What type of metering device do most packaged water source heat pumps use?
A) a single bi-flow thermostatic expansion valve B) a single capillary tube
C) a single low side float control D) a single orifice style metering device
A
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List the various components of a steam generation system.
What will be an ideal response?
Respiration by plant and animal cells along with photosynthesis releases oxygen and consumes carbon dioxide
Indicate whether the statement is true or false
Technician A says that the system safety pop-off valve should be set at a lower pressure than governor cut-out. Technician B says that system pressure should be maintained at a constant 120 psi. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
The hydrostatic pressure created by a liquid in a closed container __________ when its temperature increases.
A. increases B. decreases C. stays the same