NERC~RC (NERC Program Pre-Assessment Evaluation Test)
Exam Questions and Answers.
Q31466 When isolating equipment in the electrical system, what device is most often
used as a visual clearance point? - Correct Answer Disconnect switches
Q31457 What does the term Voltage mean in a power system? - Correct Answer
electromotive force that causes electrons to flow
Q31478 What is a good example of inductive load? - Correct Answer Motors
Q31475 Ohm's law is a relationship between three variables, what is that equation? -
Correct Answer Voltage equals current times impedance
Q31542 What would you expect your Area Control Error (ACE) indication to be at the
instant frequency goes to 60.05 Hz? - Correct Answer Positive
Q31452 When an Interconnection's total generation is more than its total load, which
statement is true? - Correct Answer Frequency will be above 60.00 Hz
Q31467 When the current in an AC circuit is doubled, power losses in the circuit will
respond in which way? - Correct Answer Four times greater
Q31477 Frequency of the power system is mainly a factor of which of the following? -
Correct Answer Load and generation balance in the Interconnection
Q31538 The end-use consumer of electricity is primarily served from which electric
power system level? - Correct Answer Distribution System
Q31534 Power production on an electric power system is the product of _______? -
Correct Answer Voltage and Current
Q31539 When a transmission line is absorbing reactive power, VARs from the system,
the line is exhibiting which characteristics? - Correct Answer Inductive
Q31459 What does the term power factor mean? - Correct Answer The ratio of real
power to apparent power
, Q31533 What are the governor control systems designed to do? - Correct Answer
Arrest declining frequency
Q31476 What does the current squared times resistance indicate? - Correct Answer
Power Losses
Q31439 A generator is a machine that produces energy. Which of the following
statements best describes this process? - Correct Answer A generator converts
mechanical energy to electrical energy
Q31536 What is the primary source of voltage in an electric power system? - Correct
Answer Generators
Q31549 Analysis tools are unavailable due to planned maintenance, what should the
System Operator do? - Correct Answer Mitigate the impact of the analysis tool outage
Q31545 Power flow on the Bulk Power System follows certain 'rules'. In general, which
direction will reactive power flow? - Correct Answer From a higher voltage to a lower
voltage
Q31541 Why would a power company purchase generation from another company
versus generating themselves to meet their load? - Correct Answer For Economics
FB: Balancing Authorities should plan on meeting Load demand and maintaining
generation reserves for emergencies. If a BA is purchasing it is usually because they
can purchase generation more economical than starting generators for a short time.
Only in extreme situations are many generators out of service in a BA causing a
shortage of generation in its BA.
Q31544 A System Operator is unable to restore power balance and are in emergency
ranges. Corrective actions have not been adequate, what shall they consider? - Correct
Answer Implement firm load shed
Q31471 Reactive power is needed to support which type of load? - Correct Answer
Inductive
Q31463 If there is 150 MW flowing into a 200 MVA 100 kV/230 kV transformer. How
many MW is flowing out of the transformer? - Correct Answer 150 MW
Exam Questions and Answers.
Q31466 When isolating equipment in the electrical system, what device is most often
used as a visual clearance point? - Correct Answer Disconnect switches
Q31457 What does the term Voltage mean in a power system? - Correct Answer
electromotive force that causes electrons to flow
Q31478 What is a good example of inductive load? - Correct Answer Motors
Q31475 Ohm's law is a relationship between three variables, what is that equation? -
Correct Answer Voltage equals current times impedance
Q31542 What would you expect your Area Control Error (ACE) indication to be at the
instant frequency goes to 60.05 Hz? - Correct Answer Positive
Q31452 When an Interconnection's total generation is more than its total load, which
statement is true? - Correct Answer Frequency will be above 60.00 Hz
Q31467 When the current in an AC circuit is doubled, power losses in the circuit will
respond in which way? - Correct Answer Four times greater
Q31477 Frequency of the power system is mainly a factor of which of the following? -
Correct Answer Load and generation balance in the Interconnection
Q31538 The end-use consumer of electricity is primarily served from which electric
power system level? - Correct Answer Distribution System
Q31534 Power production on an electric power system is the product of _______? -
Correct Answer Voltage and Current
Q31539 When a transmission line is absorbing reactive power, VARs from the system,
the line is exhibiting which characteristics? - Correct Answer Inductive
Q31459 What does the term power factor mean? - Correct Answer The ratio of real
power to apparent power
, Q31533 What are the governor control systems designed to do? - Correct Answer
Arrest declining frequency
Q31476 What does the current squared times resistance indicate? - Correct Answer
Power Losses
Q31439 A generator is a machine that produces energy. Which of the following
statements best describes this process? - Correct Answer A generator converts
mechanical energy to electrical energy
Q31536 What is the primary source of voltage in an electric power system? - Correct
Answer Generators
Q31549 Analysis tools are unavailable due to planned maintenance, what should the
System Operator do? - Correct Answer Mitigate the impact of the analysis tool outage
Q31545 Power flow on the Bulk Power System follows certain 'rules'. In general, which
direction will reactive power flow? - Correct Answer From a higher voltage to a lower
voltage
Q31541 Why would a power company purchase generation from another company
versus generating themselves to meet their load? - Correct Answer For Economics
FB: Balancing Authorities should plan on meeting Load demand and maintaining
generation reserves for emergencies. If a BA is purchasing it is usually because they
can purchase generation more economical than starting generators for a short time.
Only in extreme situations are many generators out of service in a BA causing a
shortage of generation in its BA.
Q31544 A System Operator is unable to restore power balance and are in emergency
ranges. Corrective actions have not been adequate, what shall they consider? - Correct
Answer Implement firm load shed
Q31471 Reactive power is needed to support which type of load? - Correct Answer
Inductive
Q31463 If there is 150 MW flowing into a 200 MVA 100 kV/230 kV transformer. How
many MW is flowing out of the transformer? - Correct Answer 150 MW
