Practice Test NERC| 232 Questions| WITH COMPLETE SOLUTIONS

A transmission line is operating with a voltage phase angle different of 30 degrees between the sending Vs and the receiving bus Vr. If the receiving end load is suddenly increased, the voltage phase angle difference will be? correct answer: The phase angle will increase. When load is increased phase angle will increase. A load has a power factor of 0.9 lagging. If the load draws 100 MVA, what is the MW draw? correct answer: 90 pf= mw/mva The high side of a delta-wye connection transformer is connected to a power system with 199 kV L-G high side voltage. What is the voltage across the delta winding of the transformer? correct answer: Vl-l= square root of 3 times Vl-g 1.73x191= 345kV If a transmission line is carrying 400 MW and 300 MVAR what is the MVA? correct answer: 3-4-5 triangle 500 MVA The prime mover is the component of the generator that creates the rotational force. In a typical coal fired steam generator what component spins the rotor? correct answer: Turbine Reactive reserve response during a disturbance is best obtained from which devise? correct answer: Synchronous condensers For two identically constructed transmission lines where Line A is 150 miles long and line B is 15 miles long, if both lines are lightly loaded? correct answer: A produces more reactive power than B. Lightly loaded transmission lines essentially behave like? correct answer: Shunt Capacitors You receive an alarm that indicates low oil pressure on an underground transmission cable. SCADA shows the pressure is continuing to drop. What is the first step you take to protect the line? correct answer: Isolate the line Computer simulations show that for a 100 MW schedule from Bus A to Bus B, 63% of the schedule will flow on the scheduled path and the remainder will flow on other parallel paths. What is the distribution factor for the scheduled path? correct answer: 63% Which statement best describes how reactive power MVAR power normally flows? correct answer: High Voltage to Low Voltage Which of the following types of data are BA and RC not required to share with one another? correct answer: Generator start up cost TOP must develop, maintain, and implement formal