JNTUK 3-1 Design Of Machine Members-2 online bits (DMM-II)

Design Of Machine Members-2 online bits

DESIGN OF MACHINE MEMBERS-2 ONLINE BITS MID-1 JNTUK R16

1. Which of the following assumption is correct in case of design of curve bear – The
material of the beam does not. obeys Hooks law
2. The best method for making threads on a bolt is – rolling
3. What is the relation between tight side and slack side tor a flat belt? – (Tight side /
slack side)=eμβ

4. The suitable material for belt in agricultural machinery is – Rubber
5. Which of the lever always reduces the force applied – Lever of the second order
6. Cup is provided in screwjack – To prevent rotation of load
7. Rankins theory is used for – Brittle materials
8. In a horizontal flat belt drive, it is customary to use – top side of belt as slack side
9. Which one of the following is the value of helix angle for maximum efficiency c square
threaded screw? – 45°-(Ø/2)
10. The effort arm on a lever always goes from – effort to the fulcrum
11. Which of the following type of gears are free from axial thrust? – Herringbone gears
12. The bending stress induced in a beam is – Maximum at the farthest fiber from
neutral axis and zero at. the neutral
13. Preliminary design of spur gear using lewis equation is based on – Bending
14. A pulley and belt in a drive form a – Rolling pair
15. A simple flexure formula is used for curved beam for which the radius of curvature is
.. the depth of the beam – more than 5 times
16. The range of helix angle for a double helical gear is – to 45
17. The velocity factor for carefully cut gears operating at velocities up to is equal to
4.5/4.5 + v. – 12.5 m/s
18. The angle through which a gear turns from the beginning of contact, of a pair oi teeth
until the contact arrives at the pitch point, is known as – Angle of approach
19. Which one of the following drives is used for a constant, velocity ratio, positive drive
with large centre distance between the driver and driven shafts? – Chain drive
20. In designing a rocker arm for operating the exhaust valve, the ratio of the length the
diameter of the fulcrum and roller pin is taken as – 1.25
21. Which of the following screw thread is used for lead screw of lathe? – Trapezoidal
threads
22. The most economical section of the crane hook is – Trapezoidal
23. Multiple threads are used for – High efficiency
24. A tack is a gear with – Infinite number of teeth
25. Cup is provided in screwjack – To prevent rotation of load

26. Which of the lever always reduces the force applied? – Lever of the second order

27. In helical gears, the distance between two similar points on the adjacent teeth
measured in a plane perpendicular to tooth, is called – Normal circular pitch
28. A pulley and belt in a drive form a – Rolling pair
29. The coefficient of friction in belt drive depends upon – Materials of belt and pulley
30. Which one of the following is the value of helix angle for maximum efficiency square
threaded screw? – 45°-q>/2
31. The rocker arm in internal combustion engines are of _____ types of level – First type
of levers
32. Velocity factor is used to take care of – Possibility of fatigue failure
33. Which of the following types of gares are free from axial thrust – Herringbone gears
34. The design of the pin of a rocker arm of an I. C. engine is based on – Bearing, shearing
and bending failure
35. An open belt drive is used when – shafts are arranged parallel and rotate in the same
directions
36. The ratio I/y is known as [Where, 1= Moment, of Inertia and y= distance from neutral
axis to the extreme fibre] – Section modulus
37. The ratio of tension of two sides of a rope drive is given by – e
−μØcosecα
38. The bending stress induced in a beam is – Maximum at. the farthest fiber from
neutral axis and zero at the neutral
39. When the belt is transmitting maximum power – The tension in tight side is thrice the
centrifugal tension
40. The maximum bending stress, in a curved beam having symmetrical section, always
occur, at the – Inside fibre
41. The suitable material for belt in agricultural machinery is – Rubber
42. If p. is the actual coefficient of friction in a belt moving in grooved pulley, the groove
angle being 2 a, the virtual coefficient of friction will be – u/sinα
43. The velocity factor for carefully cut. gears operating at velocities up to is equal to
4.5/4.5 + v. – 12.5 m/s
44. which flat belt drive system has two pulleys mounted on driven shaft, and one pulley
on driving shaft? – Fast and loose pulley drive
45. The lever loaded safety valve mounted on boiler is – Second type of lever
46. The wire ropes make contact at – bottom of groove of the pulley
47. When the axes of two shaft are perpendicular and intersecting, use – Bevel gears
48. The form factor of a spur gear depends upon – Number of teeth and the system of
teeth
49. The design of the pin of a rocker arm of an I. C. engine is based on – Bearing, shearing
and bending failure
50. Moment of resistance of a beam – Is equal to safe maximum bending moment to
which it can be subject

DESIGN OF MACHINE MEMBERS-2 ONLINE BITS MID-2 JNTUK R16

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