Mechanical Engineering (ME) Board Exam 2027 Reviewer & Mock Exam Questions: Free Test

Mariano Luiz King · PrepPH Founder

Free Mechanical Engineering (ME) 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 Mechanical Engineering (ME) 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.

Question 1
Power and Industrial Plant Engineering (PIPE)
A steam plant has a heat input of 500 MW and produces 175 MW of electrical output. What is its thermal efficiency?
Not quite. The answer is: 35%
Topic: Steam, diesel, gas turbine, and hydroelectric plant engineering.
Formula: $\eta = W_{out}/Q_{in}$ .
Step 1: Divide output by input: $175/500$ .
Result: $\eta = 0.35 = 35\%$ .
Question 2
Power and Industrial Plant Engineering (PIPE)
An air-standard Otto cycle has a compression ratio of 8. What is its ideal thermal efficiency? (Use k = 1.4)
Not quite. The answer is: 56.5%
Topic: Internal combustion engines.
Formula: $\eta = 1 - \dfrac{1}{r^{\,k-1}}$ .
Step 1: Compute $r^{k-1} = 8^{0.4}$ .
Step 2: $\ln(8) = 2.0794$ ; multiply by 0.4 = 0.8318; $e^{0.8318} = 2.297$ .
Step 3: $\eta = 1 - 1/2.297 = 1 - 0.4353$ .
Result: $\eta = 0.5647 \approx 56.5\%$ .
Question 3
Power and Industrial Plant Engineering (PIPE)
A hydroelectric plant has a flow rate of 15 m³/s, a net head of 40 m, and an overall efficiency of 85%. What is the electrical power output? (Use ρ = 1000 kg/m³, g = 9.81 m/s²)
Not quite. The answer is: 5.0 MW
Topic: Steam, diesel, gas turbine, and hydroelectric plant engineering.
Formula: $P = \rho g Q H \eta$ .
Step 1: $\rho g = 1000 \times 9.81 = 9810$ .
Step 2: Multiply by Q: $9810 \times 15 = 147{,}150$ .
Step 3: Multiply by H: $147{,}150 \times 40 = 5{,}886{,}000$ .
Step 4: Apply efficiency: $5{,}886{,}000 \times 0.85 = 5{,}003{,}100\text{ W}$ .
Result: $P \approx 5.0\text{ MW}$ .
Question 4
Mathematics, Engineering Economics and Basic Engineering Sciences (MEEBES)
Two forces act on a bolt: 100 N at 0 degrees and 150 N at 90 degrees. What is the magnitude of the resultant force?
Not quite. The answer is: ~180.3 N
Topic: Engineering mechanics.
Formula: For perpendicular forces, $R = \sqrt{F_1^2+F_2^2}$ .
Step 1: $100^2 + 150^2 = 10{,}000 + 22{,}500 = 32{,}500$ .
Result: $R = \sqrt{32{,}500} \approx 180.3$ N.
Question 5
Mathematics, Engineering Economics and Basic Engineering Sciences (MEEBES)
A car of mass 1200 kg traveling at 20 m/s brakes to a complete stop over 40 m. Using the work-energy theorem, what average braking force is required (ignoring other resistances)?
Not quite. The answer is: 6000 N
Topic: Engineering mechanics.
Formula: Work done by braking force equals the initial kinetic energy: $Fd = \tfrac{1}{2}mv^2$ .
Step 1: $KE = 0.5 \times 1200 \times 20^2 = 240{,}000\text{ J}$ .
Step 2: Solve for F: $F = 240{,}000/40$ .
Result: $F = 6000$ N.
Question 6
Machine Design and Shop Practice (MDSP)
A CNC lathe is set to turn a 50 mm diameter shaft at a cutting speed of 100 m/min. What spindle speed should be used? ( $N = 1000V/(\pi D)$ , V in m/min, D in mm)
Not quite. The answer is: ~637 rpm
Topic: Shop practice.
Formula: $N = 1000V/(\pi D)$ .
Step 1: Numerator: $1000 \times 100 = 100{,}000$ .
Step 2: Denominator: $3.1416 \times 50 \approx 157.08$ .
Result: $N \approx 637$ rpm.
Question 7
Machine Design and Shop Practice (MDSP)
A shaft must transmit 15 kW of power at 1200 rpm. What torque must the shaft be designed to handle?
Not quite. The answer is: ~119.4 N.m
Topic: Machine element design.
Formula: $P = \dfrac{2\pi NT}{60}$ , solved for T: $T = \dfrac{60P}{2\pi N}$ .
Step 1: Numerator: $60 \times 15{,}000 = 900{,}000$ .
Step 2: Denominator: $2\pi \times 1200 \approx 7539.8$ .
Result: $T \approx 119.4$ N.m.
Question 8
Mathematics, Engineering Economics and Basic Engineering Sciences (MEEBES)
A circular shaft with a 40 mm diameter is subjected to a torque of 800 N.m. What is the maximum shear stress?
Not quite. The answer is: ~63.7 MPa
Topic: Strength of materials.
Formula: $\tau = Tr/J$ , with $J = \pi d^4/32$ .
Step 1: $J = \pi(0.04)^4/32 \approx 2.513\times10^{-7}\text{ m}^4$ .
Step 2: $r = 0.02$ m, so $\tau = 800 \times 0.02 / 2.513\times10^{-7}$ .
Result: $\tau \approx 63.7$ MPa.

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Mechanical Engineering (ME) Board Exam reviewer FAQ

What subjects are on the Mechanical Engineering (ME) Board Exam?

The Mechanical Engineering (ME) Board Exam covers 3 subjects: Power and Industrial Plant Engineering (PIPE), Mathematics, Engineering Economics and Basic Engineering Sciences (MEEBES), and Machine Design and Shop Practice (MDSP). Each subject has its own weight in your overall result.

How are the Mechanical Engineering (ME) Board Exam subjects weighted?

Using the PRC weighting, Power and Industrial Plant Engineering (PIPE) carries the largest share at 37.5%. The full breakdown is Power and Industrial Plant Engineering (PIPE) (37.5%), Mathematics, Engineering Economics and Basic Engineering Sciences (MEEBES) (29.2%), and Machine Design and Shop Practice (MDSP) (33.3%).

How should I prioritize my Mechanical Engineering (ME) Board Exam review?

Start with the heaviest subject, Power and Industrial Plant Engineering (PIPE), 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 Mechanical Engineering (ME) 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 Mechanical Engineering (ME) 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 Mechanical Engineering (ME) 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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