The number of cyclic wave forms present at one time in an AC circuit is called:
A) Phase. B) Hertz. C) Frequency. D) Ohms.
A
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If a CMU wall is vertically reinforced at 8 in. on centers, which of the following units will you recommend for use in the wall?
A) Sash unit B) H-unit C) A-unit D) Bond beam unit E) Standard unit with three webs
When using inert gas to displace oxygen from a container prior to cutting, provide a _____.
a. relief valve b. weephole c. drain plug d. vent hole
A stainless steel coil that is built like a refrigeration coil and allows a high-efficiency unit to move into the 90+ efficiency range is called
A) a recuperative coil. B) a serpentine coil heat recuperater. C) a hybrid coil recuperater. D) a serpentine coil heat exchanger.
High head pressures from low ambients can cause insufficient refrigerant flow rates through metering devices, which in turn starve evaporators.
Answer the following statement true (T) or false (F)