Energy sources which cannot be replenished are called:
A) Non-renewable energy sources. B) Refillable energy sources.
C) Perpetual energy resources. D) Renewable energy sources.
A
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?When mild steel is cut, it forms a light gray colored oxide which primarily consists of ____.
A. ?Fe2O3 B. ?Fe3O4 C. ?Fe2O6 D. ?Fe4O8
How can a technician determine when a filter drier is stopped up and needs changing?
A) The clogged filter flag will pop out. B) The indicating chemical disc will change color. C) The drier will vibrate violently. D) The pressure drop will exceed 2 psig.
Which of the following is (are) always equal to twice the highest frequency of the modulating signal, regardless of its amplitude?
A. FM bandwidth B. Frequency deviation C. AM bandwidth D. Frequency domains
Technician A says that a relay is used to allow a large current to control a small current. Technician B says that relays have allowed the primary circuit switches to be made smaller. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B