Question 1

the keyway between precast- concrete hollow- core slabs is generally

Accepted Answer

The keyway between precast-concrete hollow-core slabs is generally reinforced with horizontal steel dowels (A) and grouted (B) to ensure structural integrity and load distribution.

Question 2

The commonly used floor system in high- rise and mid- rise masonry bearing wall buildings in North America is

Accepted Answer

Precast concrete hollow-core slabs are commonly used as floor systems in high-rise and mid-rise masonry bearing wall buildings in North America. These slabs are economical, quick and easy to install, and offer good fire resistance and sound insulation. Cast-in-place reinforced-concrete slabs and precast concrete double-tee units are also used in some situations, but they are not as commonly used as precast concrete hollow-core slabs. Therefore, the best choice is C.

Question 3

A cellular- type floor plan in a multistory building is generally inherent in the following occupancies:

Accepted Answer

Residential occupancies typically have a cellular-type floor plan, with individual units or rooms separated by walls, providing privacy and separation for residents.

Question 4

Masonry walls without joint reinforcement are called plain- masonry walls.

Accepted Answer

The answer of Masonry walls without joint reinforcement are called...

Question 5

In a cross- bearing wall structure, the load- bearing walls are

Accepted Answer

The answer of In a cross- bearing wall structure, the...

Question 6

A load- bearing wall structure works best when the floor plan of the building has

Accepted Answer

A load-bearing wall structure works best when the walls are continuous up from the foundations, distributed almost uniformly in both principal directions, and the walls at an upper floor align with the walls at a lower floor. These factors work together to evenly distribute the weight of the building and transfer it down to the foundations, providing stability and strength to the structure.

Question 7

A bond beam in a masonry bearing wall building must be

Accepted Answer

A bond beam is a reinforced concrete or reinforced masonry beam that is placed horizontally at the top of a masonry wall. Its purpose is to tie the masonry units together and distribute horizontal loads, such as wind or seismic forces, to the supporting walls or columns. Steel or wood beams are not typically used as bond beams because they do not provide the same level of durability and fire resistance as reinforced concrete or reinforced masonry.

Question 8

A bond beam in a masonry bearing wall building

Accepted Answer

A bond beam is a horizontal structural element embedded in masonry walls to provide additional strength and support.

Question 9

Historical load- bearing masonry structures were designed with the assumption that

Accepted Answer

The answer of Historical load- bearing masonry structures were designed...

Question 10

In high- rise residential buildings built with site- cast reinforced- concrete bearing walls using tunnel forms, the floors and roofs are generally constructed of

Accepted Answer

In high-rise residential buildings constructed with site-cast reinforced-concrete bearing walls using tunnel forms, the floors and roofs are typically made of cast-in-place concrete, not precast elements, steel components, or lumber. This method allows for a monolithic structure where the walls, floors, and roofs are all integrally cast together for improved structural integrity and fire resistance. None of the options provided (A-D) accurately describe this construction method.

Question 11

Where the cutting of masonry units is discouraged, the wall dimensions are based on the masonry module. The module used in CMU walls is

Accepted Answer

The module used in CMU walls is typically 8 inches, which means the dimensions of the wall are based on multiples of 8 inches to minimize the need for cutting units. This results in walls that are more efficient to construct and have fewer joints or seams.

Question 12

Compared to a longitudinal- bearing wall floor plan, a cross- bearing wall floor plan generally gives larger exterior wall openings.

Accepted Answer

A cross-bearing wall floor plan typically has fewer interior walls, allowing for larger exterior wall openings.

Question 13

A bond beam in a masonry bearing wall building is required for structural reasons

Accepted Answer

A bond beam is a reinforced concrete beam placed horizontally in a masonry bearing wall for structural reasons. It helps to distribute the loads evenly across the wall and provide overall stability to the structure. Bond beams are typically required at each floor level and roof level to ensure the building has adequate structural support at these critical points. While bond beams may also be placed at other locations such as the top of the parapet or above openings in exterior walls, these are not always necessary for structural reasons and may be specified based on the specific design requirements of the building. Therefore, the best choice is B, which indicates bond beams are required at the critical points of each floor level and roof level.

Question 14

the keyway between precast- concrete hollow- core slabs runs perpendicular to the bearing walls.

Accepted Answer

This is a common design for precast concrete hollow-core slabs. The keyway, which is a recessed channel, is typically designed to run perpendicular to the bearing walls to ensure proper load transfer and structural stability.

Question 15

The formwork used in constructing site- cast reinforced- concrete walls and floors simultaneously consists of

Accepted Answer

Sheet steel tunnel forms are commonly used in constructing site-cast reinforced-concrete walls and floors simultaneously. These forms serve as a mold to create the shape and size of the concrete structure. The tunnel forms consist of side walls, end walls, and a bottom surface that define the shape of the structure. Reinforcing steel is placed between the sides and held in place by spacers until the concrete is poured. Once the concrete has hardened, the forms are removed, and the structure remains. Insulating concrete forms, sheet steel gang forms, and horizontal and vertical plywood forms are used for other types of concrete constructions.

Question 16

A typical bond beam is provided with

Accepted Answer

A typical bond beam is provided with horizontal reinforcement to enhance its tensile strength and structural integrity.

Question 17

Referring to a masonry wall as a reinforced- masonry wall implies that the wall contains

Accepted Answer

The answer of Referring to a masonry wall as a...

Question 18

The structural behavior of a contemporary load- bearing masonry wall building is similar to that of

Accepted Answer

A contemporary load-bearing masonry wall building behaves similarly to a conventional wood light-frame building because both rely on walls to carry loads, as opposed to frame structures like steel or concrete frames.

Question 19

Use of the load- bearing masonry wall system became extinct for a while and was revived

Accepted Answer

The use of load-bearing masonry wall systems saw a revival after World War II, primarily due to the need for rapid reconstruction and the availability of materials and techniques that made masonry a viable option again.

Question 20

The clear height of openings in CMU walls is

Accepted Answer

The answer of The clear height of openings in CMU...

Quiz 26: Masonry and Concrete Bearing Wall Construction