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Superheated steam is less effective than saturated steam because it

  • A.corrodes instruments on contact
  • B.behaves like hot dry air and does not condense readily
  • C.cannot reach a temperature above 100 degrees
  • D.condenses too quickly to transfer heat

Answer: B

Killing depends on steam condensing on the load, releasing its latent heat and wetting the surface. Steam heated beyond saturation stays gaseous, so it acts as dry heat and would need far higher temperatures and times.

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