Ans: a, 124. Ans: a, 127. Ans: b, 118. The devices used for preventing the creep in a railway track are known as, The devices used for preventing the creep in a railway track are known as Anchor or Anti-creepers, a) Steel sleepersb) Wooden sleepersc) Concrete sleepersd) C.I Sleepers, b) Wooden sleepers. Ans: d, 138. (C) Rails fasteners (D) None of these. Ans: a, 123. The connecting rod bolts are tightened up so that tightening stress (a) is just sufficient to hold parts together (b) approaches yield point (c) is 50% of yield point (d) is about yield point divided by safety factor (e) none of the above. When a close coiled helical spring is compressed, its wire is subjected to (a) tension (b) shear (c) compression (d) all of the above (e) none of the above. They will take (a) same time to reach earth (b) times proportional to weight to reach earth (c) times inversely proportional to weight to reach earth (d) unpredictable (e) none of the above. The machine operates... LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. > The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is (a) larger (b) smaller (c) equal (d) larger/smaller depending on diameter of spring coil (e) unpredictable. Aircraft body is usually fabricated by, 112. I.S. Quality, Engineering, & Lab Services > Ans: a, 105. Introduction to Slotting Machine : The connecting rod bolts are tightened up so that tightening stress, (a) is just sufficient to hold parts together, (d) is about yield point divided by safety factor, 135. Spikes are used for holding rails to the ___ sleepers. Required fields are marked *. They will take, (b) times proportional to weight to reach earth, (c) times inversely proportional to weight to reach earth, (a) direction of twist of wires in strands is opposite to the direction of twist of strands, (b) direction of twist of wires and strands are same, (c) wires in two adjacent strands are twisted in opposite direction, 124. Home Ans: e, 115. Ans: c, 136. If What you looking for is not here, you may send a request to modify articles, Notes, and Content modification, Feedback, Suggestions here (Team will reply as early as Possible ):  Contact Form or Using Whatsapp, © 2020 Copyright Learn Mechanical Engineering, Machine Design MCQ Objective Question and Answers Part 4, 101. Changing this settings will alter the functionality of this site and your user experience could be diminished. Sign up to receive special offers and promotions from Fastenal. 135. The Fastenal … We're also adept at deriving necessary information that's needed in industry but not addressed in the fastener standards -- Concepts like installation torque, re-use of fasteners, life expectancy of plated or coated fasteners. Ans: a, 129. Machine Design Notes , article , Interview Que. We're here to help you make sure you have the correct product for your application. Our knowledge of the industry standards, fastener technology, and fastener materials ensures an accurate and timely response to virtually any fastener related question. Basic hole is one (a) whose upper deviation is zero (b) whose lower deviation is zero (c) whose lower as well as upper deviations are zero (d) does not exist (e) none of the above. Most fasteners are made to comply with one or more standards. If a spring is cut down into two springs, the stiffness of cut springs will be (a) half (b) same (c) double (d) unpredictable (e) none of the above. If two springs are in parallel then their overall stiffness will be, (a) the oil film pressure is generated only by the rotation of the journal, (b) the oil film is maintained by supplying oil under pressure, (c) do not require external supply of lubricant, 115. If a spring is cut down into two springs, the stiffness of cut springs will be, 111. 13. In hydrodynamic bearings (a) the oil film pressure is generated only by the rotation of the journal (b) the oil film is maintained by supplying oil under pressure (c) do not require external supply of lubricant (d) grease is used for lubrication (e) none of the above. The connecting rod bolts are tightened up with initial tension greater than the external load so that (a) joint may not open up (b) bolts are weakest elements (c) the resultant load on the bolt would not be affected by the external cyclic load (d) bolts will not loosen during service (e) none of the above. Oil in journal bearing should be applied at the point where load is (a) nil or lightest (b) maximum (c) average (d) any one of the above (e) unpredictable. Ans: c, 126. The shock absorbing capacity of a bolt can be increased by (a) tightening it properly (b) increasing shank diameter (c) grinding the shank (d) using washer (e) making shank diameter equal to core diameter of thread. Cookies are not used for the processing, collection or storage of personal data under any circumstances. Keep me signed in (Uncheck when using a shared computer), or Save my name and email in this browser for the next time I comment. Form coefficient of spring is (a) ratio of coil diameter to wire diameter (b) load required to produce unit deflection (c) its capability of storing energy (d) concerned With strength of wire of spring (e)  nothing Ans: c, 106. Mechanical MCQ Objectives Question and Answers, Technical Mechanical Interview Question and Answers. Fixtures & Fastening – MCQ. But considering that the Industrial Fasteners Institute (IFI) book (the "Bible" of fastener standards) weighs over 7 pounds, it's impossible to preemptively address all potential standard-related questions. Allen bolts are (a) self locking bolts (b) designed for shock load (c) used in aircraft application (d) provided with hexagonal depression in head (e) uniform strength bolts. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately. Three different weights fall from a certain height under vacuum. Basic shaft is one (a) whose upper deviation is zero (b) whose lower deviation is zero (c) whose lower as well as upper deviations are zero (d) does not exist (e) none of the above. Whether any core is required in wire ropes, 127. When a close coiled helical spring is compressed, its wire is subjected to, 109. link to Hydraulic seals - Definition, Types, Diagram , Function, Failure, Application, link to Slotter Machine - Types, Parts, Operations, Diagram, Specification. Oil in journal bearing should be applied at the point where load is, (d) grease required to be applied after some intervals, 122. Ans: c, 120. (d) provided with hexagonal depression in head, 133. Your email address will not be published. Ans: c, 137. Fastenal Engineering > Keys are used to fix rails to chair on _____ sleepers. Ans: a, 128. Most fasteners are made to comply with one or more standards. Ans: b, 130. 26 which of the following community are skilled forest cutters? The connecting rod bolts are tightened up with initial tension greater than the external load so that, (c) the resultant load on the bolt would not be affected by the external cyclic load, 136. If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited, 137.

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