Machine Tool Practices (11th Edition)
11th Edition
ISBN: 9780134893501
Author: Richard R. Kibbe, Roland O. Meyer, Jon Stenerson, Kelly Curran
Publisher: PEARSON
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Chapter A.3, Problem 7ST
To determine
Two compressed-air hazards.
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You are asked to design a unit to condense ammonia. The required condensation rate is 0.09kg/s. Saturated ammonia at 30 o C is passed over a vertical plate (10 cm high and 25 cm wide).The properties of ammonia at the saturation temperature of 30°C are hfg = 1144 ́10^3 J/kg andrv = 9.055 kg/m 3 . Use the properties of liquid ammonia at the film temperature of 20°C (Ts =10 o C):Pr = 1.463
rho_l= 610.2 kf/m^3
liquid viscosity= 1.519*10^-4 kg/ ms
kinematic viscosity= 2.489*10^-7 m^2/s
Cpl= 4745 J/kg C
kl=0.4927 W/m CCalculate the surface temperature required to achieve the desired condensation rate of 0.09 kg/s( should be 688 degrees C) a) Show that if you use a bigger vertical plate (2.5 m-wide and 0.8 m-height), the requiredsurface temperature would be now 20 o C. You may use all the properties given as an initialguess. No need to iterate to correct for Tf. b) What if you still want to use small plates because of the space constrains? One way to getaround this problem is to use small…
Chapter A Solutions
Machine Tool Practices (11th Edition)
Ch. A.1 - Prob. 1STCh. A.1 - Prob. 2STCh. A.1 - Companies are looking for people with good...Ch. A.1 - Prob. 4STCh. A.1 - Prob. 5STCh. A.1 - Prob. 6STCh. A.1 - Prob. 7STCh. A.1 - Prob. 8STCh. A.2 - Prob. 1STCh. A.2 - Prob. 2ST
Ch. A.2 - Prob. 3STCh. A.2 - Prob. 4STCh. A.2 - Prob. 5STCh. A.2 - Prob. 6STCh. A.2 - Prob. 7STCh. A.3 - What is the primary piece of safety equipment in...Ch. A.3 - Prob. 2STCh. A.3 - Prob. 3STCh. A.3 - Prob. 4STCh. A.3 - What hazards exist from coolants, oils, and...Ch. A.3 - Prob. 6STCh. A.3 - Prob. 7STCh. A.3 - Prob. 8STCh. A.3 - Prob. 9STCh. A.3 - Prob. 10STCh. A.3 - Prob. 11STCh. A.4 - Define the term pitch diameter.Ch. A.4 - Name two ways to measure a thread.Ch. A.4 - What is the rule of thumb for the length of...Ch. A.4 - Describe when class two fits are used.Ch. A.4 - Describe UNC and UNF.Ch. A.4 - What is the formula for calculating the OD of a...Ch. A.4 - When are stud bolts used?Ch. A.4 - Prob. 8STCh. A.4 - Explain two reasons why flat washers are used.Ch. A.4 - What is the purpose of a helical spring lock...Ch. A.4 - When is an internal-external tooth lock washer...Ch. A.4 - When are dowel pins used?Ch. A.4 - When are taper pins used?Ch. A.4 - When are roll pins used?Ch. A.4 - What are retaining lings?Ch. A.4 - Prob. 16STCh. A.4 - Prob. 17STCh. A.4 - Prob. 18STCh. A.5 - Prob. 1STCh. A.5 - Prob. 2STCh. A.5 - Prob. 3STCh. A.5 - Prob. 4STCh. A.5 - Prob. 5STCh. A.5 - Prob. 6STCh. A.6 - Prob. 1STCh. A.6 - Prob. 2STCh. A.6 - Prob. 3STCh. A.6 - Prob. 4STCh. A.6 - Prob. 5STCh. A.6 - Prob. 6STCh. A.6 - Prob. 7STCh. A.6 - Prob. 8STCh. A.6 - Prob. 9STCh. A.6 - Prob. 10STCh. A.7 - Prob. 1STCh. A.7 - Prob. 2STCh. A.7 - Prob. 3STCh. A.7 - Prob. 4STCh. A.7 - Prob. 5STCh. A.7 - Prob. 6STCh. A.7 - Prob. 7STCh. A.7 - Prob. 8STCh. A.7 - Prob. 9STCh. A.7 - Prob. 10STCh. A.8 - Prob. 1STCh. A.8 - Prob. 2STCh. A.8 - Prob. 3STCh. A.8 - Prob. 4STCh. A.8 - Prob. 5STCh. A.8 - Prob. 6STCh. A.8 - Prob. 7STCh. A.8 - Prob. 8STCh. A.8 - Prob. 9STCh. A.8 - Prob. 10STCh. A.8 - Prob. 11STCh. A.9 - Prob. 1.1QCCh. A.9 - Prob. 1.2QCCh. A.9 - Prob. 1.3QCCh. A.9 - Prob. 1.4QCCh. A.9 - Prob. 1.5QCCh. A.9 - Prob. 1.6QCCh. A.9 - Prob. 2.1QCCh. A.9 - Prob. 2.2QCCh. A.9 - Prob. 3.1QCCh. A.9 - Prob. 3.2QCCh. A.9 - Prob. 4.1QCCh. A.9 - Prob. 4.2QCCh. A.9 - Prob. 4.3QCCh. A.9 - Prob. 1STCh. A.9 - Prob. 2STCh. A.9 - Prob. 3STCh. A.9 - Prob. 4STCh. A.9 - Prob. 5STCh. A.9 - Prob. 6ST
