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100+ Free MPLE Board Exam Practice Questions

PRC Master Plumber Licensure Examination practice questions are available now; exam metadata is being verified.

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PRC Registered Master Electrician (RME) Licensure Examination (Philippines)

Practice Questions
2026 Statistics

Key Facts: MPLE Board Exam Exam

70%

Passing Average

Widely cited MPLE / PRC board practice

10%

Plumbing Arithmetic

RA 1378 Sec. 13 / PRC coverage notices

40%

Sanitation & Design

RA 1378 Sec. 13 / PRC coverage notices

10%

Plumbing Code

RA 1378 Sec. 13 / PRC coverage notices

40%

Practical Problems

Current PRC MPLE coverage notices

2 days

Exam Duration

PRC MPLE administration practice

The PRC Master Plumber board exam (MPLE) under RA 1378 is a two-day objective examination weighted Plumbing Arithmetic 10%, Sanitation/Design & Installation 40%, Plumbing Code 10%, and Practical Problems 40%. Candidates generally need a 70% general average with no subject below 50%. This free bank offers 100 practice questions across those four domains, grounded in the Revised National Plumbing Code and trade practice.

Sample MPLE Board Exam Practice Questions

Try these sample questions to test your MPLE Board Exam exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A rectangular concrete water tank has an interior floor measuring 4.0 m by 2.5 m. What is the floor area?
A.6.5 m²
B.13.0 m²
C.20.0 m²
D.10.0 m²
Explanation: Area of a rectangle equals length times width: 4.0 m × 2.5 m = 10.0 m². Master plumbers use this basic calculation when estimating tank capacity, liner area, or floor drains serving a tank room.
2Using π ≈ 3.14, what is the approximate cross-sectional area of a circular pipe with an inside diameter of 100 mm?
A.314 mm²
B.7,850 mm²
C.31,400 mm²
D.1,570 mm²
Explanation: Convert diameter to radius: r = 50 mm. Area = πr² ≈ 3.14 × 50² = 3.14 × 2,500 = 7,850 mm². Pipe cross-sectional area is the starting point for velocity and flow-rate calculations (Q = A × V).
3Water flows through a full pipe at an average velocity of 1.5 m/s. If the pipe's internal cross-sectional area is 0.0020 m², what is the volumetric flow rate?
A.0.0015 m³/s
B.0.0030 m³/s
C.0.0035 m³/s
D.0.0075 m³/s
Explanation: Flow rate Q equals area times velocity: Q = A × V = 0.0020 m² × 1.5 m/s = 0.0030 m³/s. This continuity relationship is fundamental in plumbing arithmetic for sizing supply and drain lines.
4Approximately how many meters of water column correspond to a static pressure of 200 kPa? (Use 9.81 kPa ≈ 1 m water column.)
A.about 20 m
B.about 10 m
C.about 30 m
D.about 2 m
Explanation: Static head in meters ≈ pressure in kPa ÷ 9.81. 200 ÷ 9.81 ≈ 20.4 m, so about 20 m of water column. Plumbing arithmetic routinely converts between pressure and elevation head for tanks, pumps, and fixtures.
5A horizontal building drain is laid at a uniform slope of 2%. How much vertical drop occurs over a 12 m developed length?
A.0.24 m
B.0.12 m
C.0.48 m
D.2.4 m
Explanation: A 2% slope means 0.02 m of fall per meter of run. Over 12 m: 12 × 0.02 = 0.24 m. The Revised National Plumbing Code requires horizontal drainage piping to run at not less than about 2% (20 mm/m) unless an approved shallower slope with reduced capacity applies.
6A private dwelling has fixtures totaling 24 drainage fixture units on a common horizontal drain. If the designer must use a 1% slope instead of 2%, and the code multiplies allowable horizontal fixture-unit capacity by 0.8 at 1% slope, what adjusted load should be used when checking table capacity?
A.24 fixture units with no adjustment
B.30 fixture units (use 24 ÷ 0.8)
C.48 fixture units (double the load)
D.19.2 fixture units (use 0.8 × 24)
Explanation: NPCP/UPC drainage-table notes reduce horizontal capacity at the flatter ~1% (10.4 mm/m) slope by multiplying horizontal fixture-unit values by 0.8. Equivalently, when checking against an unadjusted 2%-slope table, inflate the connected load: 24 ÷ 0.8 = 30 fixture units. Multiplying the load by 0.8 would incorrectly ease the check.
7A cylindrical elevated tank has an inside diameter of 2.0 m and a water depth of 3.0 m. Using π ≈ 3.14, what is the approximate stored volume?
A.9.42 m³
B.12.56 m³
C.18.84 m³
D.6.28 m³
Explanation: Volume of a cylinder is πr²h. With r = 1.0 m and h = 3.0 m: V ≈ 3.14 × 1² × 3 = 9.42 m³. Tank-volume arithmetic appears regularly in Plumbing Arithmetic for storage and demand checks.
8Convert 75 mm nominal pipe diameter to inches using 25.4 mm ≈ 1 inch. Which size is closest?
A.2 inches
B.4 inches
C.1-1/2 inches
D.3 inches
Explanation: 75 ÷ 25.4 ≈ 2.95, which is essentially 3 inches. Philippine plumbing work frequently switches between metric NPCP tables and inch-based trade sizes, so conversion accuracy matters.
9A copper water riser expands 1.2 mm for every 1 m of length when heated through a given temperature rise. What total expansion should be expected for a 15 m riser under the same temperature change?
A.8.0 mm
B.18.0 mm
C.12.0 mm
D.22.5 mm
Explanation: Expansion scales linearly with length: 1.2 mm/m × 15 m = 18.0 mm. Plumbing arithmetic for hot-water and solar lines uses thermal-expansion estimates to size expansion loops or compensators.
10A contractor prices 40 mm PVC drain pipe at PHP 185 per meter. How much should be budgeted for 28 m of that pipe before fittings and waste allowance?
A.PHP 4,180
B.PHP 5,880
C.PHP 5,180
D.PHP 7,400
Explanation: Material cost = unit price × length: 185 × 28 = 5,180. Plumbing Arithmetic includes straightforward takeoff multiplication used in estimating and bid checks.

About the MPLE Board Exam Practice Questions

Verified exam format metadata for PRC Master Plumber Licensure Examination is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.