The burner gas input rate can be varied in 1 percent increments by using _____.
a. an automatic gas valve
b. a variable-speed inducer fan
c. LP gas
d. a modulating gas valve
d. a modulating gas valve
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Los requisitos para los conductos RMC se pueden encontrar en el:
a. Artículo 392 del NEC®. b. Artículo 344 del NEC®. c. Artículo 352 del NEC®. d. Artículo 300 del NEC®.
If the generators are asynchronous, then the control mode may be ____________________ mode, variable slip mode, or variable slip with DFIG mode.
Fill in the blank(s) with the appropriate word(s).
The term "listed" means that ____.
A. equipment, materials, or services meet appropriate designated standards or have been tested and found suitable for a specified purpose B. equipment or material must continue to comply with the appropriate standards (or performance) under which the labeling was granted C. equipment or material complies with discretionary standards as listed in the NEC® D. equipment or material is listed for sale by general or subcontractors
In a hydraulic system, movement depends on _____
a. flow b. pressure c. flow rate d. temperature