Exam Questions And Correct Answers

CA D80 T-Bar Systems 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 T-Bar ceiling

system?

• To support heavy loads above the ceiling
• To provide decorative finishes only
• To support ceiling tiles and provide a finished ceiling

appearance

• To act as a structural floor

Rationale: T-Bar systems are designed primarily to support ceiling

tiles and provide an aesthetic finished ceiling while allowing access to the plenum above.

• What is the standard spacing for main runners in a typical T-Bar ceiling

system?

• 12 inches
• 18 inches
• 24 inches
• 36 inches

Rationale: Standard T-Bar systems typically have main runners

spaced at 24 inches on center to ensure proper support for ceiling tiles.

• Which material is commonly used for T-Bar runners?
• Wood
• Steel

C. PVC

• Fiberglass 1 / 3

Rationale: T-Bar runners are most commonly made from steel for

strength, durability, and resistance to sagging.

• When installing a T-Bar ceiling, which safety precaution is critical?
• Wearing rubber boots
• Using a stable ladder and proper personal protective equipment

(PPE)

• Using a level only
• Wearing gloves exclusively

Rationale: Proper ladder use and PPE are essential to prevent falls

and injuries during T-Bar installation.

• Which ceiling tile type is most suitable for high-humidity areas?
• Standard mineral fiber
• Gypsum board
• Vinyl-coated or fiberglass tiles
• Wood veneer

Rationale: Vinyl-coated and fiberglass ceiling tiles resist moisture

absorption, making them suitable for high-humidity areas.

• How should ceiling height be measured before T-Bar installation?
• From floor to ceiling joists
• From floor to decorative molding
• From finished floor to the bottom of the T-Bar system
• From floor to HVAC ducts

Rationale: Accurate ceiling height is measured from the finished

floor to the bottom of the installed T-Bar to ensure proper alignment and fit of tiles.

• What is the purpose of cross tees in a T-Bar system?
• To support lighting fixtures only
• To connect main runners and form the grid for ceiling tiles
• To anchor the ceiling to walls
• To carry electrical wiring

Rationale: Cross tees intersect with main runners to form a stable

grid that supports ceiling tiles.

• What is the correct method to cut a T-Bar runner to fit a ceiling layout?
• Using a hand saw without measuring
• Measuring accurately and cutting with a hacksaw or aviation

snips

• Bending it into place 2 / 3

• Using a hammer to force fit

Rationale: Accurate measurement and proper cutting tools ensure a

precise fit and maintain the integrity of the grid.

• What is the maximum recommended distance between wall angles in a

standard T-Bar installation?

• 12 inches
• 18 inches
• 24 inches
• 36 inches

Rationale: Wall angles should be installed at intervals matching the

main runner spacing, typically 24 inches, to support the ceiling grid.

• Which type of suspension wire is standard for supporting T-Bar

systems?

• Rope
• Nylon cord
• 12-gauge galvanized steel wire
• Aluminum tape

Rationale: 12-gauge galvanized steel wire provides sufficient strength

and corrosion resistance for T-Bar suspension.

• When installing a T-Bar ceiling in a seismic zone, what

additional feature may be required?

• Extra ceiling tiles
• Thicker tiles
• Seismic bracing and clips
• Extra lighting fixtures

Rationale: Seismic zones require additional bracing and clips to

prevent grid movement during an earthquake.

• What is the purpose of a shadow line in a T-Bar ceiling system?
• To hide wiring
• To create a recessed aesthetic effect
• To reinforce the main runners
• To reduce noise

Rationale: Shadow lines provide a decorative visual effect by

recessing the edge of ceiling tiles.

• Which tool is essential for leveling a T-Bar ceiling grid?
• Tape measure only
• Hammer
• / 3