Unit 46

Cooling-only room air conditioners are marketed in ____ Btu/h capacities.

• 1,000 to 15,000

• 3,000 to 20,000

• 4,000 to 24,000

• 5,000 to 30,000

The evaporator of a window air conditioner should operate ____.

• far below freezing temperature

• far above freezing temperature

• just above freezing temperature

• at 15°F

The condensate off the evaporator coil in a room air conditioner is generally disposed of by ____.

• draining to the outside soil

• piping to a storm drain

• draining to the slinger system of the fan

• draining to a holding tank

The most common refrigerant used in older room air conditioners is ____.

• R-12

• R-22

• R-410A

• R-500

The evaporator typically operates _____ the dew point temperature of the room air.

• much lower than

• much higher than

• below

• above

The round piece fastened to the outer tips of the condenser fan blade is called the ____.

• blade brace

• dip ring

• air spreader

• slinger ring

A heat-pump-style room air conditioner has all the major components of a cooling-only unit with the addition of a ____.

• 3-way valve

• 4-way valve

• quarter-turn valve

• line-tap valve

To ensure correct direction of refrigerant flow in heat-pump-style room air conditioners, ____ are included in the unit.

• filter drivers

• globe valves

• quarter-turn valves

• check valves

The window unit must be installed in such a manner that air can circulate across the ____ and not recirculate or high head pressures will result.

• condenser

• evaporator

• compressor

• metering device

The addition of a window air conditioner of ____ size may overload a circuit.

• medium

• any

• small

• large