Engineering Mechanics - Jorhat Engineering College

1 LABORATORY MANUAL Engineering Mechanics (ME-21L) Department of mechanical Engineering Jorhat Engineering College Jorhat 785007 (Assam) (ii) College VISION AND MISSION Vision: To develop human resources for sustainable industrial and societal growth through excellence in technical education and research. Mission: 1. To impart quality technical education at UG, PG and PhD levels through good academic support facilities. 2. To provide an environment conducive to innovation and creativity, group work and entrepreneurial leadership. 3. To develop a system for effective interactions among industries, academia, alumni and other stakeholders. 4. To provide a platform for need-based research with special focus on regional development. DEPARTMENT VISION AND MISSION Vision: To emerge as a centre of excellence in mechanical Engineering and maintain it through continuous effective teaching-learning process and need-based research.

2 Mission: M1: To adopt effective teaching-learning processes to build students capacity and enhance their skills. M2: To nurture the students to adapt to the changing needs in academic and industrial aspirations. M3: To develop professionals to meet industrial and societal challenges. M4: To motivate students for entrepreneurial ventures for nation-building. (iii) Program Outcomes (POs) Engineering graduates will be able to: 1. Engineering knowledge: Apply the knowledge of mathematics, science, Engineering fundamentals, and an Engineering specialization to the solution of complex Engineering problems. 2. Problem analysis: Identify, formulate, review research literature, and analyze complex Engineering problems reaching substantiated conclusions using first principles of mathematics, natural sciences, and Engineering sciences.

3 3. Design/development of solutions: Design solutions for complex Engineering problems and design system components or processes that meet the specified needs with appropriate consideration for the public health and safety, and the cultural, societal, and environmental considerations. 4. Conduct investigations of complex problems: Use research-based knowledge and research methods including design of experiments, analysis and interpretation of data, and synthesis of the information to provide valid conclusions. 5. Modern tool usage: Create, select, and apply appropriate techniques, resources, and modern Engineering and IT tools including prediction and modelling to complex Engineering activities with an understanding of the limitations. 6. The engineer and society: Apply reasoning informed by the contextual knowledge to assess societal, health, safety, legal and cultural issues and the consequent responsibilities relevant to the professional Engineering practice.

4 7. Environment and sustainability: Understand the impact of the professional Engineering solutions in societal and environmental contexts, and demonstrate the knowledge of, and need for sustainable development. 8. Ethics: Apply ethical principles and commit to professional ethics and responsibilities and norms of the Engineering practice. 9. Individual and team work: Function effectively as an individual, and as a member or leader in diverse teams, and in multidisciplinary settings. 10. Communication: Communicate effectively on complex Engineering activities with the Engineering community and with society at large, such as, being able to comprehend and write effective reports and design documentation, make effective presentations, and give and receive clear instructions. 11. Project management and finance: Demonstrate knowledge and understanding of the Engineering and management principles and apply these to one s own work, as a member and leader in a team, to manage projects and in multidisciplinary environments.

5 12. Life-long learning: Recognize the need for, and have the preparation and ability to engage in independent and life-long learning in the broadest context of technological change. (iv) Programme Educational Objectives (PEOs) The Programme Educational Objectives of Department of mechanical Engineering are given below: PEO1: Gain basic domain knowledge, expertise and self-confidence for employment, advanced studies, R&D, entrepreneurial ventures activities, and facing challenges in professional life. PEO2: Develop, improve and maintain effective domain based systems, tools and techniques that socioeconomically feasible and acceptable and transfer those technologies/developments for improving quality of life. PEO3: Demonstrate professionalism through effective communication skill, ethical and societal commitment, team spirit, leadership quality and get involved in life-long learning to realize career and organisational goal and participate in nation building.

