What is the total system charge for a system with a factory charge of 56 oz of R-410A, an assumed length of 15 ft, and a 3/8 in liquid line that is 35 ft long?
A) 56 oz B) 56 oz + 12 oz = 68 oz
C) (35 - 15 ) × 0.6 = 12 oz D) 56 oz + 21 oz = 77 oz
B
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If theoretically perfect combustion takes place in an engine cylinder using a diesel fuel, what should result from the reaction out the tailpipe?
A. nitrogen and oxygen B. water and carbon dioxide C. hydrocarbons and NOx D. particulate matter (PM) and carbon
____ are metal pieces formed into various shapes to join wood to wood, or wood to concrete or other masonry.
a. Universal plugs b. Conical screws c. Connectors d. Molly screws
Eddy current loss in a transformer is ________
A) caused by rapid reversal of the magnetic field B) another name for flux leakage loss C) due to current flowing in the core D) caused by the resistance of the wire
The main divisions of the HVACR industry include:
A) Air conditioning, heating, or refrigerating industrial building structures. B) Heating and cooling residential building structures. C) Cooling, heating, ventilating, or refrigerating specific spaces. D) Ventilating and cooling commercial building structures.