Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 51, Problem 8ASRQ
While discussing what would happen if too much metal is removed from a drum by machining: Technician A says that noise can result from the thin drum vibrating when the brakes are applied. Technician B says that the brakes could fade because the thin drum is unable to absorb heat during braking. Who is correct?
- Technician A only
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A 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 mm
A window in a tall building experiences a horizontal wind flow parallel to the surface at a velocity of 8 m/s. The window
measures 2 m high, 1.5 m wide and 6.5 mm thick. The transition from the building wall to the window glass surface is
not smooth. The window casement that surrounds the edge of glass pane is raised 10 mm above the surface of the glass
and adjacent wall structure. Inside the building, the air temperature and heat transfer coefficient for the interior surface
are 21 °C and 9 W/m² K respectively. The window has a uniform thermal conductivity of 1.4 W/m K. If the outdoor air
temperature is 5 °C, determine the rate of convective heat loss from the window. Develop a thermal resistance network
for the window system. Please state and justify all assumptions. Neglect any conduction through the casement.
Assume the following air properties: kair =0.0248 W/m K, v= 14.20 x 106 m²/s, Pr = 0.712.
Outside Air
u=8m/s
T=5°C
casement
glass
Inside
2 m
T=21°C
h=9W/m² K
6.5 mm
1.5 m…
A thin electrical heater that dissipates 2 kW of thermal energy is position between two plane walls. The thickness of
each wall is shown in the figure below. The thermal conductivities of sections A and B are 3 W/m C and 0.8 W/m C
respectively. The electrical heater is assumed to be highly conductive (k=200 W/m C). The exterior surface of each wall
experiences convective conditions as summarized below.
(a) Construct the thermal circuit representing the steady state heat transfer for the system. Label all nodes, resistances
and relevant terms.
(b) Determine the temperate of the electrical heater.
T = 50 C
h = 200 W/m² C
A
10 cm
6 cm
B
Electrical
Heater
T_ = 20 C
h = 50 W/m² C
K₁ = 3 W/m²K
0.05 cm
k₁ = 0.08 W/m² K
Chapter 51 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 51 - Name the two methods of attaching brake lining...Ch. 51 - Explain how drum brakes create a self-multiplying...Ch. 51 - List at least five separate types of wear and...Ch. 51 - What is the job of wheel cylinder stops?Ch. 51 - Explain the operation of an integral drum brake...Ch. 51 - In a typical drum brake, which component provides...Ch. 51 - True or False? The name duo-servo drum brake is...Ch. 51 - Prob. 8RQCh. 51 - Which of the following statements about drum brake...Ch. 51 - Brake linings should be replaced when. linings are...
Ch. 51 - In the unapplied position, drum brake shoes arc...Ch. 51 - Duo-servo drum brakes are also known as what type...Ch. 51 - On most vehicles, the automatic adjuster cables or...Ch. 51 - Backing plates, struts, levers, and other metal...Ch. 51 - A buildup of brake dust and dirt between the...Ch. 51 - Technician A says that an out-of-round drum can...Ch. 51 - Technician A says that a grinding noise from a...Ch. 51 - It has been determined that chatter and brake pull...Ch. 51 - Technician A says that the discard dimension of a...Ch. 51 - After resurfacing a brake drum: Technician A...Ch. 51 - Drum linings are badly worn at their heel and toe:...Ch. 51 - When machining brake drums: Technician A tries to...Ch. 51 - While discussing what would happen if too much...Ch. 51 - Technician A checks the surface of the drum for...Ch. 51 - While discussing pull during braking: Technician A...
Knowledge Booster
Learn more about
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
- I need answer with diagram and not from AIarrow_forwardOne -1/x²-10.5x+1Z 84.5 11 2x2 +212 +382 2 2 -23.500 81 4th Year 24. (i) Derive a mathematical model for the mechanical system represented below, where the input Automation and Control is the Force F, and the output is the displacement x. (ii)Determine the general transfer function of the system given that the input is an impulsive force of 10N and the following constants (iii\Determine the output as a F(s) (iii) What is the output x as a function of time? EX Rnd 0 COM 7 4 Ran# Ra 25 (N/m) 5 kg 30 (N.s/m) Ans(i) ref notes 2 2 s² + 6s+5 25. A control system has a forward path transfer function of (111) (iii) x(t) = 0.5(e-t-e-5t) 2 and a negative feedback loop four S+2 with a transfer function 4. What will be the (time) response of the system to a unit step input? Ans: 0.2(1-e-10) 10 26. A control system has a forward path transfer function of and a negative feedback loop S+3 with a transfer function 5. What will be the (time) response of the system to a (a) unit impulsive input? (b) a…arrow_forwardfour One -H = 2x2 +212 +382 2 x² -23.5x + x37 84 x -10.5x+h 84.5 Automation and Control 4th Year 24. (i) Derive a mathematical model for the mechanical system represented below, where the input is the Force F, and the output is the displacement x. (ii)Determine the general transfer function of the system given that the input is an impulsive force of 10N and the following constants (iii\Determine the output as a F(s) (iii) What is the output x as a function of time? 25 (N/m) F 5 kg 30 (N.s/m) 2 Ans(i) ref notes (iii) (iii) x(t) = 0.5(e-t-e-st) 2 and a negative feedback loop S+2 s² + 6s+5 25. A control system has a forward path transfer function of with a transfer function 4. What will be the (time) response of the system to a unit step input? CON 4 1 Rnd Rane R 0 EL SALVADOR Ans: 0.2(1-e-10) 10 s+3 and a negative feedback loop 26. A control system has a forward path transfer function of with a transfer function 5. What will be the (time) response of the system to a (a) unit impulsive…arrow_forward
