When is the water coil in a water-source heat pump the acting condenser?
A) In the cooling cycle B) In the heating cycle
C) In the defrost cycle D) Only when the unit is operating
A
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¿Cuál de las siguientes acciones no hará que el centro de gravedad de la grúa se mueva hacia el eje basculante?
a. Retirar el contrapeso de las estructuras superiores b. Bajar la pluma c. Plegarse d. Agregar contrapeso de las estructuras superiores
What was the most commonly used refrigerant gas for geothermal pumps for almost one hundred years?
a. chlorofluorocarbons (CFCs) c. carbon dioxide (CO2) b. hydrogen sulfide (H2S) d. methane (CH4)
A split system's data plate is useful because:
A) The detailed procedure for charging a new split system can be found on it. B) The factory charge is shown on the data plate. C) It always shows how much refrigerant to add or subtract. D) It provides instructions for proper evacuation of the refrigeration system.
A datum reference frame consists of ____ perpendicular planes.
A. one B. two mutually C. three mutually D. four mutually E. none of the above