Electrical Engineering Power PE Sample Exam

Electrical Engineering Power PE Sample Exam
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Working through sample PE Exam questions is one of the most efficient methods of preparing for exam.

Spend time understanding the intent of the question (i.e. what is the question writer actually testing you on)
Find useful resources that help answer the questions in the Sample Exam (and similar questions)
Assemble your resources into a system that you can use on exam day

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Sample Exam

You will receive an email with your quiz results and be directed to the solutions
for all the questions after selecting the See Results button at the end of the exam.

You will see references in the solutions
that link to additional information.
We recommend you use the PE Electrical and Computer: Power Reference Handbook
to solve the problem or answer the question and then use the additional information
to strengthen your knowledge of the topic.

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1 / 40

EEP SE-01 - Calculate the turn ratio for a current transformer with 220-amp primary side current and 11-amp secondary side current? Assume the primary side has 3 turns.

a. 1:30

b. 1:60

c. 1:90

d. 1:120

2 / 40

EEP SE-02 - A motor with an operating voltage of 460 volts should have a minimum insulation resistance of _____ megohms.

a. 0.37

b. 0.41

c. 0.46

d. 0.53

3 / 40

EEP SE-03 - The ground resistance test rod placement shown below is used for the __________ method of ground resistance testing.

a. Wenner

b. Schlumberger

c. Variation of Depth

d. Dead Earth

4 / 40

EEP SE-04 - The __________ class of lightning protector provides the lowest level of protection and diverts the least amount of energy.

a. Station

b. Intermediate

c. Distribution

d. Secondary

5 / 40

EEP SE-05 - Underwriter Laboratories (UL) requires that Type 3, Point of Utilization Surge Protection Devices be located within _____ feet of the panel.

a. 10

b. 15

c. 25

d. 30

6 / 40

EEP SE-06 - Calculate the mean time to failure (MTTF) for a piece of equipment with a failure rate of 2.3 failures per 30 days. This equipment operates 20 hours a day/365 days per year.

a. 13.00 hours

b. 95.59 hours

c. 178.17 hours

d. 260.76 hours

7 / 40

EEP SE-07 - The projected illumination in foot-candles for the room shown is most nearly:

a. 41 FC

b. 46 FC

c. 53 FC

d. 60 FC

8 / 40

EEP SE-08 - A factory currently has a demand of 430 kVA with a power factor of 0.89. If the factory installs a capacitor bank to increase the power factor to 0.96, the new billing demand would be most nearly:

a. 389.7 kVA

b. 392.1 kVA

c. 395.5 kVA

d. 398.6 kVA

9 / 40

EEP SE-09 - The straight-line depreciation for a new fabricator with an initial cost of $3,000,000, a useful life of 12 years, and a salvage value of $150,000 is most nearly:

a. $237,500 per year

b. $258,760 per year

c. $281,810 per year

d. $300,000 per year

10 / 40

EEP SE-10 - The substation grounding resistance for the following ground grid is most nearly:

Average earth resistivity = 225 Ω-m
Ground grid = 36 ft x 36 ft
Length of grounding conductors = 3 ft

a. 8.3Ω

b. 8.7Ω

c. 9.1Ω

d. 9.5Ω

11 / 40

EEP SE-11 - What is the code required copper grounding conductor size for a building with a 600 kcmil aluminum service conductor?

a. 4

b. 2

c. 2/0

d. 1/0

12 / 40

EEP SE-12 - Hydrogen is an example of a Group _____ flammable gas.

a. A

b. B

c. C

d. D

13 / 40

EEP SE-13 - Calculate the Apparent Power (S) in a 120-volt, 60 Hz AC circuit with a resistance of 60 ohms and an inductance of 85 mH.

a. 189.2 VA

b. 205.6 VA

c. 211.7 VA

d. 219.0 VA

14 / 40

EEP SE-14 - The line currents in a 3-phase, 4-wire system are I_a = 62∠10°, I_b = 37∠115°, and I_c = 95∠277°. The positive symmetrical component (I_a1) is most nearly?

