2. The curve traced by the end of a thread as it is unwound from a stationary cylinder is known as
Correct : A. Involute
3. The Ackermann steering gear consists of a four bar mechanism with
Correct : E. All four pairs turning
4. In the case of an automobile power is transmitted from the gear box to the differential through
Correct : B. Hooke's joint
5. The linear velocity of a point on a link relative to any other point on the link will be
Correct : B. Perpendicular to the line joining the two points
6. A Peaucellier mechanism has
Correct : B. Eight links
7. Two parallel shafts, the distance between whose axies is small and variable, may be connected by
Correct : D. Oldham's coupling
8. Nominal top width of a B type V-belt is
Correct : D. 17 mm
9. The number of nodes in shaft carrying only tow rotor at the ends will be
Correct : B. One
10. Which of the following gear is not used on non-parallel, non-intersecting shafts?
Correct : A. Bevel
11. In case of helical gears the angle between the plane containing the axes of the gear and plane passing through the pitch point is known as
Correct : B. Helix angle
12. In case of flat belt drive the length of belt in case of
Correct : C. Cross belts depends on the sum of the diameters of pulleys
13. The purpose of providing multiple collars on a flat collar pivot bearing is to
Correct : D. Distribute the axial load because of limiting bearing pressure on a collar
14. In an at tomobile the power is transmitted from gear box to differential through
Correct : B. Hooke's joint
15. In simple harmonic motion the acceleration is proportional to
Correct : A. Displacement
16. Slip in belt drive is
Correct : D. Difference between the linear speed of the rim of pulley and the belt on it
17. Tangential acceleration direction is
Correct : E. Any of (A) and (C)
18. Kinematics of machines deals with
Correct : D. The relative motion between the parts, neglecting the consideration of the force
19. A shaft revolving in a bearing forms a
Correct : B. Lower pair
20. In case of locomotives the percentage of primary forces balanced is generally
Correct : D. 60 to 70 percent
21. The belt drive can transmit maximum power when maximum total tension in belt equals
Correct : C. Thrice the centrifugal tension
22. The function of a governor is
Correct : D. To maintain the speed of an engine within prescribed limits of varying load conditions
23. In case of spur gears the top land is
Correct : E. The surface of the top of the tooth
24. The no of links in Hart mechanism is
Correct : B. 6
25. In a slider crank mechanism for l/r ratio of 4 the percentage of stroke converted by piston corresponding to 90? movement of crank from top centre will be
Correct : B. Less than 50%
26. The key generally used in wrist watches is
Correct : A. Saddle key
27. In case of involute the angular velocity ratio is
Correct : B. Inversely proportional to radius of base circle from which the involute was generated
28. Which one of the following is not a spring controlled governor?
Correct : A. Porter governor
29. The purpose of differential in locmomtive is served by
Correct : B. Taper on wheels
30. The normal at any point of a involute is
Correct : B. Tangent to the circle
31. The number of links in Paucellier mechanism is
Correct : D. 8
32. A point on a link connecting double slider crank chain will trace a (an)
Correct : C. Ellipse
33. The differential gear in the automobiles is used to
Correct : C. Help in turning
34. The abbreviation P.I.V. drive system stands for
Correct : B. Positive Infinitely Variable
35. The Biflar susperision method is used to determine
Correct : D. Moment of inertia
36. A Scott-Russel mechanism consists of
Correct : C. Sliding and turning pairs
37. If three bodies have plane motions, their instantataneous centres
Correct : D. Lie on a straight line
38. The prime circle of a cam is
Correct : A. The smallest circle drawn to the pitch curve from the centre of rotation of curve
39. A pulley in a belt drive acts as a
Correct : A. Rolling pair
40. In the gear box of an automobile, which gear train is used?
Correct : B. Compound gear train
41. The locus of a point one the circumference of a circle which rolls without slipping on a fixed straight line, is known as
Correct : C. Cycloid
42. Stub tooth is
Correct : A. Shorter than standard tooth depth
43. Which of the following road offers maximum resistance to automobiles?
Correct : D. Loose sand
44. In case of worm and worm wheel, the maximum efficiency is obtained when
Correct : C. Either of the worm or worm wheel is a driver
45. In a balancing machine, the units for unbalance measurement are
Correct : E. gm-cm
46. The type of teeth used on a gear used in sugar crushing is
Correct : D. Cycloidal
47. In a pin jointed mechanism, the line of thrust on a link is
Correct : D. All the above
48. In automobiles, Hooke's joint is used between
Correct : C. Gear box and differential
49. A pair is termed as a higher pair when relative motion between two elements of the pair is
Correct : B. rolling only
50. The swaying couple in a locomotive is due to
Correct : C. partial balancing
51. Bearing suitable for fluctuating loads is
Correct : B. Needle roller bearing
52. Radial distance from the top to the pitch circle for a tooth is known as
Correct : C. addendum
53. Higher pressure angle results in
Correct : E. Wider base and stronger teeth
54. In a radial cam with a roller on follwer the prime circle can be defined as
Correct : A. the smallest circle tangent to the pitch curve
55. Identify the incorrect statement in case of cycloidal gears
Correct : D. Interference exists
56. Which one of the following is not applicable to involute profile
Correct : E. The pitch diameters of mating involutes are inversely proportional to their base circle diameters