NYCHA Supervisor Painter Written practice
Exam Questions And Correct Answers (Verified
Answers) Plus Explanation 2026 Q&A | Instant
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1. What is the primary purpose of a primer before painting a surface?
A) To act as the final decorative coat
B) To remove mold and lead entirely
C) To improve paint adhesion and seal the surface
D) To increase drying time of the paint
Answer: C
Explanation: Primers seal porous surfaces and provide a bonding layer, ensuring the
topcoat adheres properly and lasts longer. Without primer, paint may peel or blister .
2. Which type of paint is best suited for interior walls in NYCHA residential apartments?
A) Water-based latex paint
B) Oil-based enamel paint only
C) Exterior masonry paint
D) Industrial epoxy paint
Answer: A
Explanation: Water-based latex paints dry quickly, emit low VOCs (fewer fumes), are easy
to clean with soap and water, and provide good durability for residential interiors .
3. Which paint finish is easiest to clean and most durable for high-traffic areas like
hallways?
A) Flat
B) Matte
C) Semi-gloss or satin
D) Eggshell
,Answer: C
Explanation: Semi-gloss and satin finishes have higher sheen and are more resistant to
scuffing, moisture, and stains. They can be wiped clean repeatedly without damaging the
surface .
4. What type of paint is ideal for high-moisture areas like bathrooms and kitchens?
A) Moisture-resistant semi-gloss latex paint
B) Flat interior latex paint
C) Exterior oil-based paint only
D) Industrial enamel paint
Answer: A
Explanation: Semi-gloss latex paint resists water, mold, and mildew growth. Its hard, non-
porous surface prevents moisture absorption, which is critical in humid environments .
5. Which paint is formulated to withstand sun, rain, and temperature fluctuations?
A) Exterior-grade acrylic latex paint
B) Interior flat paint
C) Primer only
D) Industrial epoxy
Answer: A
Explanation: Exterior paints contain UV blockers and flexible binders that expand and
contract with temperature changes. They resist fading, cracking, and peeling caused by
weather exposure .
6. Which paint type provides the most durable, washable finish for trim and doors in
public housing?
A) Water-based latex
B) Oil-based or water-based enamel
C) Chalk paint
D) Dryfall paint
Answer: B
Explanation: Enamel paints (either oil-based or high-quality water-based) cure to a hard,
smooth finish that resists impacts, abrasion, and frequent cleaning—essential for high-
touch surfaces like doors and baseboards.
7. What is the primary difference between water-based and oil-based paints?
A) Water-based uses water as solvent (low odor, fast drying); oil-based uses
mineral spirits (strong odor, slow drying)
B) Oil-based dries faster than water-based
,C) Water-based cannot be used on wood
D) Oil-based is always more expensive
Answer: A
*Explanation: Water-based (latex) paints clean up with water, dry in 1-2 hours, and have
lower VOCs. Oil-based (alkyd) paints require solvents for cleanup, take 6-8 hours to dry,
and emit strong fumes but provide exceptional hardness and flow .*
8. When should a supervisor specify a "sealer" instead of a standard primer?
A) When covering porous surfaces like new drywall or stained areas
B) For final decorative coat
C) To remove rust
D) To increase gloss
Answer: A
Explanation: Sealers are specialized primers that block stains (water, smoke, tannin from
wood), seal porous substrates, and prevent uneven absorption that would cause "flashing"
or patchy sheen .
9. Which additive can be mixed with paint to improve adhesion on glossy surfaces?
A) Bonding agent or deglosser
B) Water
C) More pigment
D) Thinner
Answer: A
Explanation: Bonding agents (liquid additives) or chemical deglossers etch the surface
chemically, allowing paint to grip without extensive sanding. This is common when
repainting over oil-based or high-gloss existing coatings.
10. What type of coating is required for painting over rusted metal surfaces?
A) Rust-inhibitive primer
B) Standard latex primer
C) Drywall sealer
D) Varnish
Answer: A
Explanation: Rust-inhibitive primers contain special pigments (e.g., zinc chromate or red
lead substitutes) that chemically stop corrosion and prevent further rust formation.
Standard primers will not adhere to rusted metal .
, Domain 2: Surface Preparation (Questions 11–30)
11. Why is surface sanding necessary before painting?
A) To smooth imperfections and promote paint adhesion
B) To remove paint completely
C) To dry the surface
D) To add texture
Answer: A
Explanation: Sanding removes glossy coatings, rough spots, and loose particles, creating a
"tooth" that mechanical bonds the new paint to the surface. Skipping sanding leads to
peeling and poor coverage .
12. Why is surface moisture testing important before painting?
A) Wet surfaces prevent paint adhesion and cause blistering or peeling
B) Only needed for oil-based paints
C) Only for exterior surfaces
D) To speed up drying time
Answer: A
Explanation: Painting over damp surfaces traps moisture, leading to blistering, bubbling,
and eventual paint failure. Moisture meters or simple plastic sheet tests (taped to surface
for 24 hours) can detect hidden moisture .
13. What is the best method to remove mold from a wall before painting?
A) Clean with appropriate fungicide/mildewcide and allow surface to dry
completely
B) Paint over mold immediately
C) Use water only
D) Scrape off without protection
Answer: A
Explanation: Mold must be killed with a biocide or diluted bleach solution (1:3 ratio), then
the surface must be completely dried. Painting over live mold will not stop it—it will grow
through the new paint and cause health hazards .
