How can a technician determine when a filter drier is stopped up and needs changing?
A) The pressure drop will exceed 2 psig. B) The drier will vibrate violently.
C) The clogged filter flag will pop out. D) The indicating chemical disc will change color.
A
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Which of the following is a problem for all RF amplifiers (linear and class C) both tube-based and solid state?
A. Self-oscillation B. High-level modulation C. Varying amplitudes D. Low-level modulation
Before starting an oil furnace, the technician should check to see that:
A) The flame-observation door is open for viewing. B) The clean-out doors are open to allow unwanted debris to be blown out during ignition. C) The flame-observation door and all clean-outs are closed. D) The flame-observation door and all clean-outs are open.
What type of loads are superimposed on the building through its use?
A. seismic B. dynamic C. dead D. live
Including mortar joints for a rowlock whose bed depth is equivalent to the length of one brick, there are approximately 6 standard-size bricks per linear foot.
Answer the following statement true (T) or false (F)