.] [64MN/m2, 0.0008, 80GN/m2, 115.2 MN/m2, 71 KN.] 10:41arrow_forward
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