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NERC RANDOM Questions

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NERC RANDOM Questions When current in an AC circuit is doubled, power losses in the circuit will respond in which way? a) half as much b) does not change c) doubles d) four times greater - ✔✔ ... d) four times greater What determines the size of insulators used on power lines? a) Current flow on the line b) Voltage level of the line c) Reactance of the line d) Operating Limit of the line - ✔✔b) Voltage level of the line Reactive power is needed to support which type of load? a) Inductive b) Capacitive c) Impedance d) Resistive - ✔✔a) Inductive When isolating equipment in the electrical system, what device is most often used as a visual clearance point? a) Circuit switchers b) Fuses c) Disconnect switches d) Circuit breakers - ✔✔c) Disconnect switches What is current? a) Electrons that flow on a conductor b) Electrical pressure applied to a conductor c) Sine wave d) Water flow rate - ✔✔a) Electrons that flow on a conductor How many phases are there in most high voltage power systems? a) 10 phases b) 1 phase c) 3 phases d) 2 phases - ✔✔c) 3 phases What does the term system fault mean? a) the physical problem in a device, component or element b) abnormal current flow on an unintended path c) a device or component not operating as designed d) the fault of the system for not operating as designed - ✔✔b) abnormal current flow on an unintended path What is the most common type of fault on the power system? a) Line to Ground b) Line to Line c) Three Phase d) Phase to Neutral - ✔✔a) Line to Ground When a high voltage transmission line is producing reactive power due to the conductor being energized and lightly loaded, the line exhibits which characteristic? a) Resistive b) Inductive c) Lagging d) Capacitive - ✔✔d) Capacitive Why would a power company purchase generation from another company versus generating themselves to meet their load? a) So they can sell at a profit b) To create inadvertent c) For Economics d) Don't have enough generation - ✔✔c) For Economics What is a common type of substation configuration? a) Breaker and a half b) Highway c) Radial d) Junction - ✔✔c) Radial In normal operations, which type of power usually h [Show More]

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