Chapter-04 Review Questions Student: ____________________________________________ 1. The secondary voltage directly proportional to the ________ ratio. 2. A major function of the distribution systems is to _______ the transmission line voltage to 10’s of thousands of volts. 3. Transformer capital cost is only second to ___________ cost. 4. Iron core improves the efficiency of the transformer by concentrating the ___________ and reduces transformer losses. 5. Bushings are used on transformers, circuit breakers, and many equipment as connection points. The higher the voltage the _________ the bushing size. 6. Current transformers or CTs are used to scale down the high magnitude of current flowing in highvoltage conductors to a level __________________________________. 7. _________________ are used to scale down very high voltages to levels that are safer to work with. 8. Voltage regulators are motor controlled multi-tap ______________. 9. A breaker mechanically moves electrical contacts apart inside an interrupter, causing ______to occur that is immediately suppressed by the high-dielectric medium inside the interrupter. 10. Compared to fuses, circuit breakers have the ability to open and close repeatedly, whereas a fuse opens the circuit one time and must be ________. 11. As breaker contacts open an electrical _______can be created 12. Reclosers automatically opening and reclosing of power circuits. Reclosers are typically set to trip and reclose two or three times before a ________ condition occurs. 13. Disconnect switches provide _______ openings for maintenance personnel (an OSHA requirement for safety against accidental energization). 14. Arcing rods are sacrificed to reduce _______switch contacts. 15. The newer lightning arresters use gapless metal oxide semiconductor materials ________________________. 16. Motors are typically inductive loads. Capacitors are used to________ out the lagging current effects from motors and transformers. 17. Real Power (P) does the ________ in the load: motor, lights. 18. Reactive Power (Q) power flows but does ________work 19. CT’s and PT’s cables from the outside yard equipment terminate in the ____________ cabinets or relay panels. 20. Predictive maintenance can identify potentially serious problems ____________________________.