Electronic air cleaners generally have ____.
A. ionizing sections
B. charcoal filters
C. pre-filters
D. all of the above
Answer: D
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If an inspection is requested when the project is not ready, the building official may charge a fee for excess time spent.
Answer the following statement true (T) or false (F)
The best knot to use when two ropes must be joined for use as a tagline is the _____.
a. clove hitch b. half hitch c. short splice d. bowline
Technician A says when an external gear drives another external gear, the output gear will rotate in the opposite direction to the input gear. Technician B says when an external gear drives another external gear, the output gear will rotate in the same direction as the input gear. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
Once acid is created within the refrigeration system:
A) Dry nitrogen must be used to reverse the increase in system high-side pressure caused by the acid. B) It can cause a burnout when the refrigerant is exposed to the compressor motor. C) Only a multiple evacuation procedure can be used to evacuate the refrigeration system. D) It becomes impossible to remove brazing oxides and metal particles from the system, even if a filter drier is used.