Los relés de sobrecarga de estado sólido se pueden diseñar de manera que protejan el motor y los dispositivos de control contra todos los problemas siguientes, EXCEPTO:
a. sobrecalentamiento.
b. cortocircuitos.
c. pérdida de fases.
d. inversión de fases.
b. cortocircuitos.
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Which of the following is the formula for calculating the surface area of a circle?
a. 2(?R2) + 2?R(L) b. ?R2 c. a2 + b2 = c2 d. none of the above
Why are eductors reliable pieces of equipment?
A. They have no moving parts. B. They are very corrosion-resistant. C. They are very erosion-resistant. D. All of the above
What are the most common desiccant materials used in driers?
A) Molecular sieve and activated alumina B) Alcohol and hydrogen peroxide C) Activated alumina and activated charcoal D) Activated carbon and alcohol
Clothes dryers work most efficiently when the clothes are as ____ as possible when loaded into the dryer.
A. dry B. clean C. compacted D. wet