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Which of the following statements are correct?

Consider the following statements: A splined shaft is used for

1. transmitting power

2. holding a flywheel rigidly in position

3. moving axially the gears mounted on it

4. mounting V-belt pulley on it

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  1. 2 and 4
  2. 1 and 3
  3. 1 and 4
  4. 3 and 4

Answer (Detailed Solution Below)

Option 2 : 1 and 3
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Detailed Solution

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Explanation:

Splines:

  • Splines are keyways, which are made integral with the shaft.
  • They are used when there is a relative axial motion between the shaft and the hub.
  • The gear shifting mechanism in automobile gearboxes requires such types of constructions.
  • Spines are cut on the shaft by milling and the hub by broaching
  • A splined connection, with straight splines, is shown in the figure below:  

  • It provides the flexibility of axial movement of the hub while transmitting torque between clutch and flywheel and transmissions with the help of splines.
  • Simultaneously, splines allow axial movement of clutch for the disengagement with flywheel so that transmission stops in gear shift mechanism in the automobile gearboxes.

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