Levels make use of a glass tube filled with

What will be an ideal response?


a freeze?resistant liquid

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El silicato de calcio/la perlita expandida se utilizan SOBRE TODO en:

a. trabajos a baja temperatura. b. sistemas de agua fría. c. tuberías subterráneas. d. sistemas de alta temperatura.

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The newest HVACR control systems operate by:

A) Turning relay coils on or off to complete circuits. B) Processing electronic signals with a microprocessor. C) Providing a modulating air pressure in response to monitored conditions. D) Providing a varying DC voltage in response to monitored conditions.

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Electrical distributors, often considered ____ providers, distribute materials to end users and contractors. a. solutions c. outside b. electricity d. inside

a. solutions b. electricity c. outside d. inside

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Which metering device is very sensitive to the amount of refrigerant charge in a system?

a. Thermostatic expansion valve b. Capillary tube c. Electronic expansion valve d. Crankcase pressure regulator

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