Surfaces in and along air ducts that direct airflow through the evaporator and throughout the cabinet are called ____.

Reciprocating compressors can be classified by ____.

Evaporators made from two metal sheets that are welded together to form a series of passages are ____ evaporators.

Fin-and-tube evaporators are up to 30% more efficient than microchannel evaporators.

A ____ compressor compresses vapor between the walls of a fixed component and an orbiting component.

Match the following refrigeration and air-conditioning system components with their identifying phrases.

Evaporators featuring metal fins of various styles and types connected to evaporator tubing are ____ evaporators.

Suppose 180,000 people are employed, 20,000 people are unemployed, the working-age population is 250,000, and 50,000 people are not in the labor force. Calculate the unemployment rate.

If the epiglottis does not close properly food can enter the airway.

The cost to firms of changing prices