Machine Tool Practices (10th Edition)
10th Edition
ISBN: 9780132912655
Author: Richard R. Kibbe, Roland O. Meyer, Warren T. White, John E. Neely, Jon Stenerson, Kelly Curran
Publisher: PEARSON
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Chapter A.1, Problem 7ST
To determine
Two compressed-air hazards.
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aversity of Baoyion
aculty of Engineering-AIMusyab
Automobile Eng. Dep.
Year: 2022-2023,
st Course, 1st Attempt
Stage: 3rd
Subject: Heat Transfer I
Date: 2023\01\23- Monday
Time: 3 Hours
Q4: A thick slab of copper initially at a uniform temperature of 20°C is suddenly exposed
to radiation at one surface such that the net heat flux is maintained at a constant value of
3×105 W/m². Using the explicit finite-difference techniques with a space increment of Ax
=
= 75 mm, determine the temperature at the irradiated surface and at an interior point that is
150 mm from the surface after 2 min have elapsed.
Q5:
(12.5 M)
A) A steel bar 2.5 cm square and 7.5 cm long is initially at a temperature of 250°C. It is
immersed in a tank of oil maintained at 30°C. The heat-transfer coefficient is 570 W/m². C.
Calculate the temperature in the center of the bar after 3 min.
B) Air at 90°C and atmospheric pressure flows over a horizontal flat plate at 60 m/s. The
plate is 60 cm square and is maintained at a…
University of Baby on
Faculty of Engineering-AIMusyab
Automobile Eng. Dep.
Year: 2022-2023.
1 Course, 1" Attempt
Stage 3
Subject Heat Transfer I
Date: 2023 01 23- Monday
Time: 3 Hours
Notes:
Q1:
•
•
Answer four questions only
Use Troles and Appendices
A) A flat wall is exposed to an environmental temperature of 38°C. The wall is covered
with a layer of insulation 2.5 cm thick whose thermal conductivity is 1.4 W/m. C,
and the temperature of the wall on the inside of the insulation is 315°C. The wall
loses heat to the environment by convection. Compute the value of the convection
heat-transfer coefficient that must be maintained on the outer surface of the
insulation to ensure that the outer-surface temperature does not exceed 41°C.
B) A vertical square plate, 30 cm on a side, is maintained at 50°C and exposed to room
air at 20°C. The surface emissivity is 0.8. Calculate the total heat lost by both sides
of the plate.
(12.5 M)
Q2: An aluminum fin 1.5 mm thick is placed on a circular tube…
Solve using graphical method and analytical method, only expert should solve
Chapter A Solutions
Machine Tool Practices (10th Edition)
Ch. A.1 - What is the primary piece of safety equipment in...Ch. A.1 - Prob. 2STCh. A.1 - Prob. 3STCh. A.1 - Prob. 4STCh. A.1 - What hazards exist from coolants, oils, and...Ch. A.1 - Prob. 6STCh. A.1 - Prob. 7STCh. A.1 - Prob. 8STCh. A.1 - Prob. 9STCh. A.1 - Prob. 10ST
Ch. A.1 - Prob. 11STCh. A.2 - Define the term pitch diameter.Ch. A.2 - Name two ways to measure a thread.Ch. A.2 - What is the rule of thumb for the length of...Ch. A.2 - Describe when class two fits are used.Ch. A.2 - Describe UNC and UNF.Ch. A.2 - What is the formula for calculating the OD of a...Ch. A.2 - When are stud bolts used?Ch. A.2 - Prob. 9STCh. A.2 - Explain two reasons why flat washers are used.Ch. A.2 - What is the purpose of a helical spring lock...Ch. A.2 - When is an internal-external tooth lock washer...Ch. A.2 - When are dowel pins used?Ch. A.2 - When are taper pins used?Ch. A.2 - When are roll pins used?Ch. A.2 - What are retaining lings?Ch. A.2 - Prob. 17STCh. A.2 - Prob. 18STCh. A.2 - Prob. 19STCh. A.3 - Prob. 1STCh. A.3 - Prob. 2STCh. A.3 - Prob. 3STCh. A.3 - Prob. 4STCh. A.3 - Prob. 5STCh. A.3 - Prob. 6STCh. A.3 - Prob. 7STCh. A.3 - Prob. 8STCh. A.3 - Prob. 9STCh. A.3 - Prob. 10STCh. A - Companies are looking for people with good...Ch. A - Prob. 4STCh. A - Prob. 5STCh. A - Prob. 6STCh. A - What is the basis of the five S tool?Ch. A - Prob. 8STCh. A - Prob. 9STCh. A - What is poka-Yoke?
