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Question: section c40 marks answer compulsary in this section case study...

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SECTION C-40 MARKS ANSWER COMPULSARY IN THIS SECTION (CASE STUDY)- 20 MARKS EACH 12, a) Find the maximum diameter of hole that can be punch in a M.s. plate 10mm thick having ultimate shear stress of 220 N/mm2. The allowable crushing stress in punch material is 350 N/mm2. b) What is standardization? State any four advantages of standardization? 13 a) State four factors to be taken into consideration while selecting ball bearing b) W hat are the Ergonomic considerations while designing a machine? c) Design a bushed pin type flexible coupling to connect a motor shaft to a pump shaft transmitting 20kW power at 1440 rpm. The allowable shear and crushing stress for steel shafts,keys and pins are 40 MPa and 80 MPa respectively. The allowable shear iron flange is 10 MPa and the allowable bearing pressure for rubber bush is 0.5 Mpa.

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