ACR copper tubing is:
A) Type L, dehydrated copper tubing.
B) Copper tubing with added metallurgical alloys that resist corrosion from the refrigerant.
C) Type M, dehydrated copper tubing.
D) Any type of copper tubing so long as it has been dehydrated.
A
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Which of the following is true of volumetric feeders?
A. They do not have the ability to change feed rates. B. They convey material at a controlled rate by measuring the weight lost over time. C. They convey material at a controlled rate by running at a set motor speed. D. They move material using pressured gas flow from one point to another in a continuous stream.
El dispositivo que se utiliza en contactores magnéticos para evitar vibraciones y reducir el zumbido es un(a):
a. bobina desenganchada. b. dispositivo de salida de estado sólido. c. bobina de sombra. d. bobina enganchada.
Hospital-grade receptacles are _____.
a. easy to identify because they are solid blue in color b. tested for superior mechanical strength c. interchangeable with industrial grade receptacles d. used only in the anesthetizing location of the surgical suite
When preparing an engine to use cast-iron piston rings the cylinders must be honed to a surface finish of ________ microinches
A) 20 to 30 B) 18 to 25 C) 200 D) 35