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100+ Free PRC Mechanical Engineer Practice Questions
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A machine costing P200,000 has a salvage value of P20,000 after 10 years. Using straight-line depreciation, the annual depreciation charge is:
A
B
C
D
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2026 Statistics
Key Facts: PRC Mechanical Engineer Exam
70%
Passing Average
RA 8495
50%
Minimum Subject Rating
RA 8495 IRR
3
Board Subjects
PRC Board of ME
35%
Power Plant Weight
PRC syllabi
2 days
Exam Schedule
PRC
RA 8495
Governing Law
PRC
The PRC Mechanical Engineer Licensure Examination (MELE) requires a general weighted average of at least 70% with no rating below 50% in any subject. It spans three board subjects weighted 30/35/35: Machine Design, Materials and Shop Practice; Industrial and Power Plant Engineering; and Mathematics, Engineering Economics and Basic Engineering Sciences. The exam is governed by RA 8495 and the Philippine Mechanical Engineering Code, administered by the PRC Board of Mechanical Engineering over two days.
Sample PRC Mechanical Engineer Practice Questions
Try these sample questions to test your PRC Mechanical Engineer exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1In the Philippine Mechanical Engineer Licensure Examination (MELE), a candidate must obtain a general weighted average of at least what percentage, with no individual subject rating falling below a stated floor?
A.75% average, no rating below 60%
B.60% average, no rating below 40%
C.80% average, no rating below 70%
D.70% average, no rating below 50%
Explanation: Under RA 8495 and its IRR, a candidate for Mechanical Engineer must obtain a general average of at least 70% across all subjects with no rating below 50% in any subject. Falling below 50% in even one subject is disqualifying regardless of the average.
2The MELE is divided into three board subjects. Which subject carries the 30% weighting?
A.Industrial and Power Plant Engineering
B.Mathematics, Engineering Economics and Basic Engineering Sciences
C.Machine Design, Materials and Shop Practice
D.Refrigeration and Air Conditioning
Explanation: Per the RA 8495 IRR exam structure, Machine Design, Materials and Shop Practice is weighted 30%, while Industrial and Power Plant Engineering and Mathematics/Engineering Economics/Basic Engineering Sciences each carry 35%.
3A solid circular shaft transmits a torque T. If the shaft diameter is doubled while T is held constant, the maximum torsional shear stress on the surface becomes what fraction of the original stress?
A.1/8 of the original
B.1/2 of the original
C.1/4 of the original
D.1/16 of the original
Explanation: For a solid circular shaft, torsional shear stress is tau = 16T/(pi*d^3). Stress varies inversely with the cube of the diameter, so doubling d divides the stress by 2^3 = 8.
4In an ideal Rankine cycle, which process occurs in the boiler?
A.Isentropic expansion
B.Isentropic compression
C.Constant-pressure heat addition
D.Constant-pressure heat rejection
Explanation: The Rankine cycle boiler adds heat to the working fluid at essentially constant pressure, converting compressed liquid to superheated steam. The turbine performs isentropic expansion, the pump isentropic compression, and the condenser constant-pressure heat rejection.
5The coefficient of performance (COP) of a refrigerator operating on a reversed Carnot cycle between a cold reservoir at TL and a hot reservoir at TH is given by which expression?
A.TH / (TH - TL)
B.(TH - TL) / TL
C.TH / TL
D.TL / (TH - TL)
Explanation: For a Carnot refrigerator, COP = desired effect / work = TL/(TH - TL), with temperatures in absolute units. The numerator is the cold-reservoir temperature because the useful effect is heat removed from the cold space.
6Under the Philippine Mechanical Engineering Code, a high-pressure boiler is one that furnishes steam at a gauge pressure in excess of which value?
A.15 psi (103.4 kPa)
B.100 psi (689 kPa)
C.30 psi (207 kPa)
D.5 psi (34.5 kPa)
Explanation: The PME Code defines a high-pressure boiler as one furnishing steam at gauge pressure exceeding 15 psi (103.4 kPa), or hot water above 250 deg F or above 160 psi. Below this threshold a steam boiler is classed as low-pressure.
7For a belt drive, the ratio of tight-side tension T1 to slack-side tension T2 (neglecting centrifugal effects) is governed by which relationship, where f is the coefficient of friction and theta is the angle of wrap?
A.T1/T2 = f*theta
B.T1 - T2 = f*theta
C.T1/T2 = theta/f
D.T1/T2 = e^(f*theta)
Explanation: The belt-friction (capstan) equation gives T1/T2 = e^(f*theta), where theta is in radians. The tension ratio grows exponentially with both the friction coefficient and the angle of contact.
8A car accelerates uniformly from rest to 20 m/s in 8 seconds. What distance does it travel during this interval?
A.160 m
B.40 m
C.200 m
D.80 m
Explanation: With uniform acceleration from rest, distance equals average velocity times time: s = (0 + 20)/2 * 8 = 10 * 8 = 80 m. Equivalently a = 2.5 m/s^2 and s = 0.5*a*t^2 = 0.5*2.5*64 = 80 m.
9In a four-stroke spark-ignition engine, how many crankshaft revolutions are required to complete one full thermodynamic cycle in a single cylinder?
A.1 revolution
B.4 revolutions
C.0.5 revolution
D.2 revolutions
Explanation: A four-stroke engine completes intake, compression, power, and exhaust strokes over two crankshaft revolutions (720 degrees). Each stroke corresponds to a half-revolution of the crank, so one power stroke occurs every two revolutions.
10The derivative of the function f(x) = ln(3x^2) with respect to x is:
A.1/(3x^2)
B.6x
C.3/x
D.2/x
Explanation: Using ln(3x^2) = ln 3 + 2 ln x, the derivative is d/dx[2 ln x] = 2/x. Equivalently by chain rule, (1/(3x^2)) * 6x = 6x/(3x^2) = 2/x.
About the PRC Mechanical Engineer Practice Questions
Verified exam format metadata for PRC Mechanical Engineer Licensure Examination (MELE) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.