A homeowner plans to build a house out in Las Vegas, Nevada, in the middle of the desert. It would be in his/her best interest to lower the 'solar load,' to locate most of the windows on the ____ sides of the house.

The solar load on a structure is the heat gain resulting from the ____.

More than one evaporator coil circuit is used when ____.

A popular material combination used in air-conditioning evaporators and condensers is ___.

In reciprocating compressors used in air conditioning, the motor is mainly cooled by ____.

In rotary compressors, the motor is cooled by ___.

A dirty condenser coil can lead to ___.

High-efficiency condensers ___.

When exposed to salt air, ___ should be used for the screws to secure the sheet metal of cabinets of air conditioning equipment.

The package air-conditioning system is ___ than the split system because it is completely factory assembled and charged with refrigerant.

On a package air-conditioning system, which refrigerant lines must be field-installed?

Appearance is a major drawback with what type of air-conditioning equipment?

The air temperature of the air off an evaporative cooler is ___.

The moisture content of the air in different locations of the country must be taken into account when selecting air-conditioning equipment.

After being threaded many times, the screw holes in condenser cabinets may become oversized; if so, replace the screws with new ones of the same size.

If a structure has no attic, there should be sufficient insulation in the roof to minimize the heat gain in the occupied space.

Air-conditioning equipment will perform at its best efficiency when running at full load.

If a residential split air-conditioning system has a compressor equipped with a start capacitor and relay, it is probably using a thermostatic expansion valve as a metering device.

The supply duct portion of an air handling system needs to be insulated when run through an unconditioned space.

The return duct portion of an air handling system never needs to be insulated.

When an "A" coil is used in a horizontal application, the coil is laid on its side and a special drain pan is required.

Slant coils for downflow application are designed with a coil slant of usually ________________°.

Three types of expansion devices are used in residential air conditioning systems. They are TXV, capillary tube, and orifice.

What are the three common evaporator designs used on air conditioning equipment?

What two functions does the evaporator of a domestic refrigerator perform?

The temperature of the fresh food compartment of a domestic refrigerator is ___.

The heaters located near the refrigerator door to keep the cabinet from sweating are called the ___ heaters.

An accumulator at the outlet of the evaporator is there to ___.

The plastic in the freezer compartment is at very low temperatures and, as a result, is quite ___.

The type of condenser that a domestic refrigerator uses can be a(n) ____ condenser.

The condensate from the evaporator coil is disposed of by evaporation using heat from the discharge line or ____.

The capillary tube metering device on a domestic refrigerator is generally fastened to the ____ for heat exchange.

The adjustment device used for low atmospheric pressure conditions is called the thermostat ____ adjustment control.

On a domestic refrigerator equipped with a defrost cycle that depends on the run time of the compressor, what starts the defrost cycle?

One sure-fire way to determine if the system is operating with less than a full charge of refrigerant is to evaluate the ____.

The refrigerant charge in a domestic refrigerator amounts usually to only a few ____.

Which of the following represents the vacuum level that should be achieved on a domestic refrigerator before charging?

The purpose of door gaskets on a domestic refrigerator is to keep the noise level down when the door is closed.

A household refrigerator may have more than one evaporator coil.

The best tool for defrosting an evaporator coil is a knife.

The defrost timer motor operates independently of the compressor motor.

When installing a line tap valve on the high-pressure side of the system, it is best to install it on the compressor process tube.

When performing a repair on an aluminum evaporator, the best solution is to use an acetylene torch in conjunction with phos-copper brazing rods.

When a suction line filter/drier is added to the refrigerant circuit, the additional amount of refrigerant required is ignored.

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

The evaporator of a window air conditioner should operate ____.

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

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

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

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

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

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

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.

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

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

The term used to reference the assembly of all the components that make up the air-conditioning system is ____.

When servicing an R-410A window air conditioner, adjust the airflow across the condenser until the head pressure reaches ____.

Cooling-only window air conditioners range in size from about 4,000 Btu/h to 24,000 Btu/h.

The compressor for room units is a typical hermetically sealed air-conditioning compressor.

Electrical service for a room unit may also involve the thermostat and the power cord.

Combination cooling and heating units may include electric strip heaters or be of the heat-pump style.

Heat exchange between the capillary tube and the suction line is typically found on window air conditioners.

If a window air conditioner is installed with an inward pitch, the condensate could leak into the room.

All 230-V power supplies use the same style plug.

The thermostat for room units is usually mounted with the control knob in the control center and the remote bulb in the vicinity of the return air.

An extremely dirty air filter can cause the window air conditioner to operate at low suction pressures.

What are the two advantages of draining the condensed moisture to the slinger system on the condenser?

Why do room air conditioners ice up easier than central air-conditioning systems?

Heat enters a structure through walls, closed windows, and closed doors by ________.

Drip-type, swamp cooler, the spray or slinger-type swamp cooler, and the rotary-type swamp cooler are all types of __________.

A smaller coil with more heat exchange surface that requires less charge that can be used for evaporators or condensers is called ___________.

One factor that makes a reciprocating compressor a higher efficiency compressor is that it has no clearance volume.

Air-cooled condensers all discharge hot air, which contains __________.

Most manufacturers agree that the discharge line leaving the compressor should not exceed _______ °F

The typical temperature inside the fresh-food compartment in a domestic refrigerator is

The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically

Domestic refrigerators can terminate the defrost cycle by using which of the following methods?

Upright freezers are generally

(more or less) efficient than a chest freezer.

Typical head pressures should correspond to a con­densing temperature ___°F higher than room temperature at design operating conditions.

Frost accumulates on the evaporators of forced-draft refrigerators because

The line that carries refrigerant into the metering device is the

Typically room air-conditioning unit evaporators boil the refrigerant at

The refrigerant in the capillary tube is ___ at the outlet than at the inlet.

Room units that use the heat pump cycle absorb heat from outdoors in the winter and reject the heat indoors by using a ___ reversing valve.

A 208/230-V unit will have ___ hot wire(s) and a ground.

During the heat pump heating cycle, the hot gas from the compressor discharge line is directed to the

Typically, window air conditioners utilize automatic defrost.

A window-unit heat pump compressor is the same as a conventional window-unit air-conditioning compressor.

The two types of installation for both cooling and cooling-heating room units are _____________.