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Problem 1 Otto Cycle (60 points) Use an air-standard Otto cycle to model a 4-cylinder engine. At the beginning of compression, the cylinder volume is 0.55L, the pressure is 98 kPa, and the temperature is 290 K. Copyright © 2023 Scott D Sawyer. All rights reserved. This material may not be reproduced, distributed, transmitted, displayed, published, or broadcast, in whole or in part, without the prior written permission of Scott D Sawyer. Any unauthorized use of this material is a violation of copyright law and will be pursued to the limit of civil and criminal penalties. At the end of compression, the cylinder volume is 0.046L. The temperature at the end of the combustion process is 2700 K. Use the specific heat ratio k = 1.4, and gas constant R = 287; kg.K Draw a schematic of the cylinder showing the volume at TDC, BDC, and displacement. Draw the cycle on T-s diagram Identify the 4 processes of the cycle Determine: (a) The compression ratio (b) The engine displacement (c) The temperature at the end of compression T? (d) The specific heat input qu (kJ/kg) (e) The temperature at the end of the power stroke T4 (f) The specific heat loss q (kJ/kg) (g) The specific work per cycle Wnet (kJ/kg) (h) The mass of air in the cylinder (kg) (i) The power produced by the engine at 8,500 rpm

Part I: Initiative Proposal Write a 350-to 525-word summary of the sustainability initiative you want to promote at the health care setting you selected. Your proposal should: Create a clear vision or mission statement that defines the scope of the initiative and would generate buy-in. Define what outcomes you expect to achieve over time. Be specific with what you can realistically deliver.

Title........... List of Figures List of Tables. Abstract Section 1. Introduction. Section 1.1 Project Goal... Coction 12 Significance Section 2. Background........ Section 2.1 Prior Arts in Research/Commercial Development.. Section 2.2 Team Member's Prior Experience.. Section 3. Approach/Design Section 3.1 Design Objective/Specification 1 Section 3.2 Design Objective/Specification 2. Section 3.3 Design Objective/Specification 3 I. ??????mm Section 4. Results and Discussions Section 5. Self Assessment...... Section 6. Conclusions Reference. Appendix. Cambria (Body) A A A UAE = Styles B I .iii iv 1 2 2 2 2 .2 .2 2 New Commen 5 5 5 LO 5 5 ??

7. Answer the following questions. [10 pt] ?. A solid sphere of mass 2 kg and radius 30 cm rolls down an incline without slipping. If the incline is 5 m high, how fast is the ball going at the bottom? b. A 500 g hoop with diameter 1.2 m is rolled down the same hill. If it too rolls without slipping, how fast is the hoop going at the bottom of the hill? c.Show that if the moment of inertia is given by I = CMR² , where c is a factor dependent on the shape of the object, that the acceleration down the incline is given by a=\left(\frac{1}{1+c}\right) g \sin \theta d. List two additional shapes with similarly formatted moments of inertia that could be rolled down the same hill. Rank all four (your two shapes, the sphere, and the hoop) in order of smallest to largest acceleration.

2) [6 points] Calculate the annual savings in gasoline and Ib CO, that would result from switching from a 19 mpg truck to a 34 mpg car. Assume the vehicle is driven 9,500 miles per year. (Note: the combustion of 7.5 gal of gasoline generates 150 lb of CO2).

1. Label the following as positive or negative. (5 pts) a) (C b) c) d)

AUM ????? ??????? ?????? ???????????? American University of The Middle East Course Code/Title : ME290 Global Eng. Prof. Seminar ME290 Assessment-4 (10%) Section Number H NOTES: Instructor Name : Dr. Ali Dinc Semester/Year : Spring 2023 Assignment/Homework/Project Report Title: The purpose of using Engineering Standards Due Date: 08 May 2023 (upload to Moodle as word file) as group of 2 students. Student 2: Similarity check will be done on this assessment (penalty points to be deducted). Therefore, Handwriting is not allowed. You should type in MS word (or pdf). *(you can delete all the questions and write only the answers to reduce/avoid similarity) Student Name and Number Student 1: Student declaration: By writing my/our names above, l/we attest that I/we have done this assessment /homework/ assignment with the group members written above. I understand that any act of plagiarism will be treated as an academic misconduct for which provisions stipulated in the Student Code of Conduct should apply. ? Based on the lecture (Chapter5 Engineering Standards and Professional Societies): Write an essay including both Part A and Part B by following APA Formatting and Style Guide for your report. Main body of report can be about 1-3 pages (excluding cover page, table of contents and references.): PART-A: "The purpose of using Engineering Standards" give detail information. PART-B: What are the typical Engineering Standards (provide names and numbers) required for a car design and manufacturing that Mechanical Engineers can use while working on an automotive project. ? AUM • Handwriting and Al are not acceptable due to requirement of similarity check in Turnitin. ????? ????? ?????? ???????????? 2 American University of The Middle East 3 4 Grading Scheme Item 1 Submission shall be uploaded to Moodle. You can use any APA style cover sheet and delete the questions/text of this document in your report to avoid similarity. Try to include references from AUM Online Library also. Quality and effectiveness of text (relevance with the topic, stating the point, clear ideas and expressions, quality of references etc.) Completeness of Text (required sections of Essay exists) Formatting in APA style and additional formatting instructions given in this document Grammar and typing Similarity and Al check (penalty points to be deducted) Total Weight 70% 20% 10% 100%