6 Program Specific Outcomes (PSOs) The programme specific outcomes of Department of mechanical Engineering are given below: PSO1: Capable to establish a career in mechanical and interdisciplinary areas with the commitment to the society and the nation. PSO2: Graduates will be armed with Engineering principles, analysing tools and techniques and creative ideas to analyse, interpret and improve mechanical Engineering systems. Course Outcomes (COs) At the end of the course, the student will be able to: CO1 Verify law of Force Polygon and law of Moments using Force Polygon and bell crank lever apparatus and also study Parallel Force apparatus. (Simply supported type). CO2 Determine mechanical advantage, Velocity ratio and efficiency of a screw jack. CO3 Evaluate co-efficient of friction between trolley (slider) and an inclined plane.

7 Mapping of COs with POs: COs PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 PSO1 PSO2 CO1 3 3 1 2 1 1 1 2 CO2 3 2 1 1 1 1 1 1 1 CO3 3 2 1 1 1 1 1 (v) STUDENT PROFILE NAME : ROLL NUMBER : SECTION : SEMESTER : 2nd Semester YEAR : 2016 PERFORMANCE RECORD EXP. NO. TITLE OF EXPERIMENT REMARKS / GRADE 1 Law of Polygon Of Forces Apparatus 2 Parallel Force System Apparatus 3 Rolling Friction Apparatus 4 Square Threaded Screw Jack 5 Bell Crank Lever 6 Equilibrium Forces Apparatus 7 Sliding Friction Apparatus OFFICE USE Checked By : Overall Grade / Marks : Signature of Teacher : (1) Jorhat Engineering College Engineering Mechanics Lab Experiment No. 1 TITLE: Law of Polygon of Forces OBJECTIVE: To verify the law of polygon of forces for a numbers of coplanar forces in equilibrium. Figure : Labeled diagram of the apparatus THEORY: The Law of Polygon of Forces states that if any number of coplanar concurrent forces can be represented in magnitude and direction by the sides of a polygon taken in order; then their resultant will be represented by the closing side of the polygon taken in opposite order.

8 Also, if the forces form a closed polygon, then the system is in equilibrium. Fig. and shows a system of five forces 1, 2, 3, 3 and 5. The forces are forming a closed polygon in the first figure, hence they are in equilibrium. In the second figure, the system is not in equilibrium, and the closing side, shown by dotted line, denotes the Resultant of the force system. (2) Jorhat Engineering College Engineering Mechanics Lab Figure Figure Figure : Experimental setup in the lab (3) Jorhat Engineering College Engineering Mechanics Lab PROCEDURE: 1. Set up the apparatus provided after measuring and recording the weights of the pans. 2. Put different weights on the pan (W1, W2, W3, W4 and W5) and let the system come to rest and then note their values. 3. Now, fix a sheet of paper on the drawing board and mark the central point (point where the strings meet and the directions of the string with pencil.)

9 4. Remove the paper from the drawing board and draw the lines of actions of the forces. 5. Draw the force polygon by representing W1, W2, W3, W4 and W5 in magnitude and direction. 6. The polygon may not be closed. The error (unclosed distance of the polygon) is due to error in experimentation and the friction in various moving parts. 7. Repeat the procedure 4 times and complete the experiment. DATA PROVIDED: The weight of the Pan = gm TABULATION OF RESULTS: Observation Number Weights in different pans (gm) Resultant (Error) (gm) Analytical Method Graphical Method 1 2 3 4 CALCULATIONS: For each observation, first do the Analytical Calculation, and then find the result using Graphical Method. For graphical method, draw one Space Diagram and one Vector Diagram. Do mention the Scale for the Vector Diagram.

10 Do attach the Sheet of Paper, on which the experiment is performed, with this journal. (4) Jorhat Engineering College Engineering Mechanics Lab Observation 1 (5) Jorhat Engineering College Engineering Mechanics Lab Observation 2 (6) Jorhat Engineering College Engineering Mechanics Lab Observation 3 (7) Jorhat Engineering College Engineering Mechanics Lab Observation 4 (8) Jorhat Engineering College Engineering Mechanics Lab Exp. No. 1 Title: Law of Polygon of Forces Name of Student: Roll No.: Date of Experiment: Date of Submission: Signature of Teacher SEAL with Date of Check (9) Jorhat Engineering College Engineering Mechanics Lab Experiment No.