- find the temperature distribution of the beam shown below, take &=o.!! and L-1m- of C" loko -10C" 30 со h2 5 Kwlm²-ko T = 250° q=30twarrow_forwardQ1/Create an estimated (S-N) diagram and define its equation for an axial fully reversed loaded steel bar. Its cross section shown in figure (1). Determine the life in cycle that can be expected if the alternating stress is (127Mpa). The bar surface finch is hot rolled. The operating temperature is (506 Co) and (du-577 Mpa). 120 mm. 4arrow_forwardQ4/ Find using a proper design theory the safety factor (N) based on point A for the circular cantilever rod of a diameter (94 mm) shown in figure 3. Knowing that the rod is made of Stainless Steel Type 304-cold rolled, Which is subjected to a force (F= 6.4 kN) inclined with y-axis by 0-72° and to a torque (T= 265π N. m). Fig.3 L1=3.2 cm L2= 3.6 cm F Z Y X (15 Marks) Q5/ Create an estimated S-N diagram and define its equation for an aluminum rectangular bar, shown in figure 4 below, with a (out=342Mpa). The bar is loaded in a fully reversed bending and the bar radius is 12 mm. Determine also the corrected fatigue strength at (N=2.3* 107 cycles). Knowing that the bar surface finch is ground, the operating temperature is 155 C°, and Take a 99.99% reliability factor. Fig. 4 h=5.6 cm Head of the Department: Dr. Deyaa Hassan Jawad Al-Jashami b=4 cm *** Best of Luck *** (15 Marks) Examiner: Ass. Lect. Ahmed A. Tomanarrow_forward
- University of Babylon Collage of Engineering\Al-Musayab Department of Automobile Engineering Under Grad/Third stage Notes: 1-Attempt Four Questions. 2- Q4 Must be Answered 3-Assume any missing data. 4 تسلم الأسئلة بعد الامتحان مع الدفتر Subject: Mechanical Element Design I Date: 2022\01\25 2022-2023 Time: Three Hours Course 1 Attempt 1 Q1/ Design a thin cylindrical pressure tank (pressure vessel) with hemispherical ends to the automotive industry, shown in figure I below. Design for an infinite life by finding the appropriate thickness of the vessel to carry a sinusoidal pressure varied from {(-0.1) to (6) Mpa}. The vessel is made from Stainless Steel Alloy-Type 316 sheet annealed. The operating temperature is 80 C° and the dimeter of the cylinder is 36 cm. use a safety factor of 1.8. Fig. 1 (15 Marks) Q2/ Answer the following: 1- Derive the design equation for the direct evaluation of the diameter of a shaft to a desired fatigue safety factor, if the shaft subjected to both fluctuated…arrow_forwardwhat is the scientific interpetation of all of what comes: 1- axial loading 2- Direct shear loading 3- Torsional loading 4. Bending load 4- Explain it in detail and how to use it to solve mechanical design Problemsarrow_forwardConsider the magnetic levitation system shown in Figure 1. An electromagnet is located at the upper part of the experimental system. Using the electromagnetic force f, you want to suspend the iron ball. Assume that the state variables are x₁ = x, x2 = x, and x3 =i. The electromagnet has an inductance L = 0.508H and a resistance R = 23.2. Use a Taylor series approximation for the electromagnetic force. The current is i₁ = 10 + i, where I = 1.06A is the operating point and i is the variable. The mass m is equal to 1.75kg. The gap is x = x + x, where x = 4.36mm is the operating point and x is the variable. The electromagnetic force is f = k(₁₁/xg)², where k = 2.9 × 10-4 Nm²/A². a) Determine the state matrix differential equation. b) Find the equivalent transfer function X(s)/V(s). Note: v(t) (+ Electromagnet i₁(t) Iron ball Force f(t) x(t) mg Gap sensor Figure 1 The magnetic levitation system is essentially unworkable. Hence, feedback control is crucial. A standard induction probe of the…arrow_forward
- Q3/ a steel plate shown in figure (3): Su689 Mpa, reliability is 90%, factor of safety is 2, the size factor is 0.87. machined surface. Determine the plate thickness (t) for infinite life. Note: All dimensions are in mm. P= ± 50 kN 100 Fig. 3 177 5r P = ± 50 kN 540 50arrow_forwardQ2/A cantilever beam, shown in figure (2), is to be made from [Wrought-Aluminum Alloys- 3003- cold rolled]. If the desired design factor is (N-2.5), (P-4kN), and (F-6kN). Using a suitable failure theory, find the appropriate beam thickness h. T D=15cm d=100mm r=20mm L= 25 cm Karrow_forwardSolve full assignment with steps pleasearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Automotive Technology: A Systems Approach (MindTa...Mechanical EngineeringISBN:9781133612315Author:Jack Erjavec, Rob ThompsonPublisher:Cengage Learning
Automotive TechnologyMechanical EngineeringISBN:9781337794213Author:ERJAVEC, Jack.Publisher:Cengage,
Automotive Technology: A Systems Approach (MindTa...
Mechanical Engineering
ISBN:9781133612315
Author:Jack Erjavec, Rob Thompson
Publisher:Cengage Learning
Automotive Technology
Mechanical Engineering
ISBN:9781337794213
Author:ERJAVEC, Jack.
Publisher:Cengage,
Mechanical Design (Machine Design) Clutches, Brakes and Flywheels Intro (S20 ME470 Class 15); Author: Professor Ted Diehl;https://www.youtube.com/watch?v=eMvbePrsT34;License: Standard Youtube License