The basic components of an HVAC system that delivers conditioned air to maintain thermal comfort and indoor air quality are:
A. outdoor air intake and an air filter
B. mixed-air plenum and outdoor air control
C. heating/cooling coils and humidification and/or de-humidification equipment
D. all of the above
Ans: D. all of the above
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?In the Middle Ages, common products made by horners were ____.
A. ?horse shoes B. ?lantern windows C. ?gas lights D. ?musical instruments
Answer the following statement(s) true (T) or false (F)
1.Attenuation is the internationally recognized unit of loudness and is measured in decibels (dB). 2.Energy efficiency is one of the most important features of a green home. 3.Automatic controls such as timers will reduce electricity waste in a house. 4.One of the best choices for energy-efficient lighting is incandescent lighting fixtures.
The ____________________may need to be reset after an air filter replacement.
Fill in the blank(s) with the appropriate word(s).
The indicated horsepower is 75, but only 65 horsepower is delivered at the driving wheels. What is the mechanical efficiency? Express the answer to the nearest whole percent.
A. 68% B. 70% C. 75% D. 87%