ME – 6401 / KINEMATICS OF MACHINERYALL POSSIBLE QUESTIONS

UNIT – I

Topic No

Q.No Questions Marks University References

1. Basic kinematic concepts and definitions1. Define Kinematic link. And write the types 22. Define Kinematic pair and write their types 2 U1; Q.1

U4; Q.11 (a) (i)3. Define Kinematic chain 2 U5; Q. 11 (a)4. Difference between structure and Machine 2 U3; Q.15. Difference between structure and Mechanism 2 U1; Q.26. Define mechanism 2

6B. When a linkage become mechanism 2 U7; Q.27. Write the types of constrained motion 28. Briefly explain the types of kinematic pair 16 or 8 U4; Q.11 (a) (i)

8A. Classify kinematic pairs based on nature of contact.Give example 2 U7; Q.18B. Classify kinematic pair based on degrees of freedom 10 U7; Q.11 (a) (i)

9. Explain different types of Link 8 or 410. What are the types of constrained motions? And define their

types2 or 4 or 8

U3; Q.2 [2 m]U5; Q.2[2 m]

11. Difference between rotational and translation 2 U2; Q.212. Difference between rigid body and resistant body 2 U4; Q.1

2. Degree of freedom13. Degree of freedom of Mechanism. 214. What is meant by spatial mechanism? 2

3. Mobility15. Determine the degree o f freedom for following linkages 2 or 4

or 6 or 8

U5; Q.1U2; Q.11(a)(ii) [6 mark]

15B. Find the degrees of freedom of the mechanism shown in fig 10 U7; Q. 11 (b)(i)

4. Kutzbach criterion, Gruebler’s criterion – Grashof’s Law16. State the Kutzbach’s Criterion. 217. State the Grublers Criterion. 218. Write Grashoff’s law 219. Explain Kutzbach criterion for the mobility of a mechanism with

suitable example4 or 6

19A. Define Grubler’s Criterion for Mechanism 2 U6 Q.1 19B. State the inconsistencies of Grublers criterion 6 U7; Q.11 (b)(ii)

5. Kinematic inversions of four-bar chain and Double Slider Crank Chain20. What is kinematic inversion of mechanism? 2 U2; Q.11(a)

20A. Name any two inversions of mechanism 2 U6; Q.220B. What is inversion nd list its properties 6 U7; Q. 11 (a)(ii)

21. Define double slider crank chain mechanism 222. What are the some important inversions of four chain

mechanism?2

23. Write the different inversion Mechanism 224. Discuss Elliptical trammel 225. Explain the inversions of four bar chain with examples 12 or

16U1; Q.11(a)U5; Q. 11 (a)U3; Q. 11 (b)

25A. Describe with neat sketch, the mechanism obtained by the inversions of 4-bar chain

16 U6; Q.11 (a)

26. Explain the inversions of double slider crank chain with examples 8 or 12 or 16

27. Sketch and explain the Elliptical trammel and Scotch yoke mechanism.

12 or 16

U1; Q.11(b)

28. With the help of a neat sketch explain the working of Oldham’s coupling

8

6. Inversion of slider crank chains and Limit positions29. Define single slider crank chain mechanism 230. Write the different slider crank inversion Mechanism 231. Sketch and explain the inversions of Single-slider crank chain 8 or 12

or 16U2; Q.11(a) (i) U4; Q. 11(a) (ii)

32. Sketch and describe the working of two different t y p e s of quick return mechanisms. Give examples of their applications. Derive an expression for the ratio of times taken in-forward and return s t r o k e for one of these mechanisms.

16 U5; Q. 11 (b)

33. Explain the working a quick return motion mechanism. Also derive an equation for the ratio of time taken for return stroke and forward strokes.

10 or 12

34. With the help of a neat sketch explain the working of Whitworth quick return mechanism

10 or 12

35. Explain the working of two different types of quick return mechanisms. Derive an expression for the ratio of time taken in forward and return stroke for one of these mechanisms.

16 U3; Q. 11 (a)

35A. In a crank and slotted lever quick return motion mechanism, the distance between the fixed centres is 240 mm and the length of the driving crank is 120 mm. Find the inclination of the slotted bar with the vertical in the extreme position and the time ratio of cutting stroke to the return stroke. If the length of the slotted bar is 450 mm, find the length of the stroke if the line of stroke passes through the extreme positions of the free end of the lever

16 U6; Q.11 (b)

7. Mechanical advantage – Transmission Angle36. What is Transmission angle? 237. What is meant by Mechanical advantage 238. Find the maximum and minimum transmission angles for a four

bar chain mechanisms16 U2; Q.11(b) (i)

39. Sketch a four-bar crank rocker mechanism in (1) Maximum transmission angle position and (2) toggle position where mechanical advantage is infinity.

16

8. Classification of mechanisms (Snap-Action Mechanism, Linear Actuators, Fine Adjustments, Clamping Mechanism, Location Devices, Ratches and Escapments)

40. Explain few ratchet and escapement mechanisms 2 U2; Q.141. Write short notes on toggle mechanism 8 U2; Q.11(b) (ii)

9. Classification of mechanisms (Indexing Mechanism, Rocking Mechanism, Reciprocating Mechanism, Straight Line Mechanism)

42. Explain, with a neat sketch, how an offset slider crank mechanism can be used as a quick-return motion mechanism. Derive an expression to find the quick-return ratio

16

43. Explain few indexing mechanisms 8 or 1610. Classification of mechanisms (Six bar step and dell mechanism, Reversing Mechanism, Couplings

and connectors, Sliding Connectors)44. Define Sliding Connectors 8 or 16

11. Description of some common mechanisms – Universal Joint, Straight line generators (Paucellier Mechanism, Watts Mechanism)

45. The ratio between the width of the front axle and that of wheel base of a steering mechanism is 0.44. At the instant when the front inner wheel is turns by 18 degree, what should be the angle be the angle turned by the outer front wheel for perfect steering?

2 U4; Q.2

46. What are straight-line mechanisms? Sketch the Peaucellier straight-line motion mechanism

10

47. Sketch a Hooke's joint and derive the condition for equal speeds of driving and driven shafts

8

12. Description of some common mechanisms –Straight line generators (Steering Mechanism), offset quick return mechanism

48. A Hooke's joint connec t s two shafts w h o s e axes intersect at 1 8 °. The driving shaft rotates at a uniform speed of 210 rpm. The driven shaft with attached masses has a mass of 60 kg and the radius of gyration of 120 mm. Determine the torque required at the driving shaft if a steady torque of 180 Nm resists rotation of the driven shaft and the angle of rotation is 45° and angle between the shafts at which the t o t a l fluctuation of speed of the driven shaft is limited to 18 rpm

16 U4; Q.11 (b)

49. Briefly explain about straight line generators 1650. Explain steering gear & Paucellier mechanisms with neat sketch 8

U7 Apr/May 2016U6 Nov/Dec 2015U5 Apr/May 2015U4 Nov/Dec 2014U3 Apr/May 2014U2 Nov/Dec 2013U1 Apr/May 2013