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?

Option 2 : 1 and 3

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.