When a system is equipped with a pump-down solenoid valve, _____.
a. the valve closes when the compressor starts
b. the valve opens once the demand for cooling is satisfied
c. the valve opens when the compressor shuts down
d. the valve closes before the compressor shuts down
d. the valve closes before the compressor shuts down
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Where is the reversing valve located in a split-system air-to-air heat pump?
a. Air handler b. Indoor coil c. Heat exchanger d. Outdoor unit
Determine the 2nd quartiles of the following data set.2, 8, 9, 11, 24, 27, 29, 31, 34, 37, 40, 42, 47, 51, 54, 56, 59, 62, 70
Fill in the blank(s) with the appropriate word(s).
Splices in wire-type grounding electrode conductors are acceptable only if by means of irreversible compression-type connectors (listed as grounding and bonding equipment) or by the ____.
A. endothermic welding process B. exothermic welding process C. cold fusion D. hot spark technique
An inductor is placed in series with the load for power supply filtering
Indicate whether the statement is true or false