Unit 49 HVAC review
Residential air conditioners range from a capacity of 4,000 BTUH to a capacity of:
65,000 BTUH.
Typical condenser fan motor speeds are about:
800 rpm or 1,000 rpm.
The outdoor air-cooled condensing unit consists of:
A compressor, condenser coil, a condenser fan, and the necessary electrical control box assembly.
What type of fan is used in most air-cooled condensing units?
A draw-through propeller fan
Air conditioners identified as "unitary" means manufactured and sold as:
A unit.
What is the major advantage of mini-split air-conditioning systems?
Air ducting is not necessary.
In a mechanical vapor compression refrigeration cycle high-pressure, high-temperature vapor travels to the:
Condenser.
The steady-state rating system used to measure the efficiency of room air conditioners is:
EER — energy efficiency ratio.
The heating options for package air conditioning units, include heat pump operation, electric resistance heat, and:
Gas-fired heat.
A mini-split A/C system that cools in summer and heats in winter by reversing the flow of refrigerant is called a:
Heat pump.
Most air-conditioning units perform temperature control and:
Humidity control.
The mechanical vapor compression refrigeration cycle:
Includes four major components.
Where is the split-system evaporator coil located?
Inside the conditioned space
Why were split systems developed?
It is not always practical to have all the components of a large air-cooled system located in a single box.
Window unit air conditioners are designed primarily to supply cool air to:
One room.
A typical residential split-system air conditioner has the evaporator located indoors and the condenser and compressor located:
Outdoors.
Where is the condensing unit of a split system located?
Outside
Unitary systems called gas-packs are:
Package air conditioners with a gas furnace included.
The unitary small equipment category does not include:
Packaged terminal air conditioning units.
What types of systems are particularly well suited to split system design?
Residential air-conditioning systems with air-cooled condensers
Air conditioning systems that does not control air quality or cleanliness can cause:
Sick building syndrome.
How is the energy efficiency ratio (EER) calculated?
The output in Btuh is divided by the input in watts.
