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, which 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) It is possible for air that is too clean to increase the occupant's sensitivity to allergens.
D) The lower pressure drop across high-efficiency filters can cause the blower motor to draw high amps.
A
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Se pueden usar conductores simples de circuito de alimentación y derivado aislados en el suministro de energía eléctrica para pruebas temporales, emergencias, experimentos y trabajos de desarrollo con acceso restringido:
a. al público en general. b. solo a personas autorizadas. c. durante el día. d. a un servicio de 600 V.
Which type of ballast has the highest efficiency?
a. Electronic instant-start b. Electronic rapid-start c. Standard d. Hybrid
If any crankshaft is ground, it must also be ________
A) Chrome plated B) Externally balanced C) Polished D) Shot peened
A resin supplier has suggested that a blow molder of polystyrene parts add 20% polyethylene to improve properties. What property differences would you expect? What processing differences would you expect?
What will be an ideal response?