100+ Free Plumbing NC II Practice Questions

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Key Facts: Plumbing NC II Exam

₱1,888

Assessment Fee

TESDA Circular 072-2021

Medium-rise

Typical Scope

Plumbing NC II TR

Competency

Passing Standard

TESDA

5 years

NC Validity

TESDA

TESDA Plumbing NC II certifies installers for multiple plumbing units in medium-rise buildings, including leak testing and repair. Fee ₱1,425 (Jan 2021).

Sample Plumbing NC II Practice Questions

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

1In TESDA Plumbing NC II unit CON712348, what is the primary purpose of preparing estimation of materials for multiple plumbing units?

A.To quantify and list all materials, tools, and equipment needed for installing multiple plumbing units in a medium-rise building

B.To install hot- and cold-water piping on site without referring to plans

C.To conduct hydrostatic pressure tests on completed water lines

D.To replace defective fixtures after occupancy

Explanation: CON712348 covers estimating required materials for multiple plumbing units, including reading plans, interpreting legends, and preparing bills of materials for client presentation.

2On a plumbing plan, the abbreviation "CWL" typically stands for:

A.Cold Water Line

B.Coupling With Locknut

C.Concrete Wall Lining

D.Central Waste Lateral

Explanation: Per the TESDA Plumbing NC II Range of Variables, CWL is the abbreviation for Cold Water Line used on plumbing drawings and legends.

3A plumber estimates 12 identical lavatory rough-ins on one floor, each requiring 3 meters of 15 mm cold-water branch piping. How many meters of 15 mm pipe should be listed before fittings allowance?

A.36 meters

B.15 meters

C.12 meters

D.48 meters

Explanation: 12 units × 3 m each = 36 m of branch piping. Fittings allowance would be added separately per job requirements and estimation practice.

4When preparing a bill of materials for multiple water closets on several floors, which document should be consulted first to determine fixture specifications and rough-in dimensions?

A.Approved plumbing working plans and manufacturer fixture data

B.Only the electrical riser diagram

C.The painting schedule

D.The landscaping plan

Explanation: Estimation requires determining measurements and specifications from approved plans and details, then matching fixture models to job requirements.

5A medium-rise building has 8 floors with 4 hose bibbs (HB) per floor. How many hose bibbs must appear on the fixture schedule and material estimate?

A.32

B.12

C.8

D.4

Explanation: 8 floors × 4 hose bibbs per floor = 32 hose bibbs total for the multiple-unit takeoff.

6Which plan type is included in the Range of Variables for Plumbing NC II material estimation?

A.Plumbing plan, structural plan, architectural plan, and mechanical plan

B.Only the furniture layout plan

C.Traffic management plan only

D.Farm irrigation layout

Explanation: TESDA TR lists plumbing, structural, architectural, site development, mechanical, and electrical plans as sources for estimation.

7A takeoff shows 45 m of 50 mm cold-water riser (CWR) plus 10% waste allowance for cuts and misalignment. What length should be ordered?

A.49.5 meters

B.45 meters

C.50 meters

D.40.5 meters

Explanation: 45 m × 1.10 = 49.5 m. Estimators commonly add waste allowance before listing purchase quantities.

8The symbol "FD" on a plumbing drawing most commonly represents:

A.Floor drain (flat type)

B.Fire door

C.Foundation detail

D.Flow detector

Explanation: In TESDA plumbing legends, FD denotes a floor drain of the flat type used in sanitary drainage layouts.

9When summarizing estimation results for client submission per CON712348, what must the plumber present?

A.Bill of materials and cost estimates based on quantified materials, tools, and equipment

B.Only verbal confirmation without written quantities

C.A leak-test report from the drainage system

D.A welding procedure specification

Explanation: The competency requires quantifying and listing materials, then presenting bill of materials and cost estimates to the client.

10A 6-floor medium-rise needs 2 kitchen sinks per floor. Each sink requires one P-trap, two angle stops, and 4 m of 20 mm supply tubing. How many P-traps should be estimated?

A.12

B.6

C.2

D.24

Explanation: 6 floors × 2 sinks per floor = 12 sinks, therefore 12 P-traps (one per sink).

About the Plumbing NC II Exam

National plumbing competency practice covering estimation, multi-unit installation, leak testing, and maintenance knowledge.

Assessment

Performance-based assessment

Time Limit

4 to 8 hours

Passing Score

Competency-based

Exam Fee

₱1,888.00 (TESDA)

Plumbing NC II Exam Content Outline

20%

Materials Estimation

Prepare estimation of materials for multiple plumbing units

35%

Multiple Unit Installation

Perform multiple plumbing units installation and assemblies

25%

Leak Testing

Conduct pipe leak testing

20%

Repair & Maintenance

Perform plumbing repair and maintenance works

How to Pass the Plumbing NC II Exam

What You Need to Know

Passing score: Competency-based
Assessment: Performance-based assessment
Time limit: 4 to 8 hours
Exam fee: ₱1,888.00

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

Plumbing NC II Study Tips from Top Performers

1Practice material take-offs for multi-point hot/cold water systems.

2Know hydrostatic and other leak-test concepts and safety.

3Review drainage, venting, and water supply system roles.

4Study common fixture rough-in clearances conceptually.

5Prepare oral answers on troubleshooting no-hot-water and leak complaints.

Frequently Asked Questions

What does Plumbing NC II cover?

Installing multiple plumbing units with multi-point hot- and cold-water lines for medium-rise buildings, plus repair and maintenance (TR amended Oct 2014).

Fee?

Promulgated TESDA assessment fee ₱1,888.00 for Plumbing NC II Full (TESDA Circular No. 072-2021, 6 Sep 2021).

Assessment methods?

Written test/questioning relevant to underpinning knowledge, direct observation, demonstration with oral questioning, and written examination.

Passing standard?

Competent / Not Yet Competent.

Practice vs NC?

Practice questions cover written knowledge only; full NC requires practical assessment.

100+ Free Plumbing NC II Practice Questions

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