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Roll No. Total No. of Pages : 02
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Total No. of Questions : 09
B.Tech. (ME) (2012 Onwards) (Sem.=5)
DESIGN OF MACHINE ELEMENTS-I
Subject Code : BTME-501
M.Code : 70602
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Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
- Answer briefly :
- Define ‘Engineering Design’.
- What do you understand by ‘embodiment design’?
- What human needs require considerations in a design problem?
- Write the difference between ductility and malleability.
- Define ‘factor of safety’.
- Write the classification of joints.
- Write the equation to calculate the shear strength of solid and hollow shaft.
- List the functions of coupling.
- Define a lever.
- Write the classification of flange joints.
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SECTION-B
- Discuss the BIS method of designation of steels.
- Explain the phenomenon of ‘stress concentration’.
- A 50 mm diameter shaft is welded to a flat plate by fillet weld. Determine the size of the weld if the shaft is required to transmit a torque of 1300 Nm. The permissible working shear strength of the weld material is 60 N/mm².
- What is the function of couplings and clutches? How does a coupling differ from a clutch?
- Explain the procedure of designing a fulcrum pin.
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SECTION-C
- A spherical pressure vessel with a 500 mm inner diameter is welded from steel plates of cold drawn C20 steel of ultimate strength 440 N/mm². The vessel is subjected to internal pressure which varies from 2 N/mm² to 6 N/mm². If the reliability of the vessel is 95 % and the required factor of safety is 3, design the vessel for infinite life period.
- Two plates of 6 mm thickness are to be joined by a double -riveted zig-zag lap joint, if the allowable strength of mild steel are st = 100 N/mm², t = 70 N/mm², tcr = 130 N/mm².
- Draw the fatigue curve and discuss its importance in the design of a machine element.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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