# Free PE Power Practice Exam Problems

The Principles and Practice of Engineering (PE) Power exam is the final step in becoming a licensed professional engineer. The PE power exam consists of 80 questions, which will be difficult to answer if you aren’t familiar with the type of questions likely to be appearing in the exam.

We have covered some NCEES® PE Power practice exam problems and their solutions in this article to take you out of this difficulty. Solving the PE Power practice questions will help you grasp the concepts and give you an idea about where you stand, ultimately leading you to better prepare for the PE Power exam.

Not to forget, the PE power exam is eight-hour-long, so time management is the key as you will only have six minutes to solve each problem. Solving PE Power Practice Exam Problems helps you get an idea about how much time each question will take, enabling you to answer the maximum number of questions in the minimum amount of time in the exam.

### Sample Practice Problems For PE Power Exam

#### Problem #1

#### A 13.2∠0° kV line serves a three-phase, 500 kVA load. The power factor of the load is 0.85 leading. What is the load's line to neutral impedance?

#### A 13.2∠0° kV line serves a three-phase, 500 kVA load. The power factor of the load is 0.85 leading. What is the load's line to neutral impedance?

#### Problem #2

#### A three-phase, wye-connected, balanced load with a 480 V (line voltage) rating consumes 100 kW. What is the new power consumption if one of the load's phases is removed (𝑍𝑍𝑝𝑝ℎ𝑎𝑎𝑎𝑎𝑎𝑎 𝐴𝐴 = 0)? Assume a 1.0 power factor.

#### A three-phase, wye-connected, balanced load with a 480 V (line voltage) rating consumes 100 kW. What is the new power consumption if one of the load's phases is removed (𝑍𝑍𝑝𝑝ℎ𝑎𝑎𝑎𝑎𝑎𝑎 𝐴𝐴 = 0)? Assume a 1.0 power factor.

#### Problem #3

#### Power is supplied to a load with an impedance of 10 + j0 ohms using a single-phase, 120V (RMS) AC power source. This load is also in series with a 120V battery. What is the maximum voltage at the resistor?

#### Power is supplied to a load with an impedance of 10 + j0 ohms using a single-phase, 120V (RMS) AC power source. This load is also in series with a 120V battery. What is the maximum voltage at the resistor?

#### Problem #4

#### In a three-phase generator, a line-to-line fault occurs between phases A and B. What is the sum of the short circuit currents through all three phases (A, B, and C)? Assume that there is no neutral, and the impedances of the positive, negative, and zero sequences are equal to 0.01 pu.

#### In a three-phase generator, a line-to-line fault occurs between phases A and B. What is the sum of the short circuit currents through all three phases (A, B, and C)? Assume that there is no neutral, and the impedances of the positive, negative, and zero sequences are equal to 0.01 pu.

#### Problem #5

#### Which of the following is unlikely to be the principal reason for bonding or electrically connecting two objects together?

#### Which of the following is unlikely to be the principal reason for bonding or electrically connecting two objects together?

### Frequently Asked Questions

The PE Power practice exam comprises questions similar to those on the actual exam, so working through PE practice problems will help you approach each question with logical thinking.

The PE power practice exam allows you to practice taking the Principles and Practice of Engineering (PE) examination. It is believed that this experience will make you more comfortable and prepared on the day of the exam.

Moreover, PE Power practice exams can help you assess your knowledge and knowledge gaps. It mirrors the structure, style, and complexity, includes prior exam problems, and offers solutions or performance evaluations for each subject area.

Studying for the PE Power exam must include getting familiar with the relevant equations, solutions, and critical details. You can only accomplish this if you practice a lot. So, set a target to answer a particular number of **PE exam sample questions** daily.

Studying for the PE Power exam must include getting familiar with the relevant equations, solutions, and critical details. You can only accomplish this if you practice a lot. So, set a target to answer a particular number of **PE exam sample questions** daily.

There is no specific passing score for the PE Power exam that NCEES® has established. However, the average passing percentage for the PE Power exam is estimated to be around 70%.

It implies that you must correctly respond to nearly 70% of the questions, that is approximately 56 out of 80 correct answers. Remember that this pass rate is based only on the student’s experiences and is not always accurate.

Although it can vary for each person as each student has a different skill level, ideally, you should start preparing for the PE power exam four months before the test date, averaging up to 200-300 hours.

You should dedicate at least two to four hours a day and five days a week. The least you can start studying is three months before the PE power exam, which will take approximately 150-200 hours. For example, your PE power exam is due in June. In that case, you should begin preparing for it in March.