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Electrical Engineering (REE) Board Exam 2027 Reviewer & Mock Exam Questions: Free Test

Mariano Luiz King

Mariano Luiz King · PrepPH Founder

Free Electrical Engineering (REE) Board Exam reviewer with mock questions from across its 3 subjects. Try the free sample questions below and read the full explanation for each. No sign-up needed.

Free Electrical Engineering (REE) Board Exam reviewer: mock questions

Questions from across the subtests, picked from core topics. Pick an answer to see whether you got it right, along with the full explanation.

  1. Question 1
    Mathematics

    A fair coin is tossed 3 times. Find the probability of exactly 2 heads.

    Not quite. The answer is: 0.375

    (32)(0.5)2(0.5)1=3(0.125)=0.375\binom{3}{2}(0.5)^2(0.5)^1 = 3(0.125) = 0.375.

  2. Question 2
    Mathematics

    Find the general solution of y'' - 5y' + 6y = 0.

    Not quite. The answer is: y = C₁e^(2x) + C₂e^(3x)

    Characteristic equation r2−5r+6=0⇒(r−2)(r−3)=0r^2-5r+6=0 \Rightarrow (r-2)(r-3)=0, so r=2,3r=2,3 and y=C1e2x+C2e3xy=C_1e^{2x}+C_2e^{3x}.

  3. Question 3
    Engineering Sciences and Allied Subjects

    A 5 kg block rests on a frictionless 30° incline. Find the gravity component along the incline (g=9.81 m/s²).

    Not quite. The answer is: 24.5 N

    F=mgsin⁡30°=5(9.81)(0.5)=24.5F = mg\sin30° = 5(9.81)(0.5) = 24.5 N.

  4. Question 4
    Engineering Sciences and Allied Subjects

    Two point charges, 2 μC and 3 μC, are 0.1 m apart. Find the force between them (k=9×10⁹ Nm²/C²).

    Not quite. The answer is: 5.4 N

    F=kq1q2r2=9×109(2×10−6)(3×10−6)(0.1)2=5.4F = k\frac{q_1q_2}{r^2} = 9\times10^9\frac{(2\times10^{-6})(3\times10^{-6})}{(0.1)^2} = 5.4 N.

  5. Question 5
    Electrical Engineering Professional Subjects

    Two resistors, 6 Ω and 3 Ω, are in parallel. Find the equivalent resistance.

    Not quite. The answer is: 2 Ω

    Req=6×36+3=189=2 ΩR_{eq} = \frac{6\times3}{6+3} = \frac{18}{9} = 2\ \Omega.

  6. Question 6
    Electrical Engineering Professional Subjects

    An induction motor has Ns=1800 rpm and runs at 1746 rpm. Find the slip.

    Not quite. The answer is: 3%

    s=Ns−NNs=1800−17461800=0.03=3%s = \frac{N_s-N}{N_s} = \frac{1800-1746}{1800} = 0.03 = 3\%.

  7. Question 7
    Electrical Engineering Professional Subjects

    A transformer is rated 500 kVA, 13.8 kV / 230 V single-phase. Find its rated secondary full-load current.

    Not quite. The answer is: 2173.9 A

    IFL=SV=500,000230=2173.9I_{FL} = \frac{S}{V} = \frac{500{,}000}{230} = 2173.9 A.

  8. Question 8
    Electrical Engineering Professional Subjects

    A series RLC circuit has L=0.1 H and C=10 μF. Find the resonant frequency.

    Not quite. The answer is: 159.15 Hz

    fr=12πLC=12π(0.1)(10×10−6)=159.15f_r = \frac{1}{2\pi\sqrt{LC}} = \frac{1}{2\pi\sqrt{(0.1)(10\times10^{-6})}} = 159.15 Hz.

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Electrical Engineering (REE) Board Exam reviewer FAQ

What subjects are on the Electrical Engineering (REE) Board Exam?

The Electrical Engineering (REE) Board Exam covers 3 subjects: Mathematics, Engineering Sciences and Allied Subjects, and Electrical Engineering Professional Subjects. Each subject has its own weight in your overall result.

How are the Electrical Engineering (REE) Board Exam subjects weighted?

Using the PRC weighting, Electrical Engineering Professional Subjects carries the largest share at 45%. The full breakdown is Mathematics (25%), Engineering Sciences and Allied Subjects (30%), and Electrical Engineering Professional Subjects (45%).

How should I prioritize my Electrical Engineering (REE) Board Exam review?

Start with the heaviest subject, Electrical Engineering Professional Subjects, but don't ignore the others, since every subject counts toward your result. Practice with questions that explain the answer so you learn the reasoning, and track which topics you keep missing.

Where can I find the official Electrical Engineering (REE) Board Exam schedule and requirements?

Check the Professional Regulation Commission (PRC) website at prc.gov.ph and your Board’s announcements. Schedules, requirements, and rules can change, so confirm the details there before you apply.

Do laws and regulations change on the Electrical Engineering (REE) Board Exam?

They can. Some topics, such as laws, codes, and rates, get amended over time, so check them against the latest official issuances before the exam instead of relying on any single reviewer, including this one.

Can I practice Electrical Engineering (REE) Board Exam questions for free on prepPH?

Yes. The sample questions on this page are free to try without an account. prepPH also has a free plan, and a Premium plan that unlocks unlimited flashcards and weak-topic breakdowns.

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