Water flow rate for a hydronic heating system is measured in __________.
A. gallons per minute
B. gallons per hour
C. gallons per second
D. ounces per minute
Answer: A
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The ____________________ is the standard unit of linear measure in the metric system.
Fill in the blank(s) with the appropriate word(s).
In some locales, wind and seismic forces require the use of a(n) ____ to improve the lateral (side-to-side) strength of an exterior wall.
a.shearwall b.embankment c.buttress d.abutment
Why does a heat pump need two metering devices?
A) Two metering devices provide increased refrigerant flow at low ambient temperatures in heat. B) One metering device is used for first-stage heat and another for auxiliary heat. C) One metering device is used for the refrigerant circuit and another for the heat strips. D) One metering device is used for the cooling cycle and one for the heating cycle.
Which type of economizer is capable of choosing between the use of outside air or return air, based on the
enthalpy of the two airstreams? a. All economizers b. Enthalpy economizers c. Integrated economizers d. Dry-bulb economizers