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Mechanical Engineering Objective Questions { Theory of Machines }

57. The moment on the 'pulley which produces rotation is called
C.Moment of momentum

58. Creep in belt drive is due to
A.Material of the pulley
B.(6) material of the belt
C.Larger size of the driver pulley
D.Uneven extensions and contractions due to varying tension

59. The horse power transmitted by a belt is dependent upon
A.Tension on tight side of belt
B.All of the above.
C.Radius of pulley
D.Speed of pulley

60. The locus of a point on a thread unwound from a cylinder will be
A.A straight line
B.A circle

61. To obviate axial thrust,. following gear drive is used
A.Double helical gears having opposite teeth
B.Double helical gears-living identical teeth
C.Single helical gear in which one of the teeth of helix angle a is more
D.Mutter gears

62. Which of the following is false statement in respect of differences between machine and struiture
A.Machines transmit mechanical work, whereas structures transmit forces
B.In machines, relative motion exists between its members, whereas same does not exist in case of structures
C.Machines modify movement and work, whereas structures modify forces
D.Efficiency of machines as well as structures is below 100%

63. Typewriter constitutes

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