8/10/2019 Unit Wist 2 Marks

1/5

MARK QUESTIONS

UNITWISE

Unit I. Basics of Mechanisms

1. Define kinematic pair and illustrate any two types of constrained

pair.

2. Explain Kutzbach criterion for the movability of a mechanism

having plane motion.

3. Define the term 'Transmission angle' of a mechanism.

4. Find the degree of freedom of a Cam mechanism with knife-edge

follower

5. List out any four types of kinematic pairs according to the types of

relative motion between them.

6. Define the rubbing velocity at a pin joint

7. What is Grashoff's Law?8. Name some straight line generators commonly used.

9. What is Kinematic chain?

10. Write the Grubler's criteria for plane mechanisms.

11. What is meant by Kinematic Pair?

12. State the difference between mechanism and structure

13. Define the term "Actual Mechanical Advantage".

14. List out the applications of straight line motion mechanisms.

15. What is Kutzbach criterion for planar mechanism?

16. Sketch an exact straight line mechanism with link proportions

8/10/2019 Unit Wist 2 Marks

2/5

Unit-II. Kinematic Analysis

1. Illustrate the space centrode and body centrode.

2. Write the condition for coriolis component of acceleration.

3. State what is meant by 'Coriolis Acceleration'.4. During velocity analysis of a reciprocating engine mechanism.

Explain the method to find the direction of the angular velocity of

the connecting rod?

5. What is Coriolis component of acceleration?

6. Explain the Kutzbach criteria for the mobility of a mechanism

having plane motion

7. What do you mean by Coriolis component of Acceleration?

8. Name some graphical methods used for finding velocity and

acceleration of single slider mechanisms.

9. State Kennedy's Theorem.

10. Write shortly about rubbing velocity.

11. Give the expression for finding the number of instantaneous

centres in a mechanism.

12. Name any two methods of determination of velocity of links of a

mechanism.

13. A slider sliding at 100 mm/sec on a link, which is rotating at 60

rpm, is subjected to Coriolis acceleration. Find its magnitude.

14. Explain normal component of acceleration.

15. State Coriolis law.

8/10/2019 Unit Wist 2 Marks

3/5

Unit III. Kinematics of CAM

1. What are the advantageous of roller follower than knife-edgefollower?

2. Sketch the displacement velocity and acceleration diagram When afollower moves with uniform velocity.

3. What is meant by 'Cycloidal motion' as applied to follower motionof cam mechanism?

4. Describe the method of finding the pressure angle of cammechanism at any intermediate position during the lift of thefollower?

5. Sketch a cylindrical cam, the follower reciprocates in a direction

parallel to the cam axis and with a oscillating follower.6. Distinguish between the roller follower and flat faced follower.7. Define the following terms with respect to cams.

(a) Pressure angle(b) Base circle.

8. Explain the meaning of circular arc cam and tangent cam.9. Mention the different types of Cam and follower.

10. Define pressure angle with respect to Cam. Why maximum pressure angle is not preferred?

11. What are the major types of cams?12. Define Angle of dwell.13. Define "Period of dwell" of a cam.14. Name any two types of cams with specified contours15. What are the classifications of cams based on contact surfaces?16. State the basic requirements for high speed cams.

8/10/2019 Unit Wist 2 Marks

4/5

Unit-IV. Gears

1. State the condition for constant velocity ratio of toothed wheels.

2. Explain the construction of in volute teeth and its advantages

3. Write down the expression for the speed ratio of worm gear drive.4. Sketch a 'Differential' used in automobiles.

5. State the law of gearing.

6. What is reverted gear train?

7. What do you mean by Interference and undercutting?

8. Define the following terms with respect to cams.

(a) Addendum

(b) Dedendum.

9. Define Contact ratio in gears.

10. What do you understand by the term interference as applied to

gear?

11. What is the condition stated by the law of gearing?

12. Enumerate the configuration of a reverted gear train.

13. Classify gears based on type of gearing.

14. What is the role of "Idlers" in gear trains?

15. Define module of gears and its relation to circular pitch.

16. Explain briefly the use of differential in an automobile.

8/10/2019 Unit Wist 2 Marks

5/5

Unit-V. Friction

1. Derive the minimum force required to slide a body on a rough

horizontal surface.

2. Write the equation to determine the efficient of a screw jack3. Briefly explain the term 'Limiting angle of friction'.

4. Distinguish between the functions of clutches and brakes.

5. Define the mechanical efficiency of screw and nut assembly.

6. State the condition for the velocity of the belt for maximum power

transmission.

7. What do you understand "Initial tension of the belt"?

8. Define Co-efficient of friction.

9. What do you mean by Self locking Screws?

10. What is Slip of belt?

11. List down the laws of friction.

12. Compare open-belt drive and crossed-belt drive.

13. Define angle of response.

14. What basic assumption is made in the design of clutch?

15. What are timing belts?

16. Explain briefly significance of friction in braking.