The principle of direct and reverse cranks is readily applicable to _____.

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SSC JE ME Previous Paper 5 ( Held on: 2 March 2017 Morning)
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  1. Primary balance
  2. Secondary balance
  3. Balancing of in-line engines
  4. Partial primary balance

Answer (Detailed Solution Below)

Option 4 : Partial primary balance
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Concept:

The method of direct and reverse cranks is used in balancing of radial or V-engines, in which the connecting rods are connected to a common crank. Since the plane of rotation of the various cranks (in radial or V-engines) is the same, therefore there is no unbalanced primary or secondary couple. It is used for partial balancing of primary and secondary forces.

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