Natural draft cooling towers usually operate with a ____________________ approach temperature than a forced draft cooling tower.
Fill in the blank(s) with the appropriate word(s).
higher
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In early control systems, almost all components necessary for the operation of the air-conditioning system were mounted on the wall near the condensing unit.
Answer the following statement true (T) or false (F)
Technician A says that diesel fuel is composed of roughly 85% carbon. Technician B says that diesel fuels commonly contain around 15% hydrogen. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
A trap in the condensate line prevents ____.
A. air from being drawn up into unit from the end of the drain B. foreign particles from being pulled into the condenser C. the pump turning on if the float fails D. Both a and b.
When must a low pressure warning switch activate an alert?
A. at system cut-in pressure B. as system cut-out pressure C. when actuation pressure is 5 psi D. when system pressure drops to 60 psi