What are the two general categories of humidifiers?
A) Wet and dry
B) Packaged and split system
C) Condensing and noncondensing
D) Those that rely on heated air and those that supply their own energy to evaporate water
[Ques. 2] What is general corrosion?
A) Corrosion due to chemical incompatibility between the coil and the refrigerant
B) Corrosion due to oxidation and chemical attack
C) Corrosion at the contact point of two types of metal in the presence of an electrolyte
D) Corrosion due to attack by metal-eating organisms
[Ques. 3] Why is carbon monoxide production undesirable in furnace operation?
A) Carbon monoxide is an inert substance. B) Carbon monoxide causes furnace inefficiency.
C) Carbon monoxide may block ventilation. D) Carbon monoxide is toxic.
[Ques. 4] The rotating plate is similar to which other type of humidifier?
A) Vaporizing B) Steam C) Rotating-drum D) Atomizing
[Ques. 5] The products of complete combustion of a hydrocarbon gas are:
A) Water, carbon, carbon dioxide, and carbon monoxide.
B) Water and carbon dioxide.
C) Carbon, carbon dioxide, and carbon monoxide.
D) Carbon dioxide and carbon monoxide.
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