Contractor Exam Questions And

Ca C33 Painting And Decorating Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• Which of the following is the primary purpose of a primer in painting?
• To provide color
• To prevent rust
• To improve adhesion of the topcoat
• To act as a filler

Rationale: Primers are used to create a uniform surface that improves

adhesion for the subsequent paint layers, ensuring durability.

• What is the typical moisture content of wood before painting?

A. 0–5%

B. 5–10%

C. 10–15%

D. 15–20%

Rationale: Wood should be properly dried, usually to 10–15% moisture

content, to prevent paint blistering and peeling.

• Which of the following tools is used to smooth surfaces before

painting?

• Brush
• Roller 1 / 3

• Sandpaper
• Spray gun

Rationale: Sandpaper smooths surfaces, removes old paint, and ensures

better adhesion of new coatings.

• When applying oil-based paint, which solvent is commonly used for

thinning?

• Water
• Turpentine
• Alcohol
• Acetone

Rationale: Turpentine or mineral spirits are used to thin oil-based paints

and clean brushes.

• Latex paint is best known for which property?
• Oil resistance
• Water-based and quick drying
• Heavy odor
• Requires turpentine

Rationale: Latex paints are water-based, have low odor, and dry faster than

oil-based paints.

• What is the main purpose of a sealer in painting?
• Add gloss
• Prevent staining and uniform absorption
• Provide color
• Remove old paint

Rationale: Sealers prevent stains from bleeding through paint and create a

uniform surface for topcoats.

• Which type of paint is recommended for exterior surfaces exposed to

harsh weather?

• Interior latex
• Acrylic exterior paint 2 / 3

• Oil-based interior paint
• Enamel interior paint

Rationale: Acrylic exterior paints are flexible, durable, and resist fading

and cracking under outdoor conditions.

• What is the purpose of caulking before painting?
• Enhance color
• Seal gaps to prevent moisture and air infiltration
• Provide gloss
• Reduce paint consumption

Rationale: Caulking seals joints and cracks, preventing moisture damage

and improving finished appearance.

• Which pigment property determines lightfastness in paint?
• Gloss
• Resistance to fading under light exposure
• Viscosity
• Drying time

Rationale: Lightfast pigments maintain color stability and resist fading

when exposed to sunlight.

• Which of the following is considered a health hazard in painting?
• Latex paint
• Lead-based paint
• Acrylic paint
• Water-based primer

Rationale: Lead-based paints are toxic and can cause serious health issues;

proper precautions are required during removal.

• What is the typical coverage of a gallon of paint on smooth

surfaces?

• 50–75 sq ft
• 75–100 sq ft
• 350–400 sq ft
• 500–600 sq ft
• / 3