BMC_Unit-4

Which type of mortar is commonly used for high-strength masonry works?

• Cement mortar
• Lime mortar
• Gypsum mortar
• Mud mortar

Answer explanation

Cement mortar provides high strength and durability, making it suitable for load-bearing structures.

In brick masonry, which bond is characterized by alternate courses of headers and stretchers?

• English bond
• Flemish bond
• Header bond
• Stretcher bond

Answer explanation

The English bond alternates courses of headers and stretchers, providing strength and a distinct appearance.

What is the primary purpose of plastering in building construction?

• To improve aesthetics
• To enhance durability
• To provide thermal insulation
• To prevent cracks

Answer explanation

Plastering is primarily done to improve the surface finish and aesthetics of walls and ceilings.

Which type of masonry combines bricks and stones in construction?

• Brick masonry
• Stone masonry
• Composite masonry
• Reinforced brick masonry

Answer explanation

Composite masonry involves the use of both bricks and stones to take advantage of their respective strengths.

What is the main material used in the manufacture of ACP (Aluminum Composite Panels)?

• Aluminum
• Steel
• Concrete
• Timber

Answer explanation

ACPs are made by sandwiching a core material (like polyethylene) between two aluminum sheets, providing durability and aesthetic appeal.

Which type of pointing is most suitable for aesthetic enhancement of brick masonry?

• Flush pointing
• Recessed pointing
• Struck pointing
• Beaded pointing

Answer explanation

Beaded pointing is often chosen for aesthetic purposes as it provides a decorative finish to brick masonry.

What is the purpose of formwork in concrete construction?

• To provide temporary support
• To increase the strength of concrete
• To improve the aesthetics
• To prevent cracks

Answer explanation

Formwork is a temporary structure used to mold and support concrete until it gains sufficient strength to carry its load.

Which type of scaffolding is typically used in stone masonry construction?

• Single scaffolding
• Double scaffolding
• Suspended scaffolding
• Cantilever scaffolding

Answer explanation

Double scaffolding, also called mason’s scaffolding, is used in stone masonry to provide better stability.

What is the main difference between lime mortar and cement mortar?

• Lime mortar has better workability
• Cement mortar has higher strength
• Lime mortar is more durable
• Cement mortar is less expensive

Answer explanation

Cement mortar provides higher compressive strength compared to lime mortar, making it more suitable for modern construction.

In painting, what is the purpose of applying a primer coat?

• To protect the surface
• To improve adhesion of paint
• To enhance the color
• To prevent peeling

Answer explanation

Primer is applied to prepare the surface and improve the adhesion of subsequent layers of paint.