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Priming in a boiler is the

  • A.cracking of the boiler plate along its rivets
  • B.deposition of a hard scale on the tubes
  • C.carrying of water droplets with the steam
  • D.formation of a stable foam on the water surface

Answer: C

Violent boiling, a high water level or a sudden change in load throws water into the steam space, so the steam leaves wet and carries dissolved solids into the plant. Foaming is the related trouble caused by oil and alkali.

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