When free cooling operation is not practical but the system is operating in an occupied mode, an economizer
damper will be in its _____.
a. fully open position
b. fully closed position
c. half open position
d. minimum position
d
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Which of the following is a true statement regarding the circuit shown below?
A. The resistance value (ohms) of the resistor influences the amount of time for the capacitor to charge. B. The capacitance value (farads) influences the amount of time for the capacitor to charge. C. Moving the switch from position 1 to position 3 would cause the direction of current flow through the resistor to reverse. D. All of the above are true statements.
Using the steam tables in the appendix, complete the following chart of Thermodynamic properties for water. Use computer-based programs or apps to check your results.
What will be an ideal response?
Three -tab asphalt shingles are most commonly used for an asphalt shingle steep roof. What do the tabs represent and what is their purpose?
What will be an ideal response?
Wire connectors marked only with the wire size should only be used on _____.
a. aluminum conductors b. copper conductors c. aluminum or copper conductors d. THWN conductors