Among the following what should not be done while or before using a clinical thermometer?
- Ensure that before use the mercury level is below .
- Wash the thermometer with hot water.
- Handle the thermometer with care, as you handle any glass articles.
- 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