CA D50 SUSPENDED CEILINGS

CA D50 SUSPENDED CEILINGS

CONTRACTOR EXAM Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the primary function of a suspended (drop) ceiling?
• Increase building height
• Conceal mechanical, electrical, and plumbing systems
• Support roof loads
• Provide fireproofing

Rationale: Suspended ceilings mainly hide utilities while allowing access

above the grid.

• The standard main runner spacing for most acoustical ceiling grid

systems is:

• 2 feet
• 4 feet
• 6 feet
• 8 feet

Rationale: Manufacturers design grid layouts around 4-foot main runner

intervals.

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• The most commonly used ceiling tile size in commercial installations

is:

A. 1' × 3'

B. 2' × 3'

C. 2' × 2'

D. 4' × 4'

Rationale: 2'×2' is the industry standard for acoustical panels.

• When installing a suspended ceiling, the minimum required clearance

below structural elements is usually:

• 1 inch
• 2 inches
• 4 inches
• 6 inches

Rationale: A 6-inch clearance allows room for tile placement and utility

access.

5. Ceiling hanger wires must typically be spaced at a maximum of:

• 2 feet
• 3 feet
• 4 feet
• 5 feet

Rationale: 4-foot spacing is the standard to ensure support and load

distribution.

• Which type of laser is most commonly used to level suspended ceiling

grid?

• Line laser
• Rotary laser 2 / 3

• Dot laser
• Beam laser

Rationale: Rotary lasers provide a 360° horizontal reference ideal for

ceiling installations.

• Which tool is essential for cutting acoustical ceiling tiles?
• Circular saw
• Reciprocating saw
• Utility knife
• Band saw

Rationale: Utility knives provide clean and precise cuts for soft acoustical

tiles.

• Which code governs fire-rated suspended ceiling assemblies?

A. OSHA 1926

B. NEC

• UL listings

D. ANSI 101

Rationale: Fire-rated assemblies must comply with UL (Underwriters

Laboratories) tested systems.

• What type of wire is standard for ceiling suspension systems?
• Copper wire
• Aluminum wire
• 12-gauge galvanized steel wire
• Plastic-coated wire

Rationale: 12-gauge galvanized wire provides required strength and

corrosion resistance.

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