BMC_Unit-3

What is the primary function of a lintel in building construction?

• To support the roof structure
• To provide ventilation
• To support the wall above openings
• To enhance aesthetic appeal

Answer explanation

A lintel is a horizontal structural member placed over openings like doors and windows to support the weight of the wall above.

Which type of arch has a semicircular shape?

• Segmental arch
• Pointed arch
• Flat arch
• Roman arch

Answer explanation

A Roman arch is characterized by its semicircular shape, commonly used in ancient Roman architecture.

In building construction, what is the primary purpose of a damp proof course (DPC)?

• To prevent heat loss
• To prevent moisture rise
• To provide structural stability
• To enhance aesthetics

Answer explanation

A damp proof course is a barrier, usually a layer of waterproof material, installed to prevent moisture from rising through walls and floors.

Which type of staircase consists of steps that wind around a central pole?

• Straight staircase
• Spiral staircase
• Dog-legged staircase
• Bifurcated staircase

Answer explanation

A spiral staircase features steps that wind around a central pole, saving space and providing an aesthetic appeal.

What is the main advantage of a trussed roof?

• Simplicity in design
• Cost-effectiveness
• Ability to span large distances
• Ease of construction

Answer explanation

Trussed roofs are designed to span large distances without internal supports, making them ideal for large open spaces.

Which type of foundation is typically used in areas with weak soil to distribute the building load over a larger area?

• Strip foundation
• Raft foundation
• Pile foundation
• Pad foundation

Answer explanation

Raft foundations, also known as mat foundations, spread the load of the building over a large area, suitable for weak or expansive soils.

In plumbing services, what is the primary purpose of a trap in a drainage system?

• To increase water pressure
• To prevent sewer gases from entering
• To filter solid waste
• To regulate water temperature

Answer explanation

Traps are designed to hold a small amount of water, creating a seal that prevents sewer gases from entering buildings through the drainage system.

Which ventilation system relies on natural forces like wind and temperature differences to circulate air?

• Mechanical ventilation
• Forced ventilation
• Natural ventilation
• Hybrid ventilation

Answer explanation

Natural ventilation utilizes natural forces such as wind and thermal buoyancy to circulate fresh air without mechanical assistance.

In air-conditioning systems, what does the term 'HVAC' stand for?

• High Voltage Alternating Current
• Heating, Ventilation, and Air Conditioning
• High Velocity Air Circulation
• Humidity Ventilation and Air Control

Answer explanation

HVAC stands for Heating, Ventilation, and Air Conditioning, encompassing the systems that regulate indoor environmental comfort.

Which material is commonly used for fire-resistant construction due to its non-combustible properties?

• Wood
• Steel
• Asbestos
• Plastic

Answer explanation

Asbestos has historically been used for its fire-resistant and insulating properties, though its use has declined due to health concerns.