a. 16.9∠159.7°A

b. 50.8∠159.7°A

c. 47.61 + j17.58

d. -47.61 + j17.58

15 / 40

EEP SE-15 - For the 3-phase system shown, calculate the base impedance for each zone. Assume base power (S_B) = 30MVA and the base voltages are: V_B1 = 10kV, V_B2 = 50kV, and V_B3 = 10kV.

a. 3.3Ω, 3.3Ω, 3.3Ω

b. 3.3Ω, 3.3Ω, 83.3Ω

c. 3.3Ω, 83.3Ω, 3.3Ω

d. 83.3Ω, 3.3Ω, 3.3Ω

16 / 40

EEP SE-16 - In the following circuit, the voltage across the resistor (V_R) is 19V and the voltage across the inductor (V_L) is 24V. Calculate the supply voltage.

a. 5.0V

b. 30.6V

c. 36.8V

d. 43.0V

17 / 40

EEP SE-17 - The reactance and current flow in the following circuit is most nearly:

a. 3.782 Ω, 2.37 A

b. 4.016 Ω, 2.44 A

c. 4.524 Ω, 2.65 A

d. 4.768 Ω, 2.77 A

18 / 40

EEP SE-18 - Battery cut-off voltage is the __________.

a. voltage that generally defines the “empty” state of the battery

b. reference voltage of the battery

c. total amp-hours available when the battery is discharged at a certain discharge current

d. maximum available power per unit mass

19 / 40

EEP SE-19 - Which of the following is not one of the four main stages of a basic power supply unit?

a. Transformer

b. Rectifier

c. Filter

d. Integrator

20 / 40

EEP SE-20 - The Boolean logic table shown represents which type of operator?

a. AND

b. OR

c. NAND

d. NOR

21 / 40

EEP SE-21 - An AC induction motor's speed depends on the __________.
I. voltage of the applied power
II. frequency of the applied power
III. current of the applied power
IV. number of motor poles

a. I & II

b. I & III

c. II & III

d. II & IV

22 / 40

EEP SE-22 - A 25 hp motor operating at 3600 rpm will develop what torque?

a. 29.34 lb-ft

b. 32.07 lb-ft

c. 36.46 lb-ft

d. 40.92 lb-ft

23 / 40

EEP SE-23 - The equivalent resistance for the circuit shown is most nearly:

a. 0.43Ω

b. 24Ω

c. 224Ω

d. 420Ω

24 / 40

EEP SE-24 - The minimum starting current for a 240-volt, 3-phase, 10 Hp motor with a code letter J is most nearly:

a. 125.97 amps

b. 138.24 amps

c. 155.16 amps

d. 170.80 amps

25 / 40

EEP SE-25 - Which of the following is a parasitic eddy loss in an electrical machine?
I. Induced currents in all metallic components
II. Friction and winding losses
III. Losses in auxiliary equipment
IV. Losses in bearings

a. I, II, & III

b. I, II, & IV

c. I, III, & IV

d. II, III, & IV

26 / 40

EEP SE-26 - The secondary phase current for a 125 kVA, 480-volt to 208Y/120V, 3-phase, delta-wye transformer is most nearly:

a. 347 amps

b. 352 amps

c. 356 amps

d. 361 amps

27 / 40

EEP SE-27 - The inductive reactance of a Line Reactor with a rated inductance of 450 mH connected to a 120 volt, 60 Hz AC circuit is most nearly:

a. 158.7 ohms

b. 163.2 ohms

c. 169.6 ohms

d. 172.4 ohms

28 / 40

EEP SE-28 - What size capacitor is required to adjust for the lagging (inductive) power factor in a 240V/3Φ/60Hz electrical circuit with 1.685 kVAR reactive power (Q)?

a. 50 mF

b. 60 mF

c. 70 mF

d. 80 mF

29 / 40

EEP SE-29 - What is the voltage drop for a 480-volt, 3-phase 2/0 aluminum feeder routed 2000 ft in a PVC conduit? The current is 60 amps.

