____ are created by outdoor power lines, interior wiring, lighting, and motors.
A. EACs
B. EMFs
C. ECFs
D. EMLs
Answer: B
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____ stone consists of irregular fragments from a quarry that have one good face.
A. Dimension B. Limestone C. Fieldstone D. Rubble
A ____ can be produced when a voltage causes current to flow through the skin.
a. shock b. fire c. charge d. battery
The subsequent problems deal with the circuit below where the op amps are LM741's powered by a ±15 V power supply. Assume R1 = R2 = R3 = R4 = R. Assume the op amps are ideal.
If Vi = 20 V, V1 (for the "real" LM741) would be approximately
A. 20 V B. 13.6 V C. 0 V D. 5 V E. 10 V
When replacing a transformer, the technician should always check
A) The 24 volt control circuit for shorts B) The temperature rise across the furnace C) The air filter and airflow D) The continuity of the electric strip heaters