10. If you see a selenium rectifier in your factory, you should A. check its forward bias. B. have it replaced. C. check

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10. If you see a selenium rectifier in your factory, you should A. check its forward bias. B. have it replaced. C. check its forward current. D. check its case temperature.
2. What advantage is there to the placement of mercury inside a vacuum tube? A. The tube operates cooler. B. The tube turns on faster. C. The tube operates at higher currents. D. The tube lasts longer.
9. In a full-wave non-bridge rectifier circuit, the transformer must be a A. center-tapped transformer. B. dual secondary transformer. C. dual voltage transformer. D. dual primary transformer.