Answer / champak das

1) . mohr circle is used to find?

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2) What wil happen to height of a capillary tube ?

a) increase with increase in diametre
b) decrease with increase in diametre
c) increase with increase in specific weight
d) decrease with increase in specific weight .

3) Specific speed of turbine signifies

a) rotational speed
b) head
c) flow rate
d) some other option

4. Power of a belt is givn by ?

a) mass
b) velocity
c) arc
d) all the above

5. At what temperature celsius and foreignheat is equal ?

answer. -40

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6. Slenderness ratio of a mild steel is ?

a) >80
b) <80
c) >90
d) <90

7. Magnet is made of which iron ?

8. Which is weakest iron ?

a) spring
b) bolt
c) some other options [sorry yaaad nahin]

9. Magnet north pole represents which direction ?


10. Speriodizing is a type of which process ?

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11. Normaling is done at ?

a) above crystaline temperature with quenchng of oils
b) below crystaline temperature

12. Rivets are made by which process ?

a) extrusion
b) cold heating
c) forging

13. Why mercury donot stick to the tube ?

a) cohesive force>adhesive force
b) cohesive force <adhesive force
c) cohesive force =adhesive force

14. Why cage is provided in bearing in between the balls ?

15. Wear allowance on go no go is for which end ?

a) go
b) no go

16. If area, length, diametre, stress are doubled what will happen to the
strain energy?

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17. If a spring of stiffness of k is divided in 4 parts and then joined in
paralell then what wil be the resultant stiffness ?

18. one question on bearing lubrication .

19. How can we increase the pressure angle of a gear ?

20 a) plaster of paris is extracted from bauxite, true / false

Another one same true or false like the above.

21. What is 18-4-1 mild steel?
a) How much composition in 18 ?
b) How much composition in 4 ?
c) How much composition in 1 ?

22. What is the shape of bending moment of cantilever with udl over it?

23. Surface measurement RA is taken in which units?

a) micron
b) mm2
c)don't remember actually.

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24. In which fit clearance will be more for hole and shaft?

a) h6g8
b) h6e8
c) h9f9
d) h9d8

25. If spring is in compressive stresses then major stresses will be ?

26. Velocity ratio of gear wil be equal at which point ?

27. How much is thermal efficiency of internal combustion engine ?

28. Internal spur gear is mass produced by which process ?

29. one question on hooke joint ?

Many more nunerical questions are there and last one aagin true/false.

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