Question

Identify the correct precaution that should be taken while using a clinical thermometer.

• A. It should be held by the bulb.
• B. It should not be washed before use.
• C. The line of sight should be at level with mercury.
• D. Mercury level need not be below ${35}^{\circ }\text{C}$ before use.

Answer 1

The correct option is C The line of sight should be at level with mercury.

• The line of sight should always remain at level with the mercury thread for an accurate measurement.
• Washing clinical thermometers removes germs from it.
• Clinical thermometers held by the bulb give incorrect readings.
• The level of mercury should always be below ${35}^{\circ }\text{C}$ before use.