The constriction in the capillary tube of a clinical thermometer is
A. to allow mercury’ to expand uniformly.
B. enable the measurement of temperature below 40 °C.
C. to prevent the mercury from flowing back quickly into the bulb.
D. prevent bursting of the mercury bulb due to high pressure.
Answer:C
The constriction in the capillary tube of a clinical thermometer is
A. to allow mercury’ to expand uniformly. B. enable the measurement of temperature below 40 °C. C. to prevent the mercury from flowing back quickly into the bulb. D. prevent bursting of the mercury bulb due to high pressure.