MECH_INT CLASSES B-cabin, Nr. Santoshi Mata Mandir, Naupada, Thane (w) Prof. Avinash
TOM (Part 1)
MOB: 9821854675
MECH_INT CLASSES DATE:.8/10/2011
TIME: 7.30AM-11.30AM
TOM Q-BANK (PART 1) FUNDAMENTALS AND TYPES OF MECHANISMS 1) Define kinematic link and list any 2 links 2) Define sliding pair with an example 3) Define rolling and screw pair with example. Identify the types of pairs in following: Mirror mechanism of vehicle Lead screw of the lathe 4) Define kinematic pair 5) Define higher pair and lower pair with one example each 6) Define and explain constrained motion and its types with diagram 7) Define kinematic chain and Mechanism 8) Define inversion of a mechanism 9) Distinguish between m/c and mechanism 10) List and sketch inversions of four bar chain 11) Draw a neat labelled sketch of single slider crank mechanism 12) Explain with diagram working of crank and slotted quick return mechanism. Why time required for return strike is less than forward stroke? 13) List four inversions of double slider crank chain. Explain any one in detail 14) Draw a neat labelled sketch of Scotch yoke mechanism and state its purpose 15) Explain a double slider crank chain 16) Explain with neat sketch principle of Oldham’s coupling 17) Explain with neat sketch free wheel sprocket mechanism of bicycle 18) Draw a sketch and explain the working principle of Ackerman’s steering gear mechanism VELOCITY & ACCELERATION ANALYSIS: 19) Explain the velocity polygon with its procedure for single slider crank mechanism by using Klein’s constriction 20) The crank of a slider crank mechanism rotates CW at a speed of 300rpm. The crank is 150cm and the connecting rod is 600mm long. Determine: Linear velocity and acceleration of the midpoint of the connecting rod Linear velocity and angular acceleration of the connecting rod at a crank angle 450 from IDC 21) The stroke of a steam engine mechanism is 60cm and the length of the connecting rod is 120cm. Find the velocity of the cross-head and angular velocity of the connecting rod by analytical method when the crank rotates at 180rpm and it is inclined at 200 with IDC CAMS AND FOLLOWER: 22) List the different types of Cams 23) Define pressure angle related to cam 24) State the applications cam and follower 25) List the types of follower 26) Define radial follower with sketch 27) Define pitch curve related to cam 28) Why roller follower is proffered to that of a knife edged follower We cannot direct the winds, but we can adjust the sails
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