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- Homework#5arrow_forwardQuestion 1: Beam Analysis Two beams (ABC and CD) are connected using a pin immediately to the left of Point C. The pin acts as a moment release, i.e. no moments are transferred through this pinned connection. Shear forces can be transferred through the pinned connection. Beam ABC has a pinned support at point A and a roller support at Point C. Beam CD has a roller support at Point D. A concentrated load, P, is applied to the mid span of beam CD, and acts at an angle as shown below. Two concentrated moments, MB and Mc act in the directions shown at Point B and Point C respectively. The magnitude of these moments is PL. Moment Release A B с ° MB = PL Mc= = PL -L/2- -L/2- → P D Figure 1: Two beam arrangement for question 1. To analyse this structure, you will: a) Construct the free body diagrams for the structure shown above. When constructing your FBD's you must make section cuts at point B and C. You can represent the structure as three separate beams. Following this, construct the…arrow_forwardA differential element on the bracket is subjected to plane strain that has the following components:, Ɛx = 300 × 10-6, Ɛy = 150 × 10-6, Ɛxy = -750 x 10-6. Use the strain-transformation equations and determine the normal strain Ɛx in the X/ direction on an element oriented at an angle of 0 = 40°. Note, a positive angle, 0, is counter clockwise. x Enter your answer in micro strain to a precision of two decimal places. eg. if your answer is 300.15X106, please enter 300.15.arrow_forwardIf the 50 mm diameter shaft is made from brittle material having an ultimate strength of σult=595 MPa for both tension and compression, determine the factor of safety of the shaft against rupture. The applied force, F, is 140 kN. The applied torque T, is 5.0 kN⚫m. Enter your answer to a precision of two decimal places. T Farrow_forwardЗіс 1 mH 10 Ω m 16 cos 2.5 × 104 A Lic 592 10 Ω 1 μFarrow_forwardHomework#5arrow_forwardHomework#5arrow_forwardOxygen (molar mass 32 kg/kmol) expands reversibly in a cylinder behind a piston at a constant pressure of 3 bar. The volume initially is 0.01 m3 and finally is 0.03 m3; the initial temperature is 17°C. Calculate the work input and the heat supplied during the expansion. Assume oxygen to be an ideal gas and take cp = 0.917 kJ/kg K. For 1 bonus mark explain why (using your understanding of thermodynamics) that oxygen is used in this context rather than water vapour.arrow_forwardHydrodynamic Lubrication Theory Q1: Convert this equations into Python by 1- ah ap a h³ ap 1..ah = ax 12μ ax ay 12μ ay 2 ax Where P=P(x, y) is the oil film pressure. 2- 3μU (L² ε sin P= C²R (1+ cos 0)³ Q2: prove that |h(0) = C(1+ cos 0) ?arrow_forward### To make a conclusion for a report of an experiment on rockets, in which the openrocket software was used for the construction and modeling of two rockets: one one-stage and one two-stage. First rocket (single-stage) reached a maximum vertical speed of 200 m/s and a maximum height of 1000 m The second rocket (two-stage) reached a maximum vertical speed of 250 m/s and a maximum height of 1800 m To make a simplified conclusion, taking into account the efficiency of the software in the study of rocketsarrow_forwardWhat is the difference between saturated liquid and compressed liquid? What is the difference between the critical point and the triple pointarrow_forwardWhat is quality? Does it have any meaning in the superheated vapour region? What is the difference between saturated vapor and superheated vapour? What is the difference between saturated liquid and compressed liquid? What is the difference between the critical point and the triple point?arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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