Introduction to Substrate & Subfloor
Inspection (ISSI)
Final Test Review (Qns & Ans)
2025
1. What is the primary function of a subfloor in a flooring
system?
- A. To provide aesthetic appeal
- B. To support the finished floor covering
- C. To insulate the building
- D. To reduce noise
- Correct ANS: B
2. Which of the following materials is commonly used for
subfloors in residential buildings?
©2024/2025
, - A. Marble
- B. Plywood
- C. Ceramic tiles
- D. Carpet
- Correct ANS: B
3. What is the main purpose of a moisture barrier in subfloor
installation?
- A. To enhance the appearance of the floor
- B. To prevent moisture from damaging the subfloor
- C. To provide additional insulation
- D. To reduce noise transmission
- Correct ANS: B
4. Which type of subfloor is most suitable for areas with high
moisture levels?
- A. Hardwood
- B. Concrete
- C. Laminate
- D. Vinyl
- Correct ANS: B
©2024/2025
,5. What is the recommended method for leveling an uneven
subfloor before installing finished floor coverings?
- A. Sanding
- B. Applying a self-leveling compound
- C. Using adhesive
- D. Installing a new subfloor
- Correct ANS: B
6. Which of the following is a common issue that can arise from
improper subfloor installation?
- A. Increased energy efficiency
- B. Floor squeaks and creaks
- C. Enhanced aesthetic appeal
- D. Improved indoor air quality
- Correct ANS: B
7. What is the primary consideration when selecting a subfloor
material for a commercial building?
- A. Color and design
- B. Durability and load-bearing capacity
©2024/2025
, - C. Cost and availability
- D. Ease of installation
- Correct ANS: B
8. Which type of adhesive is typically used for bonding subfloor
panels to joists?
- A. Epoxy
- B. Polyurethane
- C. Water-based adhesive
- D. Hot glue
- Correct ANS: B
9. What is the purpose of an underlayment in a flooring system?
- A. To provide a smooth surface for the finished floor
- B. To add color to the floor
- C. To increase the height of the floor
- D. To reduce the cost of installation
- Correct ANS: A
10. Which of the following is a critical factor in ensuring the
longevity of a finished floor covering?
©2024/2025
Inspection (ISSI)
Final Test Review (Qns & Ans)
2025
1. What is the primary function of a subfloor in a flooring
system?
- A. To provide aesthetic appeal
- B. To support the finished floor covering
- C. To insulate the building
- D. To reduce noise
- Correct ANS: B
2. Which of the following materials is commonly used for
subfloors in residential buildings?
©2024/2025
, - A. Marble
- B. Plywood
- C. Ceramic tiles
- D. Carpet
- Correct ANS: B
3. What is the main purpose of a moisture barrier in subfloor
installation?
- A. To enhance the appearance of the floor
- B. To prevent moisture from damaging the subfloor
- C. To provide additional insulation
- D. To reduce noise transmission
- Correct ANS: B
4. Which type of subfloor is most suitable for areas with high
moisture levels?
- A. Hardwood
- B. Concrete
- C. Laminate
- D. Vinyl
- Correct ANS: B
©2024/2025
,5. What is the recommended method for leveling an uneven
subfloor before installing finished floor coverings?
- A. Sanding
- B. Applying a self-leveling compound
- C. Using adhesive
- D. Installing a new subfloor
- Correct ANS: B
6. Which of the following is a common issue that can arise from
improper subfloor installation?
- A. Increased energy efficiency
- B. Floor squeaks and creaks
- C. Enhanced aesthetic appeal
- D. Improved indoor air quality
- Correct ANS: B
7. What is the primary consideration when selecting a subfloor
material for a commercial building?
- A. Color and design
- B. Durability and load-bearing capacity
©2024/2025
, - C. Cost and availability
- D. Ease of installation
- Correct ANS: B
8. Which type of adhesive is typically used for bonding subfloor
panels to joists?
- A. Epoxy
- B. Polyurethane
- C. Water-based adhesive
- D. Hot glue
- Correct ANS: B
9. What is the purpose of an underlayment in a flooring system?
- A. To provide a smooth surface for the finished floor
- B. To add color to the floor
- C. To increase the height of the floor
- D. To reduce the cost of installation
- Correct ANS: A
10. Which of the following is a critical factor in ensuring the
longevity of a finished floor covering?
©2024/2025
