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Desiccant: Quiz


Question 1: The performance of any desiccant varies with temperature and both relative humidity and ________.
HumidityPrecipitation (meteorology)WindWater vapor

Question 2: Another measure is the residual ________ of the air or other fluid being dried.
Relative humidityDew pointWater vaporHeat index

Question 3: Most useful desiccants can be ________ by thermally-induced drying, for example, in a conventional kitchen oven, or with solar energy.
Zero wasteBiofuelRecyclingWaste

Question 4: Commonly encountered pre-packaged desiccants are solids, and work through absorption or ________ of water, or a combination of the two.
AdsorptionChemisorptionBET theorySurface science

Question 5: Drierite, ________, calcium sulfate, calcium chloride, montmorillonite clay, and molecular sieves are commonly used as desiccants.
EthanolAluminiumChromatographySilica gel

Question 6: One measure of desiccant efficiency is the ratio (or percentage) of water storable in the desiccant, relative to the ________ of desiccant (ie weight).
MassForceGeneral relativityClassical mechanics

Question 7: For more demanding applications, requiring very pure, anhydrous solvents a ________ still is used to remove moisture and other impurities simultaneously.
Spinning coneDistillationAzeotropeLiquid-liquid extraction

Question 8: Pre-packaged desiccant is most commonly used to remove excessive ________ that would normally degrade or even destroy products sensitive to moisture.
WindWater vaporPrecipitation (meteorology)Humidity

Question 9: ________ is a common "low-tech" alternative frequently used, for example, in salt-shakers to maintain granularity of table-salt for effective pouring or shaking.

Question 10: Desiccants are also used to dry ________, typically used for moisture free reactions (e.g.


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