Why should caution be exercised when replacing a low efficiency air filter with a higher efficiency air filter?
A) Higher efficiency filters have a higher pressure drop that can cause poor airflow.
B) Air conditioning coils depend on a certain amount of small particulates to help moisture precipitate out of the air.
C) The lower pressure drop across high efficiency filters can cause the blower motor to draw high amps.
D) It is possible for air that is too clean to increase the occupant's sensitivity to allergens.
A
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The 50-ampere lighting circuits used in the trolley systems are approved by ____.
A. IEEE Institute of Electrical and Electronic Engineers B. NEMA National Electrical Manufacturers Association C. Underwriters Laboratories D. Wyle Laboratories
List the three most common combustion chamber designs and describe their shapes.
What will be an ideal response?
On what basis can we judge the thermal properties of a material?
What will be an ideal response?
An office 7 meters by 6 meters is wired for lights. Twenty 40-watt lamps are installed. What is the power consumption for the office lighting in watts per square meter. Carry the answer to three decimal places.
Fill in the blank(s) with the appropriate word(s).