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- Thread starter Gman
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EDIT: See below. I actually had the corrected version so I may have misled the OP.

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Yes. NCEES released an errata clarifying and correcting this (and I think 3 other problems).View attachment 21490

The answer key says A,B,D so that's wrong right? A is incorrect but B and D are?

Zero-sequence phasors have the same magnitude and same phase angle. There is no angular displacement between the zero-sequence phasors.

Positive-sequence phasors have the same magnitude, but 120-degree angular displacement rotating in the direction of ABC.

Negative-sequence phasors have the same magnitude, but 120-degree angular displacement rotating in the direction of ACB (or CBA).

account.ncees.org > Exam Prep > PE > PE Electrical and Computer: Power Practice Exam > View Product > Preview this book now

The answer was changed to just A and B since C is incorrect.

Zero sequence phasors are all equal in magnitude but have a zero-degree displacement angle between phases since the angle of each zero-sequence phasor is the same.

Edit - Beatin by @akyip!

Why A is correct? and why E is incorrect?

account.ncees.org > Exam Prep > PE > PE Electrical and Computer: Power Practice Exam > View Product > Preview this book now

The answer was changed to just A and B since C is incorrect.

Zero sequence phasors are all equal in magnitude but have a zero-degree displacement angle between phases since the angle of each zero-sequence phasor is the same.

Edit - Beatin by @akyip!

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The errata revised the multiple choices so A is the The Three Positive sequence Voltage phasors instead of the Zero Sequence current phasors, making the solution description correct.Why A is correct? and why E is incorrect?

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