Practice Test NERC Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed
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Course
NERC
Institution
NERC
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?
-:- The phase angle will increase. When load is increased phase ang...
Practice Test NERC Questions & 100%
Correct Answers- Latest Test | Graded A+ |
Passed
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?
✓ -:- 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?
✓ -:- 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?
✓ -:- 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?
Which of the following types of MW load is the most impacted by an intentional frequency
reduction?
✓ -:- Motor
Assume there are two 250 mile long transmission lines exporting an excessive amount of
MW from a generation area to a load area. One of the lines suddenly trips and the area
power system collapses within a few seconds. The most likely cause of the collapse?
✓ -:- Angle Instability
The phase voltage in a wye-connected load is 277 V. What is the line to line voltage?
✓ -:- 480 V
A simple power system is composed of three lines connecting generation to load. Each lines
the same impedance, is initially loaded at 200 MW, and has a thermal limit of 400 MW. If
one line trips, what the loading on the shortest remaining line be and will the thermal limit
either remaining line be violated?
✓ -:- 300 MW and No
The best prediction of system load is the load forecast tool that uses?
✓ -:- Forecasted Weather
4|Page | Grade A+| 2024/2025
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