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One kg of steam sample contains 0.4 kg dry steam, it’s dryness fraction is

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  1. 0.4
  2. 0.6
  3. 4/14
  4. 0.4 × 0.6

Answer (Detailed Solution Below)

Option 1 : 0.4
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Detailed Solution

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Explanation:

  • Dryness fraction is defined as the ratio of the mass of dry steam and the combined mass of dry steam & mass of water vapour in the mixture. It is denoted by x.

  • For saturated liquid x = 0
  • For saturated vapour x = 1
  • The value of the dryness fraction lies between 0 and 1.

Calculation:

Given:

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