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Match the following Types of mechanism Motion achieved P. Scott Russel mechanism 1. Intermittent motion Q. Geneva mechanism 2. Quick return motion R. Off set slider crank mechanism 3. Simple harmonic motion S. scotch Yoke mechanism 4. Straight line motion
Which of the following are associate with the Ackerman steering mechanism used in automobiles? 1) Has both sliding and turning pairs 2) Less friction and hence long life 3) Mechanically correct in all positions 4) Mathematically not accurate except in three positions 5) Has only turning pairs 6) Controls movement of two front wheels
Which of the following are associated with Ackerman steering mechanism used in automobiles? 1. Has both sliding and turning pairs 2. Less friction and hence long life 3. Mechanically correct in all positions 4. Mathematically not accurate except in three positions. 5. Has only turning pairs 6. Controls movement of two front wheels
Which of the following are the inversions of double slider crank chain? 1. Oldhan coupling 2. Whitworth quick return mechanism 3. Beam engine mechanism 4. Elliptical Trammel mechanism The correct answer codes are
In Whitworth quick return motion mechanism, the driving crank is under an accelerated motion
For a Whitworth quick return motion mechanism β = 110°. Find the ratio of time of cutting stroke to time of return stroke.
For a Whitworth quick return motion mechanism α = 200°. Find the ratio of time of cutting stroke to time of return stroke.
A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence - first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below. Job A B C D E F G H Turning (minutes) 2 4 8 9 7 6 5 10  Grinding (minutes)  6 1 3 7 9 5 2 4 If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is
The figure shows a mechanism with 3 revolute pairs (between the links 1 and 2, 2 and 3, and 3 and 4) and a prismatic pair (between the links 1 and 4). Which one of the four links should be fixed to obtain the mechanism that forms the basis of the quick-return mechanism widely used in a shaper?
Which of the below are inversions of slider crank mechanism?
1. Oscillating cylinder engine mechanism
2. Toggle mechanism
3. Radial cylinder engine mechanism
4. Quick return mechanism