Among the following what should not be done while or before using | Filo
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Among the following what should not be done while or before using a clinical thermometer?

  1. Ensure that before use the mercury level is below .
  2. Wash the thermometer with hot water.
  3. Handle the thermometer with care, as you handle any glass articles.
  4. Don't hold the thermometer by the bulb while reading it.
Correct Answer: Option(b)
Solution: (A) The mercury level should be below or , because minimum reading of a clinical thermometer is hence it must be at lowest level to measure the right temperature .
(B) If we wash thermometer with hot water , mercury will expand due to heat given by hot water and will rise to a higher temperature. If the water is very hot , it may result in the damage of thermometer .Hence it must not be done .
(C) It must be handled with care as being made of glass and mercury inside it is poisonous .
(D) If we hold the bulb by our hand , thermometer will take heat from hand and will show a wrong reading hence we should not hold it by bulb 
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