a. 23.97 volts

b. 26.14 volts

c. 33.31 volts

d. 35.86 volts

30 / 40

EEP SE-30 - What percent voltage regulation occurs at the receiving end of a distribution line where the voltage at no load = 21 volts and the voltage at full load = 440 volts?

a. 93.7%

b. 95.2%

c. 97.5%

d. 99.1%

31 / 40

EEP SE-31 - Calculate the Power Factor for the 120-volt, 60 Hz AC circuit in question EEP SE-13.

a. 0.882

b. 0.955

c. 1.063

d. 1.741

32 / 40

EEP SE-32 - IEEE Standard 1159 lists 7 major categories of power quality disturbances. Which of the following is not one the seven major categories?

a. Transients

b. Short-Duration Variations

c. Medium-Duration Variations

d. Long-Duration Variations

33 / 40

EEP SE-33 - The available fault current for a main circuit breaker with an allowable interrupting rating of 42,000 amps in a 480-volt, 3-phase system is most nearly:

a. 29.46 MVA

b. 32.08 MVA

c. 34.92 MVA

d. 38.25 MVA

34 / 40

EEP SE-34 - The secondary phase-to-neutral voltage for the transformer shown (with a 12:1 turns ratio) would be most nearly:

a. 7.2V

b. 12.5V

c. 50.0V

d. 86.6V

35 / 40

EEP SE-35 - What is the main difference between a Branch Circuit and a Feeder?

a. A Feeder runs between an overcurrent protection device and a load

b. A Branch Circuit runs between two overcurrent protection devices

c. A Feeder runs between two overcurrent protection devices

d. There is no difference between the two

36 / 40

EEP SE-36 - What size circuit breaker is required for the following continuous loads being served by a single circuit:
● 20 amps
● 23 amps
● 18 amps
● 14 amps

a. 85 amp

b. 90 amp

c. 95 amp

d. 100 amp

37 / 40

EEP SE-37 - Circuit breaker rejection tabs prevent circuit breakers from being installed in load centers with unnotched tabs thus limiting the number of circuits available and preventing the load center from being overloaded. This is referred to as _______________.

a.a. breaker rejection

b. circuit limiting

c. circuit overloading

d. circuit preventing

38 / 40

EEP SE-38 - _______________ type protective relays use electromagnets to act as a stator energized by relay coils.

a. Solenoid

b. Balanced Beam

c. Induction Disc

d. Induction Cup

39 / 40

EEP SE-39 - What size fuse is required to protect a continuous duty, 30hp, 480-volt, 3-phase motor with a service factor of 1.21, a marked temperature rise of 35°C, and a current rating of 39 amps?

a. 40 amp fuse

b. 45 amp fuse

c. 50 amp fuse

d. 60 amp fuse

40 / 40

EEP SE-40 - Which of the following is not one of the four basic circuit breaker curves to be used with thermal magnetic molded case circuit breakers:

a. Overload Region

b. Instantaneous Region

c. Interrupting Rating

d. Latching Time

Your score is

The Electrical Engineering Power PE Sample Exam is designed to help you prepare for the PE Exam by following these three steps:

Work through the information in the Sample Exam … follow the references … dig deep.
- following the references/links for the problems will expand your knowledge of the subject.
Work as many problems as you can find and note where you have difficulties.
- working the problems in the Sample Exam plus any additional examples you can find is an excellent test preparation method.
Take the time to put together a comprehensive Test-Prep Resource Library^©
- the Test-Prep Resource Library^© is my #1 recommendation for everyone preparing for the PE Exam.

NOTE: As per the NCEES Examinees Guide, books, notes, notebooks, etc. are no longer permitted in the testing room. This does not diminish the importance of a Test-Prep Resource Library^©as a method of study and preparation. Taking the time to assemble your own library will naturally help you categorize and document your study materials, help you determine what’s essential to pass the exam, and keep all your resources in one easy to access tool.

Remember, this is a process. If you will do these things, you will be successful!

Spend time every day gathering information
Work the example problems in the Sample Exam
Assemble the resources into an organized system