The most important elements to check for in gas furnaces are adequate combustion air and:
A) Proper venting. B) Electrical connections.
C) Refrigerant levels. D) Airflow components.
A
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A(n) __________ shows information such as the location of a house, walkway, or driveway on the building lot.
a. exterior elevation drawing b. floor plan c. plot plan d. sectional drawing
What are the three most common ways to reduce pollutants in indoor air?
A) HEPA filters, electronic air cleaners, and UV lights B) Source removal, ventilation, and filtration C) HEPA filters, UV lights, and ozone generators D) Creating a negative building pressure, filtration, and ventilation
The air lines on a combination vehicle are often colored to prevent them from mixing up. The emergency line is _______ , the service line is _________ .
a. blue, red b. black, yellow c. red, blue
What is the symbol for capacitive reactance?
A. C B. XC C. L D. XL