QnA : Theory of Machine

QnA of Theory of Machine :

1. Inversion of a mechanism is -

One link of kinematic chain is fixed .

2. For simple harmonic motion of a cam follower , a cosine curve represents -

Acceleration Diagram .

3. Hartnett governer could be classified under the head of  spring controlled .

Spring controlled - Hartness , Hartung , Pickering , Wilson - Hartness governer .

4. Normally cam moves with  constant velocity .

5. A simple mechanism has four links .

6. When the speed of governer increases then  height of governer decreases but radius of rotation increase .

7. The purpose of flywheel in an IC Engine is to reduce the vibration in the engine .

8. The pitch point on a cam exiest on - point on cam pitch curve at which pressure angle is maximum .

9. The stress in disc type flywheel as compared to rim type flywheel is greater .

10. The contact between cam and follower is to form a higher pair .

11. Governer is used in automobile to -

control SN .

12. In order to Balanced the reciprocating masses - Primary and secondary forces must be balanced .

13. Which one is a greavity controlled type governer ?

Watt governer 

14. Governer sensitivity is the ratio of range of speed to the mean speed .

15. Spring stiffness is load required to produce unit deflection .

16. In gear drive , module is equal to 1/ diametral pitch .

17. A screw is specified by major dia × pitch .

18. Rivets are made of  ductile material .

19. Lewis equation in spur gear design is applied to weaker of the pinion or gear .

20. Weakest section of a diamond riveting is the section which passes through one rivet hole of the end row .

21. A cylinderical vessel was sealed in summer . What is likely to happen to it in winter ?

Buckle and collapse .

22. In involute gear , the normal to the involutes is tengent to the Base circle .

23. To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting ,use worm gear .

24. If gear and pinion both are made of the same material then load transmitting capacity is decided by - pinion .

25. Through of cam is the maximum distance of follower from - Base circle .

26. Cam size depends upon - Base circle .