Construction Roof

What is the name of the horizontal beam that supports the rafters in the roof structure?

• Purlin

• Column

• Knee brace

• Ceiling

Answer explanation

The name of the horizontal beam that supports the rafters in the roof structure is called a Purlin.

Which type of roof is shown in the image?

• Flat roof

• Dome roof

• Pitched roof

• Curved roof

Answer explanation

The type of roof shown in the image is a flat roof, as it appears to have a horizontal surface without any significant slope or pitch.

Which type of pitched roof is characterized by having four slopes?

• Hip roof

• Gable roof

• Lean-to

• Double pitch

Answer explanation

A hip roof is characterized by having four slopes, making it the correct choice in this case.

What is the purpose of overhanging eaves and guttering on a roof?

• To support the roof's weight

• To discharge rainfall away from the building

• To provide extra accommodation

• To make the structure waterproof

Answer explanation

The purpose of overhanging eaves and guttering on a roof is to discharge rainfall away from the building.

What is the function of the soffit in roof construction?

• To provide ventilation to the attic

• To support the roof structure

• To collect rainwater

• To act as a vapour barrier

Answer explanation

The function of the soffit in roof construction is to provide ventilation to the attic, allowing air to flow and prevent moisture buildup.

What is the primary function of a ridge board in roof construction?

• To support the roof's weight

• To provide a nailing surface for the rafters

• To collect rainwater

• To act as a vapour barrier

Answer explanation

The primary function of a ridge board in roof construction is to provide a nailing surface for the rafters.

What is the purpose of a roof truss?

• To provide ventilation to the attic

• To support the roof structure

• To collect rainwater

• To act as a vapour barrier

Answer explanation

The purpose of a roof truss is to support the roof structure, providing stability and strength to the overall roofing system.

What is the primary purpose of roof insulation?

• To support the roof structure

• To provide a nailing surface for the rafters

• To reduce heat loss

• To collect rainwater

Answer explanation

The primary purpose of roof insulation is to reduce heat loss.

Which type of roof is typically used for industrial buildings?

• Flat roof

• Gable roof

• Hip roof

• Mansard roof

Answer explanation

Industrial buildings typically use flat roofs due to their cost-effectiveness, ease of installation, and suitability for housing HVAC equipment and other industrial machinery.

What is the function of a roof valley?

• To provide ventilation to the attic

• To support the roof structure

• To collect and channel rainwater

• To act as a vapour barrier

Answer explanation

The function of a roof valley is to collect and channel rainwater, helping to prevent water damage and directing water away from the roof structure.