Ques:Q: What are the three most common protective devices? Choices: - fuses , circuit breaks & surge claws - tranistors, resistors & diodes - fuses , fabrication breaks & surge protectors - fuses, circuit breaks & surge protectors A:

Ans:fuses, circuit breaks & surge protectors
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Ques:Q: What element once commonly used in paint and gasoline has now been found to have dangerous effects? Choices: - plastic - chromium - niacin - lead A:

Ans:lead
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Ques:Q: What type of energy is possessed by autumn leaves before they fall? Choices: - mechanical energy - kinetic energy - radioactive energy - potential energy A:

Ans:potential energy
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Ques:Q: What are surface currents mainly caused by? Choices: - lightning - waves - rains - winds A:

Ans:
winds
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