NERC Pre test| 83 QUESTIONS| WITH COMPLETE SOLUTIONS

component of an electrical power system that can function as a motor or as a VAR generator is called a: correct answer: Synchronous condenser What are examples of measuring devices in system protection? correct answer: Current transformers, potential transformers, coupling capacitance voltage transformers. If the load on a three phase system is balanced equally among the phases, how much current will flow on the neutral point? correct answer: neutral current will be zero What are the four major components of an electric power system? correct answer: generation, transmission, distribution and load If current in an AC circuit is doubled, losses in that circuit will... stay the same. correct answer: Be four times greater how are most interchange schedules ramped up and down? correct answer: Symmetrically across the start time When a Balancing Authority's ACE is zero, which of the following conditions is true? correct answer: The BA maintains load-interchange-generation balancing while supporting Interconnection Frequency What does the term "SCADA" stand for? correct answer: Supervisory Control and Data Acquisition Automatic generation increase due to a frequency decrease is the result of... correct answer: Generator governor action In an electric power system, what are the two properties that determine real power? correct answer: Voltage and current What is the purpose of a distribution transformer? to distribute power to the internal load in a substation correct answer: to transform voltage from the transmission level to the distribution level What is the most common limiting factor of a transmission line's ability to carry load? correct answer: thermal Which NERC functional entities are responsible for conducting a reliability assessment of Arranged Interchange? correct answer: Balancing Authorities and Transmission Service Providers