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100+ Free PRC IDLE Practice Questions

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2026 Statistics

Key Facts: PRC IDLE Exam

7

Examination Subjects

Board of Interior Design

70%

Passing Weighted Average

RA 10350

1 Year

Project Guarantee Period

RA 10350

40%

Interior Design Weight

Board of Interior Design

RA 10350

Governing Republic Act

PRC

3 Days

Licensure Exam Duration

PRC

The PRC Interior Designer Licensure Examination is the Philippine board exam for interior designer registration under RA 10350. It spans three days and tests seven weighted subjects: Interior Design (40%), Furniture Design & Construction (15%), Materials (10%), History (10%), Construction & Utilities (10%), Professional Practice (10%), and Color Theory (5%). A candidate must achieve a 70% weighted general average to pass. Key areas of focus include space planning, furniture joinery, finishes, global/Filipino design history, PD 1096, BP 344, and RA 9514.

Sample PRC IDLE Practice Questions

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

1Under Batas Pambansa (BP) 344, the Accessibility Law of the Philippines, what is the minimum required clear width for accessible door openings?
A.700 mm
B.800 mm
C.900 mm
D.1000 mm
Explanation: Under BP 344 IRR, all doors shall have a minimum clear width of 900 mm, measured from the face of a fully open door at 90 degrees to the door jamb, to allow standard wheelchair passage.
2What is the maximum recommended total perimeter distance for a residential kitchen work triangle?
A.6.0 meters
B.7.0 meters
C.9.0 meters
D.12.0 meters
Explanation: To ensure efficiency in a residential kitchen layout, the sum of the three legs of the work triangle (connecting the sink, range, and refrigerator) should be between 4.0 meters (13 feet) and 9.0 meters (26 feet).
3According to BP 344, what is the required mounting height range for accessible grab bars in a toilet stall?
A.600 mm to 700 mm
B.700 mm to 800 mm
C.800 mm to 900 mm
D.900 mm to 1000 mm
Explanation: BP 344 IRR specifies that the top of the horizontal grab bar shall be installed 300 mm above the top of the toilet seat. With the accessible toilet seat at 450 mm, the grab bar top is at 750 mm above the finished floor, falling within the 700 mm to 800 mm range and providing optimal leverage for wheelchair users transferring to the toilet.
4What is the standard ergonomic desk height for a seated office workstation in professional space planning?
A.680 mm
B.750 mm
C.820 mm
D.900 mm
Explanation: The standard ergonomic desk height for a seated office worker ranges between 740 mm and 760 mm (nominally 750 mm). This height accommodates the anthropometric average of users when paired with an adjustable chair.
5Under Chapter 8 of the National Building Code of the Philippines (PD 1096), what is the minimum ceiling height for a habitable room on the ground floor with natural ventilation?
A.2.10 meters
B.2.40 meters
C.2.70 meters
D.3.00 meters
Explanation: Under PD 1096, habitable rooms with natural ventilation must have a minimum ceiling height of 2.70 meters (9 feet) on the ground floor. For multi-storey buildings, subsequent storeys may have a minimum ceiling height of 2.40 meters.
6In dining room space planning, what is the minimum clearance required behind a dining table to allow a seated person to push back their chair and permit easy passage behind them?
A.600 mm
B.750 mm
C.900 mm
D.1200 mm
Explanation: A clearance of 1200 mm (4 feet) behind a dining table allows a seated diner to push back their chair comfortably while leaving enough space for another person to walk behind them.
7What type of retail store layout organizes merchandise fixtures in a grid-like structure, maximizing shelf space but offering low visual exploration?
A.Free-flow layout
B.Racetrack (Loop) layout
C.Grid layout
D.Spine layout
Explanation: A grid layout organizes fixtures and aisles in a structured, parallel pattern (common in supermarkets). It maximizes shelf capacity and simplifies navigation, though it is visually repetitive.
8In contemporary office planning, which concept uses unassigned desks that employees reserve for the day to optimize office square footage?
A.Activity-based working
B.Hot-desking (Hoteling)
C.Open-plan bullpen
D.Co-working zones
Explanation: Hot-desking (or hoteling) involves employees using any available unassigned desk rather than having a fixed personal desk, which reduces real estate costs for hybrid workforces.
9In hospitality and bar design, what is the standard height range for a bar counter?
A.850 mm to 900 mm
B.900 mm to 950 mm
C.1000 mm to 1050 mm
D.1050 mm to 1100 mm
Explanation: A standard bar counter is designed to be comfortable for standing patrons or users seated on high bar stools, requiring a height of 1050 mm to 1100 mm (42 to 43 inches).
10What is the recommended average illuminance level (in Lux) for general office tasks, such as reading and typing at a computer workstation, under Philippine standards?
A.150 Lux
B.300 to 500 Lux
C.750 Lux
D.1000 Lux
Explanation: General office work, including computer usage, data entry, and reading printed documents, requires an average illuminance level of 300 to 500 Lux to ensure comfort and reduce eye strain.

