If D is the diameter of a Pelton wheel and d is the diameter of the jet, then Jet ratio m will be given by 

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MPPGCL JE ME 19 March 2019 Official Paper
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  1. m = d/D
  2. m = D/d
  3. m = 2d/D
  4. m = D/2

Answer (Detailed Solution Below)

Option 2 : m = D/d
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Detailed Solution

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Explanation:

The width of the bucket for a Pelton wheel is generally five times the diameter of the jet.

The depth of the bucket for a Pelton wheel is generally 1.2 times the diameter of the jet.

The number of buckets on the periphery of a Pelton wheel is given by \(\left( {15 + \frac{D}{{2d}}} \right)\) Where D is the pitch diameter of the wheel and d is the diameter of the jet.

Where, 

where m = Jet ratio = D/d

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