Gas fired rooftop units are normally vented though
A) Draft hoods connected directly to the unit
B) A separate power venter
C) Double wall vent pipe connected to the top of the unit
D) Double wall vent pipe connected to the side of the unit
A
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¿Cuál de los siguientes sistemas es más probable que se vea afectado considerablemente por armónicos?
a. Sistemas trifásicos de cuatro hilos con cargas no lineales conectadas a circuitos de 120 V. b. Sistemas monofásicos de tres hilos con algunas cargas conectadas a circuitos de 120 V. c. Sistemas trifásicos de tres hilos sin cargas de 120 V. d. Sistemas trifásicos de cuatro hilos sin cargas de 120 V.
In a remote bulb thermostat, as the temperature of the ____________________ changes, as will the pressure exerted on the diaphragm.
Fill in the blank(s) with the appropriate word(s).
When the path of the current flow is interrupted, the circuit is termed ____________________ or broken.
Fill in the blank(s) with the appropriate word(s).
Draw the top, the front, and the right side orthographic views of the objects shown. Indicate when an object needs only one or two views to be fully described.
