Theory of Machines

121. The tendency of a body to resist change from rest or motion is known as

1. mass
2. friction
3. inertia
4. resisting force
5. resisting torque.

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122. The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is

1. flexible coupling
2. universal coupling
3. chain coupling
4. Oldham's coupling
5. American coupling.

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123. The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as

1. turning pair
2. rolling pair
3. sliding pair
4. spherical pair
5. lower pair,

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124. The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

1. 0, and more than co2r
2. 0, and less than coV
3. 0, 0
4. cor, 0
5. none of the above.

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125. The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

1. joining the corresponding points
2. perpendicular to line as per (a)
3. not possible to determine with these data
4. at 45° to line as per (a)
5. none of the above.

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126. Throw of a cam is the maximum distance of the follower from

1. base circle
2. pitch circle
3. root circle
4. prime circle
5. inner circle.

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127. TJie horse power transmitted by a belt is dependent upon

1. tension on tight side of belt
2. tension on slack side of belt
3. radius of pulley
4. speed of pulley
5. all of the above.

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128. To obviate axial thrust, following gear drive is used

1. double helical gears having opposite teeth
2. double helical gears having identical teeth
3. single helical gear in which one of the teeth of helix angle a is more
4. mutter gears
5. none of the above.

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

1. spur gear
2. spiral gear
3. bevel gear
4. worm gear
5. crown gear.

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130. Transmission of power from the engine to the rear axle of an automobile is by means of

1. compound gears
2. worm and wheel method
3. Hooke's joint
4. crown gear
5. bevel gears.

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