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20 Cards in this Set
- Front
- Back
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The type of filter that can be reused and regenerated using an oil based substance is ?
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Viscous impingement type
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Which of the following are air washers designed to do ?
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Humidify, dehumidify and cleanse the air
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The most common type of fan or blower used on a furnace or RTU is the ?
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Squirrel cage fan
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The type of air conditioning equipment that requires the most service is the
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RTU- Unitary
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Downstream of a dual duct mechanical room, each air conditioned room or area is required to have a < Blank> installed.
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Mixing box
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The type of ducting designed for high velocity ducting is a ?
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Round duct
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An essential item required on a steam heating coil with an automatic control valve is a ?
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Vacuum breaker
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The type of coil design that is used when air temperature across a coil is greater than 35 F and 55F is ?
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Installed two deep
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Cooling towers are interconnected to ?
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Condensers
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The most common energy source for a heat pump is
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Air source
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The type of ducting designed for high velocity ducting is a ?
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Round duct
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An essential item required on a steam heating coil with an automatic control valve is a ?
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Vacuum breaker
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The type of coil design that is used when air temperature across a coil is greater than 35 F and 55F is ?
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Installed two deep
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Cooling towers are interconnected to ?
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Condensers
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The most common energy source for a heat pump is
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Air source
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A variable heat pump system will have ?
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Two metering valves
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The fixed heat pump system will control the heat/cool cycle by the use of ?
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Motorized dampers
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Icing of the evaporator is caused by?
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Low refrigerant pressure in the evaporator
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The receiver on a refrigeration system is located ?
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Upstream of the filter/dryer
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The safety valve from a receiver should be piped ?
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Away from the air intakes
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