About the PRC IDLE Exam

The PRC Interior Designer Licensure Examination (IDLE) is the national board examination required to become a registered and licensed interior designer in the Philippines under Republic Act No. 10350, the Philippine Interior Design Act of 2012. Administered by the Professional Regulatory Board of Interior Design under the Professional Regulation Commission (PRC), the examination is conducted over three days and consists of seven subjects: (1) Interior Design (40%), (2) Furniture Design and Construction (15%), (3) Materials of Design and Decoration (10%), (4) History of Arts and Interior Design (10%), (5) Interior Construction and Utilities (10%), (6) Professional Practice and Ethics (10%), and (7) Color Theory (5%). A candidate must obtain a weighted general average of seventy percent (70%) to qualify as having passed. The exam covers space planning, furniture detailing, finishes, design history, building codes (PD 1096, RA 9514, BP 344), and professional ethics.

Assessment

Question count not published by the exam provider

Time Limit

Three-day written and practical examination

Passing Score

70% weighted general average (GWA)

Exam Fee

Approximately PHP 1,300 examination fee plus PRC processing fees (Professional Regulatory Board of Interior Design under the PRC)

PRC IDLE Exam Content Outline

40%

Interior Design

Space planning, space programming, tropical design (ventilation, solar loading), ergonomics, residential and commercial layouts, and clearances.

15%

Furniture Design and Construction

History and styles of furniture, furniture construction detailing, joinery (dovetail, mortise and tenon, etc.), upholstery materials, and detailing.

10%

Materials of Design and Decoration

Wall, floor, and ceiling treatments, textiles and upholstery fabrics, glass types, metals, paints, stone, tile, and acoustics.

10%

History of Arts and Interior Design

Western art and design styles, Eastern/Asian design traditions, Philippine architectural and art history (Bahay Kubo, Bahay na Bato), and National Artists.

10%

Interior Construction and Utilities

Partition and ceiling construction, electrical layout and lighting design, plumbing fixtures and trap utilities, HVAC, and fire protection.

10%

Professional Practice and Ethics

RA 10350 (Philippine Interior Design Act of 2012), Code of Ethics, business contracts, specifications, and building codes (PD 1096, BP 344, RA 9514).

5%

Color Theory

Hue, value, chroma, color systems (Munsell, Ostwald), color schemes (analogous, triadic, etc.), color psychology, and lighting interaction.

How to Pass the PRC IDLE Exam

What You Need to Know

  • Passing score: 70% weighted general average (GWA)
  • Assessment: Question count not published by the exam provider
  • Time limit: Three-day written and practical examination
  • Exam fee: Approximately PHP 1,300 examination fee plus PRC processing fees

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

PRC IDLE Study Tips from Top Performers

1Dedicate the largest block of your study time to Interior Design (40% of the exam), practicing quick space planning and programming.
2Understand the key requirements of RA 10350, including civil liability and the one-year project guarantee.
3Memorize the crucial dimensions of BP 344 (Accessibility Law): 0.80 m door clear opening, 1.20 m corridor width, 1.50 m wheelchair turning circle, and 1:12 ramp slope.
4Study traditional wood joints (such as dovetail and mortise-and-tenon) and know their appropriate structural and aesthetic applications.
5Familiarize yourself with native Philippine woods used in furniture making, such as Narra, Kamagong, and Tanguile.
6Drill building codes: PD 1096 (National Building Code) ceiling heights (2.70 m for natural ventilation, 2.40 m for artificial ventilation) and RA 9514 (Fire Code) exit travel distances.
7Review the history of design, including major Western movements (Art Nouveau, Art Deco, Bauhaus) and key Philippine heritage styles.
8Master the dimensions of color (hue, value, chroma) and color models like the Munsell Color System.

Frequently Asked Questions

What is the passing grade for the PRC Interior Designer Licensure Examination?

Under Section 17 of Republic Act No. 10350 (Philippine Interior Design Act of 2012), a candidate must obtain a weighted general average of at least seventy percent (70%) to be qualified as having passed the Board Licensure Examination for Interior Designers.

What subjects are covered in the Interior Designer board exam?

The examination is held over three days and covers seven subjects: Interior Design (40%), Furniture Design and Construction (15%), Materials of Design and Decoration (10%), History of Arts and Interior Design (10%), Interior Construction and Utilities (10%), Professional Practice and Ethics (10%), and Color Theory (5%).

What law regulates the practice of interior design in the Philippines?

The practice of interior design in the Philippines is governed by Republic Act No. 10350, also known as the Philippine Interior Design Act of 2012, which repealed the previous law (RA 8534) and established the Professional Regulatory Board of Interior Design under the PRC.

What is the project guarantee required under RA 10350?

Under RA 10350, a licensed interior designer assumes full civil liability for their design work and must provide a one-year guarantee for their projects from the time of final turnover to the client. Any defects due to faulty design must be repaired at the designer's expense within 45 days of a formal complaint.