Halon fire suppression systems _______________
A. have been restricted under the Montreal protocol
B. are no longer being installed
C. now can be replaced with more earth-friendly gasses
D. all of the above
D
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In a typical air conditioning system, ____________________ cfm of air is moved through the evaporator for each 12,000 Btu/h cooling capacity of the system.
Fill in the blank(s) with the appropriate word(s).
Conservation tillage can help reduce salt build up by reducing surface evaporation
Indicate whether the statement is true or false
Match the NEC chapters to the subjects they cover.
A. special conditions B. applicable tables C. general wiring practices and equipment D. communications systems
A low pressure control has a "high event" and a "differential" setting. The technician wants the system to turn on at 28 psig and shut down at 2 psig. What would be the proper settings?
A. high event: 28 psig, differential: 2 psig B. high event: 2 psig, differential: 2 psig C. high event: 28 psig, differential: 26 psig D. high event: 2 psig, differential: 28 psig