Copyright reserved | Department of Mechanical Engineering | Semester Test 2 - 2011 | | Manufacturing Systems MVS 311 | Date - 15 April 2011 | Duration – 90 minutes This is an open book examinationInternal examiner: Mr E.T. BrettExternal examiner: Mr. J.J. Pienaar | * Answer ALL THE questions. * State and motivate all assumptions clearly. * Please Note: All questions do not carry the same marks. * This paper consists of 2 pages | | Question One a Establish the initial
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formed the basis of many magnet designs used in magnetic refrigeration prototypes. Magnetic Refrigeration Device Configuration selection:- As mentioned‚ the most consistently reported classification of devices‚ grouped into two types‚ rotary and reciprocating. Thus‚ each type has its advantages and disadvantages. Some of difficulties associated with both design and construction of an AMRR included: Large magnetic forces. Operating frequency.
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navigation‚ search Comparison of displacement and acceleration for a Scotch Yoke compared with a crank and slider The Scotch yoke is a mechanism for converting the linear motion of a slider into rotational motion or vice-versa. The piston or other reciprocating part is directly coupled to a sliding yoke with a slot that engages a pin on the rotating part. The shape of the motion of the piston is a pure sine wave over time given a constant rotational speed. Contents * 1 Applications * 2 Internal combustion
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ABSTRACT Cryogens are effective thermal storage media which‚ when used for automotive purposes‚ offer significant advantages over current and proposed electrochemical battery technologies‚ both in performance and economy. An automotive propulsion concept is presented which utilizes liquid nitrogen as the working fluid for an open Rankine cycle. The principle of operation is like that of a steam engine‚ except there is no combustion involved. Liquid nitrogen is pressurized and then vaporized in
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organisms who are not related. Reciprocal Altruism does not quite work to increase fitness of genes‚ the organisms are manipulated by punishment. If a being takes advantage of the altruistic behavior and gains they uptake without returning or “reciprocating” an altruistic action‚ they can be punished. By the use of reinforcements‚ they are being manipulated to return the favor and keep the continuous cycle of reciprocal altruism moving (Trivers 1971). In addition‚ the concept of indirect reciprocity
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s= piston position ‚ =crank angle‚Vc=clearance volume‚ Vd=dispalcement volume Bore sizes of engines ranges from 0.5m down to 0.5 cm. The ratio of bore to stroke‚B/S for small engines is usually from 0.8 to 1.2. Stroke ratio In a reciprocating piston engine‚ the stroke ratio‚ defined by either bore/stroke ratio or stroke/bore ratio‚ is a term to describe the ratio between cylinder bore diameter and piston stroke. This can be used for either an internal combustion engine‚ where the fuel
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Application From:- VIntukumar.C.Parmar‚ Parmarstreet‚ At&Post–TA-Vagra
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INTERNAL COMBUSTION ENGINES INTERNAL COMBUSTION ENGINES Mihir Sen University of Notre Dame November 11‚ 2009 1/ 55 INTERNAL COMBUSTION ENGINES Outline 1 Outline 2 Basics 3 Classification 4 Terminology 5 Components 6 Operation 7 Thermodynamics 8 Parameters 9 Output 2/ 55 INTERNAL COMBUSTION ENGINES Basics Historical Lenoir‚ 1860: first auto Otto and Langen‚ 1867: efficiency about 11% Diesel‚ by 1892: compression ignition engine 3/ 55 INTERNAL COMBUSTION ENGINES Basics
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ASSIGNMENT 1 Textbook Assignment: “Introduction to the Machinist’s Mate (Surface) Rate” and “Steam Turbines‚” chapters 1 and 2‚ pages 1-1 through 2-32. 1-1. If you are assigned to the M division‚ which of the following terms best describes your rating? 1. General 1-2. A Machinist’s Mate (MM) (Surface) in the M division will most likely maintain which of the following equipment? 4. Propulsion machinery 1-3. As you move up the promotion ladder to MM3 and then to MM2‚ your technical
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1. What civic roles and responsibilities are contemporary museums asked to undertake and what are the future possibilities? Museums and libraries roles in communities have evolved from institutions of scholarly research and focus to centers of cultural enrichment and social engagement. Museums many times are the front doors to communities that serve as centers for public interaction and collective participation in an overall collaborative educational experience. Safe havens for cultural and civic
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