Explain the function of the substation and state the difference between a transmission substation and a distribution substation
What will be an ideal response?
A substation is a network of switching equipment, control equipment and transformers that are an integral part of the transmission system. A transmission substation provides the interface between the generating stations to the transmission
lines and a distribution substation provides the interface between the transmission lines to the users.
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Why are dynamic compressors more commonly used than positive displacement compressors?
A. They are more efficient. B. Less energy is required. C. They have a smaller capacity. D. They require no maintenance.
How does air from air-conditioning vents affect open display cases?
A) Open display cases are not affected by external air sources because of their powerful built-in air curtains. B) Open display cases are not affected by external air sources because of their engineered air baffles. C) It improves their performance by lowering the temperature of the air surrounding the display case. D) It disrupts the case's air curtain, causing them to rise in temperature.
What is the configuration when a fire department switches from a duplex channel to a simplex channel for on-scene communications called?
A. a talk-around channel B. a repeater system C. an on-scene communication switch D. a trunking system
When creating auxiliary views, distances should actually be measured from the ____ view.
A. adjacent B. top C. related D. reference