Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 15, Problem 7ASRQ
While discussing copper wire: Technician A says that if the length of wire is doubled, the resistance between the wire ends is doubled. Technician B says that if the diameter of a wire is doubled, the resistance between the wire ends is doubled. Who is correct?
- Technician A
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The assembly shown consists of a weightless, rigid bar AC, pinned at B, that is attachedto the steel and aluminum rods. Initially, bar AC is in horizontal position; there is agap, Δ = 9 mm, between the lower end of the steel rod and its pin support at D.Neglecting the weight of the rods, compute their stresses when they are subjected to atemperature increase of 35°C and the lower end of the steel rod is attached to itssupport.
answers: σSt = 194.617 MPaσAl = 97.308 MPa
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3. Three cables at an ambient temperature of 75°C are connected in series. The assemblyis subjected to a total tension force P = 3.75 kN. The properties of the three cables aregiven in the provided table.a. At 100°C, what is the total elongation of the assembly?b. If the said cables are arranged in a parallel assembly, determine the stress anddeformation of each cable subjected to the same tension force given andtemperature change in (a).
Answers: (a) PSt = 96.019 kN (C) PAl = 170.789 kN (T)(b) σSt = 40.884 MPa σAl = 53.311
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A rod is composed of three segments subjected to axial loads as shown. The propertiesof each segment are given in the provided table. Determine the failure stresses of eachmaterial if the whole assembly experienced:a. A total temperature drop of 50°C and sprung 1.2 mm.b. A total temperature rise of 50°C, and assuming it is firmly attached to unyieldingsupports.Assume FS = 1.85.
ANSWERS: (a) σfail St = 356.952 MPa σfail Br = 93.126 MPa σfail Al = 91.615 MPa (b) σfail St = 320.754 MPa σfail Br = 148.912 MPa σfail Al =
Chapter 15 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 15 - What is represented by the E, I, and R in the...Ch. 15 - Prob. 2RQCh. 15 - What are the two types of wires and which is the...Ch. 15 - Define voltage drop.Ch. 15 - Define circuit protection.Ch. 15 - What is a normally dosed switch?Ch. 15 - Prob. 7RQCh. 15 - What is the difference between voltage and...Ch. 15 - What is an SPST switch?Ch. 15 - Which type of resistor is commonly used in...
Ch. 15 - Prob. 11RQCh. 15 - Solve the parallel circuit for total circuit...Ch. 15 - Prob. 13RQCh. 15 - Prob. 14RQCh. 15 - Prob. 15RQCh. 15 - Prob. 1ASRQCh. 15 - Prob. 2ASRQCh. 15 - WHiile discussing the circuit shown in Figure...Ch. 15 - While discussing electrical grounds: Technician A...Ch. 15 - Prob. 5ASRQCh. 15 - Prob. 6ASRQCh. 15 - While discussing copper wire: Technician A says...Ch. 15 - While discussing current flow: Technician A says...Ch. 15 - While discussing voltage Technician A says that...Ch. 15 - While discussing the AWG system: Technician A says...
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