NERC question questions with correct answers

Two phase conductors of a 138kV transmission line come in contact due to a storm, creating a phase to phase fault. The distance relay at each end of the line tripped and isolated the line. What two measured parameters of the line caused the distance relay to operate? Temperature and length MWs and MVARs Voltage and current Resistance and Impedance CORRECT ANSWER Voltage and current What is the main cause for having low voltage on the Transmission and Distribution system? Over generation in the Interconnection Not enough transmission line in service Excessive of reactive resources A shortage of reactive resources CORRECT ANSWER A shortage of reactive resources The largest single contingency for Balancing Authority A is a unit rated at 900 MW. Which of the following disturbances would constitute a reportable disturbance for DCS evaluation based on the NERC DCS criteria? The loss of a 700 MW generating unit at 100% output. The loss of the 900 MW generating unit at 60% output. The loss of two 400 MW units 30 seconds apar