In a building, when exhaust air exceeds ventilation air, a negative pressure is created and the difference is made up through:
A) Duct leakage.
B) Air leaving the building.
C) Air infiltration.
D) Positive pressure.
C
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If an R-12 refrigeration system has its air-cooled condensing unit on a roof with an ambient air temperature of 100°F and the condenser outlet temperature (refrigerant) is 115°F, with how much subcooling is the condenser operating?
A. 15°F B. 30°F C. 100°F D. 130°F
Because of education and a favorable public awareness of water, our national water supply is no longer in jeopardy
Indicate whether the statement is true or false
In binomial nomenclature, the first part of the name identifies the ____________________
Fill in the blank(s) with correct word
A 100-mH inductor is connected in parallel with a 2-k? resistor. The current through the inductor is i(t) = 35e^–400t mA.
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