Why are two sets of contacts (one set normally open and one set normally closed) needed on an indoor fan
relay?
a. To allow high-speed operation in heating.
b. To allow low-speed operation in cooling.
c. To allow high-speed operation after a time delay.
d. To ensure only one motor speed winding is energized at a time.
d
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The condensation resistance factor (CRF) of glazing is directly related to _______.
A) the R-value of the glazing. B) whether or not reflective glass has been used in the glazing. C) the material used in framing members of glazing. D) whether or not tempered glass has been used in the glazing. E) all of the above.
Identify whether the following areas are best lit with AC or DC electrical lighting or if they could be lit with either type of system:
Parking lots: Walkways: either; Patios: Steps:
Define green chemistry.
What will be an ideal response?
To perform a load test on a lead-acid battery, the amount of test current should be _____ times the ampere-hour capacity.
A. two B. three C. four D. five