Explain the effect of Heat Islands
What will be an ideal response?
Heat islands are caused by dark surfaces on roofs, pavement, and parking lots. These dark surfaces absorb the heat from the sun and elevate the temperature in the surrounding area. This can cause and increase in temperature in surrounding areas.
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Briefly describe differential backup. What are some of the advantages and disadvantages of using differential backup?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. Compact Florescent Lights (CFLs) are the type of electric light source most commonly used throughout the world over the last century. 2. CFLs are small versions of full-sized florescent tubes that have been used for decades in commercial lighting venues. 3. LEDs are small, solid light bulbs that are extremely energy efficient. 4. A recent government Energy Star report found that use of consumer electronics products accounted for less than 25 percent of total household electricity consumption. 5. Refrigerators should be installed in a way that vents the discharged heat to the outside.
How can a high pressure drop across an air filter adversely affect system performance?
What will be an ideal response?
Post-purge is the process of keeping the burner blower energized for a period of at the end of the heating cycle. This process is also referred to as __________.
A. motor-off-delay B. valve-on-delay