14. What is the safest way to remove old paint containing lead in NYCHA housing?
A) Use lead-safe work practices including HEPA vacuuming, wet sanding, and PPE
B) Sand or scrape dry without protection
Exam Questions And Correct Answers (Verified
Answers) Plus Explanation 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a primer before painting a surface?
A) To act as the final decorative coat
B) To remove mold and lead entirely
C) To improve paint adhesion and seal the surface
D) To increase drying time of the paint
Answer: C
Explanation: Primers seal porous surfaces and provide a bonding layer, ensuring the
topcoat adheres properly and lasts longer. Without primer, paint may peel or blister .
2. Which type of paint is best suited for interior walls in NYCHA residential apartments?
A) Water-based latex paint
B) Oil-based enamel paint only
C) Exterior masonry paint
D) Industrial epoxy paint
Answer: A
Explanation: Water-based latex paints dry quickly, emit low VOCs (fewer fumes), are easy
to clean with soap and water, and provide good durability for residential interiors .
3. Which paint finish is easiest to clean and most durable for high-traffic areas like
hallways?
A) Flat
B) Matte
C) Semi-gloss or satin
D) Eggshell
,Answer: C
Explanation: Semi-gloss and satin finishes have higher sheen and are more resistant to
scuffing, moisture, and stains. They can be wiped clean repeatedly without damaging the
surface .
4. What type of paint is ideal for high-moisture areas like bathrooms and kitchens?
A) Moisture-resistant semi-gloss latex paint
B) Flat interior latex paint
C) Exterior oil-based paint only
D) Industrial enamel paint
Answer: A
Explanation: Semi-gloss latex paint resists water, mold, and mildew growth. Its hard, non-
porous surface prevents moisture absorption, which is critical in humid environments .
5. Which paint is formulated to withstand sun, rain, and temperature fluctuations?
A) Exterior-grade acrylic latex paint
B) Interior flat paint
C) Primer only
D) Industrial epoxy
Answer: A
Explanation: Exterior paints contain UV blockers and flexible binders that expand and
contract with temperature changes. They resist fading, cracking, and peeling caused by
weather exposure .
6. Which paint type provides the most durable, washable finish for trim and doors in
public housing?
A) Water-based latex
B) Oil-based or water-based enamel
C) Chalk paint
D) Dryfall paint
Answer: B
Explanation: Enamel paints (either oil-based or high-quality water-based) cure to a hard,
smooth finish that resists impacts, abrasion, and frequent cleaning—essential for high-
touch surfaces like doors and baseboards.
7. What is the primary difference between water-based and oil-based paints?
A) Water-based uses water as solvent (low odor, fast drying); oil-based uses
mineral spirits (strong odor, slow drying)
B) Oil-based dries faster than water-based
,C) Water-based cannot be used on wood
D) Oil-based is always more expensive
Answer: A
*Explanation: Water-based (latex) paints clean up with water, dry in 1-2 hours, and have
lower VOCs. Oil-based (alkyd) paints require solvents for cleanup, take 6-8 hours to dry,
and emit strong fumes but provide exceptional hardness and flow .*
8. When should a supervisor specify a "sealer" instead of a standard primer?
A) When covering porous surfaces like new drywall or stained areas
B) For final decorative coat
C) To remove rust
D) To increase gloss
Answer: A
Explanation: Sealers are specialized primers that block stains (water, smoke, tannin from
wood), seal porous substrates, and prevent uneven absorption that would cause "flashing"
or patchy sheen .
9. Which additive can be mixed with paint to improve adhesion on glossy surfaces?
A) Bonding agent or deglosser
B) Water
C) More pigment
D) Thinner
Answer: A
Explanation: Bonding agents (liquid additives) or chemical deglossers etch the surface
chemically, allowing paint to grip without extensive sanding. This is common when
repainting over oil-based or high-gloss existing coatings.
10. What type of coating is required for painting over rusted metal surfaces?
A) Rust-inhibitive primer
B) Standard latex primer
C) Drywall sealer
D) Varnish
Answer: A
Explanation: Rust-inhibitive primers contain special pigments (e.g., zinc chromate or red
lead substitutes) that chemically stop corrosion and prevent further rust formation.
Standard primers will not adhere to rusted metal .
, Domain 2: Surface Preparation (Questions 11–30)
11. Why is surface sanding necessary before painting?
A) To smooth imperfections and promote paint adhesion
B) To remove paint completely
C) To dry the surface
D) To add texture
Answer: A
Explanation: Sanding removes glossy coatings, rough spots, and loose particles, creating a
"tooth" that mechanical bonds the new paint to the surface. Skipping sanding leads to
peeling and poor coverage .
12. Why is surface moisture testing important before painting?
A) Wet surfaces prevent paint adhesion and cause blistering or peeling
B) Only needed for oil-based paints
C) Only for exterior surfaces
D) To speed up drying time
Answer: A
Explanation: Painting over damp surfaces traps moisture, leading to blistering, bubbling,
and eventual paint failure. Moisture meters or simple plastic sheet tests (taped to surface
for 24 hours) can detect hidden moisture .
13. What is the best method to remove mold from a wall before painting?
A) Clean with appropriate fungicide/mildewcide and allow surface to dry
completely
B) Paint over mold immediately
C) Use water only
D) Scrape off without protection
Answer: A
Explanation: Mold must be killed with a biocide or diluted bleach solution (1:3 ratio), then
the surface must be completely dried. Painting over live mold will not stop it—it will grow
through the new paint and cause health hazards .
14. What is the safest way to remove old paint containing lead in NYCHA housing?
A) Use lead-safe work practices including HEPA vacuuming, wet sanding, and PPE
B) Sand or scrape dry without protection
