The fastest method for charging a large system that holds 50 lb of refrigerant is to add:
A) Vapor into both the suction service valve and king valve with the system off.
B) Liquid into the king valve with the king valve front-seated and the system operating.
C) Liquid into the suction service valve with the system running.
D) Vapor into the suction service valve with the system off.
B
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Building occupants are often assume to liberate 500 Btuh, consisting of 250 Btuh sensible heat + 250 Btuh latent heat. If, for some reason, the occupants liberated 600 Btuh, consisting of 150 Btuh sensible heat + 450 Btuh latent heat, which of the following effects would occur? Select all that apply.
A) Less refrigeration would be needed. B) More refrigeration would be needed. C) More air would be needed to cool the space. D) Less air would be needed to cool the space.
What type of written or visual communication is not appropriate on the work site?
a. A clear, simple sketch b. Acronyms and textspeak in a written message c. Legible handwriting d. A hand-drawn map for presenting directions
Use PSpice to find v? and i? in the circuit of Fig. 10.130.
 FIGURE 1.png)
Control of the head pressure in an air-cooled condenser is done by ____.
A. cycling the condenser fan B. controlling dampers in the airstream through the condenser C. flooding the condenser with refrigerant D. all of the above