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- Need helparrow_forwardY F1 α В X F2 You and your friends are planning to move the log. The log. needs to be moved straight in the x-axis direction and it takes a combined force of 2.9 kN. You (F1) are able to exert 610 N at a = 32°. What magnitude (F2) and direction (B) do you needs your friends to pull? Your friends had to pull at: magnitude in Newton, F2 = direction in degrees, ẞ = N degarrow_forwardProblem 1 8 in. in. PROBLEM 15.109 Knowing that at the instant shown crank BC has a constant angular velocity of 45 rpm clockwise, determine the acceleration (a) of Point A, (b) of Point D. 8 in. Answer: convert rpm to rad/sec first. (a). -51.2j in/s²; (b). 176.6 i + 50.8 j in/s²arrow_forward
- Problem 4 The semicircular disk has a radius of 0.4 m. At one instant, when 0-60°, it is rotating counterclockwise at 0-4 rad/s, which is increasing in the same direction at 1 rad/s². Find the velocity and acceleration of point B at this instant. (Suggestion: Set up relative velocity and relative acceleration that way you would for a no-slip disk; remember what I told you to memorize on the first day of class.) (Answer: B = −2.98î - 0.8ĵ m/s, ãB = 2.45î - 5.74ĵ m/s²) B 0.4 m y Xarrow_forwardA C C 2r A 2r B B (a) (b) Problem 3 Refer to (b) of the figure shown above. The disk OA is now rolling with no slip at a constant angular velocity of w. Find the angular velocity and angular acceleration of link AB and BC. (Partial Answers: WBC = 2wk, AB = w²k)arrow_forwardProblem 2 Refer to (a) of the figure shown below, where the disk OA rotates at a constant angular velocity of w. Find the angular velocity and angular acceleration of link AB and link BC. (Partial Answers: WBC = wk, AB = w²k) A 2r C B (a) A 2r B (b)arrow_forward
- Example Two rotating rods are connected by slider block P. The rod attached at A rotates with a constant clockwise angular velocity WA. For the given data, determine for the position shown (a) the angular velocity of the rod attached at B, (b) the relative velocity of slider block P with respect to the rod on which it slides. b = 8 in., w₁ = 6 rad/s. Given: b = 8 in., WA = 6 rad/s CW constant Find: (a). WBE (b). Vp/Frame E 60° 20° Barrow_forwardY F1 α В X F2 You and your friends are planning to move the log. The log. needs to be moved straight in the x-axis direction and it takes a combined force of 2.9 kN. You (F1) are able to exert 610 N at a = 32°. What magnitude (F2) and direction (B) do you needs your friends to pull? Your friends had to pull at: magnitude in Newton, F2 = direction in degrees, ẞ = N degarrow_forward100 As a spring is heated, its spring constant decreases. Suppose the spring is heated and then cooled so that the spring constant at time t is k(t) = t sin + N/m. If the mass-spring system has mass m = 2 kg and a damping constant b = 1 N-sec/m with initial conditions x(0) = 6 m and x'(0) = -5 m/sec and it is subjected to the harmonic external force f (t) = 100 cos 3t N. Find at least the first four nonzero terms in a power series expansion about t = 0, i.e. Maclaurin series expansion, for the displacement: • Analytically (hand calculations) Creating Simulink Model Plot solutions for first two, three and four non-zero terms as well as the Simulink solution on the same graph for the first 15 sec. The graph must be fully formatted by code.arrow_forward
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