CVEN 1201: Intro to Civil Engineering Homework 3 Fusion 360 1 Design Objective: Design a 3D printed PLA plastic table structure that can support one large coffee mug weighing 1.5 pounds. The base of the coffee mug has a 3.25-inch bottom diameter. Video Lectures: View Lectures 1-9 Assignment Deliverables: Draw a three-dimensional table structure that is no more than 5 inches in width and length and is at a minimum, 3 inches in height. Deliverable 1: Define and create three different sub-components (can be any geometry within the constraints described above; you are not required to copy the design shown above; for purposes of explanation only) o Table Legs ","? o Table Top o Table Undermount Support • Deliverable 2: Assemble the table o Using the assemble command, attach each sub-component to each other to assemble the table structure 3

From ESS, at P-8 Mpa at T-480°C h?=3349.52 KJ/kg, S1-S2= 6.6610KJ/kg-K At condenser Pressure, P=.00 Mpa hf=173.85hfg=2403.1, Sg-8.2287, SF0.5926 Quality, x is given by S? - Sf Sa-Sr x = X= 6.6586 0.5926 8.2287 0.5926 x=0.7943 h2s hf+x*hfg=173.88+0.7943*2403.1=2083.37KJ/kg h?=2083.37KJ/kg h3=173.85KJ/kg h4s-h3+0 (P1-P2)=173.88+ 1.0084 (8-.008)-181.91 KJ/kg h4=181.91 KJ/kg Condenser Pressure (KPa) 8 10 15 30 50 Wnet qin Wt (KJ/kg) Wp (KJ/kg) gout (KJ/kg) (KJ/kg) (KJ/kg) (KJ/kg) 1266.16 8.06 1258.10 3167.62 1909.52 1240.20 8.07 1232.12 3149.64 1917.52 1191.55 8.10 1183.45 3115.49 1932.04 1103.64 8.15 1095.49 3052.15 1956.66 1034.64 8.19 1026.46 3000.86 1974.41 efficiency (%) 39.72 39.12 37.99 35.89 34.21

Q1 Section A Complete both questions in this section in the BLUE answer booklet You are using an AISI 4340 (Fe-0.4wt% C+ alloying additions) steel to produce forged/machined ground anchors for a large mobile phone mast. (a) The steel is supplied in the normalised condition. What fraction of the steel do you expect to be austenite, martensite and pearlite? Justify each answer. (5 marks) (b) Upon examination you find the steel is mostly bainite and martensite with a small amount of proeutectoid ferrite. Determine the range of possible cooling rates this material might have experienced? Would the presence of these microconstituents cause you any concern considering the steel will be hot-forged? (5 marks) (c) The steel needs to be processed in the following manner: (i) Hot forge to the basic shape. (ii) Substantial machining to create threads. (iii) Heat treatment and cooling to create a 100% martensite microstructure. (iv) Tempering to modify the toughness. Sketch a time-temperature history that you would use for this process. Focus on specify- ing the temperatures and the required cooling rates for each stage. Clearly indicate where you have had to use your judgement to estimate a value. (5 marks) (d) You decide that the forging should be a dual-phase steel consisting of 50% ferrite and 50% martensite in order to improve the damage resistance of the anchor. What single change could be made to the above process to produce this desired microstructure? Fully explain your reasoning. (5 marks)/n8-iron (BCC) Temperature, T (°C) Ferrite a (BCC) 1600 1400 1200 1000 800 600 400 200 0 Melting point /of pure Fe 1534°C L+8 Peritectic point 0 Fe Austenite Y (FCC) 910°C 0.8 ?+Y 0.035 1 L+Y Liquid, L 2.1 Eutectoid point 2 Eutectic point 3 Ferrite, & + Fe,C Austenite. Y + Fe?C 723°C 4.3 wt% C 4 1147°C Compound, Cementite Fe?C 5 6 7/nTemperature (C) 900 800 700 600 500 400 300 200 100 0 10? M? M? B. Rate (C/s) 20 8 10¹ 10² 10³ time (s) Figure Q1 4 AISI 4340 0.33 0.08 0.023 0.006 104 105/nFORMULAS Emax = VjEj + (1 - V?) Em 1 [r+rs(f ? 2)]¹/2 - agel