Which is not a method employed to maintain the desired temperature of the spray water in air washers used in air conditioning systems?

Which is not a method employed to maintain the desired temperature of the spray water in air washers used in air conditioning systems?

a) an electric heater and fan
b) part of the spray water is recirculated and hot or cold water is added as required
c) the spray water if recirculated through a heat exchanger and is cooled by chilled water
d) the spray water is recirculated through a heat exchanger and is heated by hot water
e) a heating or cooling coil is directly mounted in the sump of the washer





Answer: A

Air washers used in air conditioning systems

Air washers used in air conditioning systems

a) only clean the air
b) only clean and cool the air
c) only humidify and dehumidify the air
d) humidify, heat, cool, dehumidify, and clean the air
e) only humidify, cool, and clean the air







Answer: D

Pan type humidifiers with plates

Pan type humidifiers with plates

a) consist of rotating plates in a pan partially filled with water
b) are placed in individual rooms to humidify the individual rooms
c) consist of a shallow pan, partially filled with water in which absorbent plates are placed and the pan is installed in the supply plenum of smaller warm air furnaces
d) consist of plates in a pan through which water is sprayed by a spinning disc or cone
e) can be a power type or a bypass type







Answer: C

It is not recommended to use an on-off switch for steam grid humidifiers because

It is not recommended to use an on-off switch for steam grid humidifiers because

a) fogging would occur
b) overheating would occur
c) misting would occur
d) wide fluctuations in relative humidity would occur
e) all of the above






Answer: E