Which of the following are true about humidification and contact time?
1) The longer a gas is exposed to water, the greater is the amount of evaporation.
2) The rate of gas flow through a humidifier determines contact time.
3) Low flows decrease and high flows increase relative humidity output.
4) Bubble humidifier contact time depends on the water column depth.

Question

Quizplus · Accepted Answer

1) True, as longer contact time allows for more evaporation.
2) True, as the rate of gas flow determines how long the gas will be in contact with the water molecules in the humidifier.
4) True, as a deeper water column means the gas will have to pass through more water molecules before exiting the humidifier. 
Option 3 is not entirely true, as high flows may not necessarily increase relative humidity output if the humidifier is not designed to handle high flows properly.

Which of the Following Are True About Humidification and Contact