Author Question: The pointer on a dial type thermometer is moved by a: A) Volatile fluid. B) Lever which is moved ... (Read 150 times)

jilianpiloj · **on:** Jul 26, 2018

The pointer on a dial type thermometer is moved by a:

A) Volatile fluid. B) Lever which is moved by a column of mercury.
C) Bi-metal element. D) Heat motor and gears.

Question 2

What is the operating principle of glass stem thermometers?

A) The fluid inside the thermometer boils as it is heated, causing the liquid level to rise.
B) The fluid climbs the walls of the tube through capillary attraction, which works better at higher temperatures.
C) The refractive properties of the glass stem change with temperature, making the fluid level appear higher at higher temperatures.
D) Expansion and contraction of the fluid makes the liquid level rise and fall with temperature.