How do most manufacturers prefer technicians prime secondary fuel filters?
A. After installation using the priming pump.
B. After installation by hand.
C. Before the primary filter.
D. Pre-charged before installation.
Answer: A
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Varied line weights should be used to represent concrete, sectioned continuous materials, and the material that lies beyond the cutting plane.
Answer the following statement true (T) or false (F)
Answer the following statement(s)
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In a dual-fuel heat pump, what operates when second-stage heat calls?
A) The heat pump starts and the furnace shuts off. B) The electric heat strips are energized to supplement the furnace. C) The furnace starts and the heat pump shuts off. D) Both the heat pump and the furnace operate.
If two out of phase signals are applied to the inputs of a differential amplifier it is operating in
A) single-ended mode B) differential mode C) common mode D) common rejection mode