NERC RANDOM Questions | Actual Questions and Answers
Latest Updated 2026/2027 (Graded A+)
•
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 has the largest magnitude?
•
a) Real Power
b) Apparent Power
c) Reactive Power
d) Hydro Power
- ✔✔b) Apparent Power
•
How are generators typically classified in the power system?
•
a) Fuel source
b) Cycling capability
c) Capacity
d) Generating voltage
- ✔✔a) Fuel source
•
When Interconnection frequency is below 60.00 Hertz, how do Balancing Authorities support
Interconnection Frequency?
Latest Updated 2026/2027 (Graded A+)
•
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 has the largest magnitude?
•
a) Real Power
b) Apparent Power
c) Reactive Power
d) Hydro Power
- ✔✔b) Apparent Power
•
How are generators typically classified in the power system?
•
a) Fuel source
b) Cycling capability
c) Capacity
d) Generating voltage
- ✔✔a) Fuel source
•
When Interconnection frequency is below 60.00 Hertz, how do Balancing Authorities support
Interconnection Frequency?
