Solved question paper for DME May-2023 (B-TECH 5th)
Solved Question Paper
Design of machine elements-1 May-2023
PTU • B-TECH • Mechanical Engineering • 5th • May-2023
design of machine elements-1 previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program in the Mechanical Engineering stream, 5th semester. This section makes it easier to browse subject-wise old question papers for design of machine elements-1, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for design of machine elements-1 previous year question paper while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.
These Questions are downloaded from www.brpaper.com. You can also download previous years question papers of 10th and 12th (PSEB & CBSE), B-Tech, Diploma, BBA, BCA, MBA, MCA, M-Tech, PGDCA, B-Com, BSc-IT, MSC-IT.
Solved Questions
Solved-
Define the term shearing.Very Short Answer 2 Marks May-2023 • PTU B-TECH
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Define the term endurance limit.Very Short Answer 2 Marks May-2023 • PTU B-TECH
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Define the terms bearing - characteristic number and bearing modulus for journal bearing.Very Short Answer 2 Marks May-2023 • PTU B-TECH
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What is rated life of a ball bearing?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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What are the advantages of worm gear drive?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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What is creep in belts?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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What is the objective of snapping of leaf spring?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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Why is heat dissipation necessary in clutches?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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What are the advantages of disk brakes over drum brakes?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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What is leg and throat thickness of a fillet weld?Very Short Answer 2 Marks May-2023 • PTU B-TECH
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Explain the procedure used to design a machine element.Long Answer 8 Marks May-2023 • PTU B-TECH
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Determine the thickness of a 120 mm wide uniform plate for safe continuous operation if the plate is to be subjected to a tensile load that has a maximum value of 250 kN and a minimum value of 100 kN. The properties of the plate material are as follows: Endurance limit stress = 225 MPa, and Yield point stress = 300 MPa.
The factor of safety based on yield point may be taken as 1.5.Long Answer 8 Marks May-2023 • PTU B-TECHExisting answers are stored as HTML; you can edit directly without converting to Markdown.
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Find the diameter of a solid steel shaft to transmit 20 kW at 200 r.p.m. The ultimate shear stress for the steel may be taken as 360 MPa and a factor of safety as 8. If a hollow shaft is to be used in place of the solid shaft, find the inside and outside diameter when the ratio of inside to outside diameters is 0.5.Long Answer 8 Marks May-2023 • PTU B-TECH
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Dec 2024 Find the diameter of a solid steel shaft to transmit 20 kW at 200 r.p.m. The ultimate shear stress for the steel may be taken as 360 MPa and a factor of safety as 8.
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Explain the procedure used to design a chain drive.Long Answer 8 Marks May-2023 • PTU B-TECH
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A single plate clutch, effective on both sides, is required to transmit 25 kW at 3000 r.p.m. Determine the outer and inner diameters of frictional surface if the coefficient of friction is 0.255, ratio of diameters is 1.25 and the maximum pressure is not to exceed 0.1 N/mm2. Also, determine the axial thrust to be provided by springs. Assume the theory of uniform wear.Long Answer 8 Marks May-2023 • PTU B-TECH
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Design a journal bearing for a centrifugal pump from the following data : Load on the journal = 20,000 N; Speed of the journal = 900 r.p.m.; Type of oil is SAE 10, for which the absolute viscosity at 55°C = 0.017 kgm/s; Ambient temperature of oil = 15.5°C; Maximum bearing pressure for the pump = 1.5 N/mm2. Calculate also mass of the lubricating oil required for artificial cooling, if rise of temperature of oil be limited to 10°C. Heat dissipation coefficient = 1232 W/m2/°C.Long Answer 8 Marks May-2023 • PTU B-TECH
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A spur gear drive is required to transmit a maximum power of 22.5 kW. The velocity ratio is 1:2 and r.p.m. of the pinion is 200. The approximate centre distance between the shafts may be taken as 600 mm. The teeth has 20° stub involute profiles. The static stress for the gear material (which is cast iron) may be taken as 60 MPa and face width as 10 times the module. Find the module, face width and number of teeth on each gear.Long Answer 8 Marks May-2023 • PTU B-TECH
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Design a bushed-pin type of flexible coupling to connect a pump shaft to a motor shaft transmitting 32 kW at 960 r.p.m. The overall torque is 20 percent more than mean torque.Long Answer 8 Marks May-2023 • PTU B-TECH
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The allowable shear and crushing stress for shaft and key material is 40 MPa and 80 MPa respectively.Long Answer 8 Marks May-2023 • PTU B-TECH
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The allowable shear stress for cast iron is 15 MPa.Long Answer 8 Marks May-2023 • PTU B-TECH
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The allowable bearing pressure for rubber bush is 0.8 N/mm^2.Long Answer 8 Marks May-2023 • PTU B-TECH
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The material of the pin is same as that of shaft and key.Long Answer 8 Marks May-2023 • PTU B-TECH
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FAQ
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Answers about this subject, solved papers, and preparation.
01 Where can I find design of machine elements-1 previous year question papers for Bachelor of Technology Mechanical Engineering, 5th semester?
This page lists design of machine elements-1 question papers uploaded for Punjab Technical University Bachelor of Technology Mechanical Engineering, 5th semester, organized for subject-wise browsing where available.
02 Are these official Punjab Technical University question papers?
BRpaper is not the official website of Punjab Technical University. These papers are shared for reference and revision purposes only and are not official university material.
03 How can previous year design of machine elements-1 papers help in exam preparation?
Reviewing past papers can help you understand how questions are typically framed, notice commonly repeated topics, and get a sense of the exam pattern before your own exam.
04 What kind of topics does design of machine elements-1 usually cover?
The question papers here relate to the official design of machine elements-1 syllabus set by the university for this course and semester.
05 Does this page include a design of machine elements-1 previous year question paper or solved answers?
This page focuses on providing access to the previous year question papers themselves. A separate question bank or solved answers may not be available for every paper.
06 Can I find papers for other subjects in the same Bachelor of Technology Mechanical Engineering?
Yes, BRpaper organizes papers by university, course, stream, and semester, so you can browse other subjects within the same Punjab Technical University Bachelor of Technology Mechanical Engineering.