Masonry Quiz

Fall protection devices are designed to prevent or minimize the risk of falling from heights. The statement suggests that wearing a fall protection device is necessary when a person is 6 feet above the ground. This is because falls from this height can still result in serious injuries. Wearing a fall protection device ensures the safety of the person by providing a means of preventing falls or reducing the impact in case of a fall. Therefore, it is important to wear a fall protection device when working at a height of 6 feet or more.

A CMU stands for Concrete Mason Units. It refers to a type of brick or block that is made of concrete and commonly used in construction. Unlike bricks made of stone, clay, or mud, CMUs are specifically made from concrete material. They are known for their strength, durability, and versatility, making them a popular choice in building projects.

Portland cement is indeed hygroscopic, which means that it has the ability to absorb moisture from its surroundings. When it comes into contact with skin, it can draw out moisture, leading to skin irritation. This is why it is important to handle Portland cement with caution and to take necessary precautions, such as wearing protective gloves, to avoid any potential skin issues. Therefore, the given answer "True" is correct.

The American Society for Testing and Materials (ASTM) sets the standards for masonry design and construction. This organization is responsible for developing and publishing technical standards that ensure the quality and safety of materials, products, systems, and services used in various industries, including masonry. Their standards cover a wide range of aspects related to masonry, such as materials specifications, testing methods, installation practices, and performance requirements. By following ASTM standards, masonry professionals can ensure that their work meets industry best practices and meets the necessary quality and safety standards.

A cube is a three-dimensional shape with six equal square faces. Since each face of the cube is made up of standard bricks, the total number of standard bricks in the cube can be calculated by finding the total number of square faces and multiplying it by the number of standard bricks in each face. As there are six square faces in a cube and each face contains 100 standard bricks, the total number of standard bricks in the cube is 6 x 100 = 600. Therefore, the given answer of 500 is incorrect.

The lanyard on a safety harness should be 6 feet long. This length allows for enough slack to move around and work comfortably while still providing adequate fall protection. A shorter lanyard may restrict movement, while a longer one could increase the risk of injury in the event of a fall. Therefore, a 6-foot lanyard is the recommended length for safety harnesses.

Before cutting a brick, it is necessary to score it. Scoring involves making a shallow cut or groove along the surface of the brick using a scoring tool or a chisel. This helps to create a guide for the actual cut and prevents the brick from cracking or breaking in an unintended way. Scoring allows for a cleaner and more precise cut when splitting or ripping the brick.

Rip blocks are often used under windows to provide support and stability. They help to prevent the windows from shifting or settling, ensuring that they remain level and secure. Rip blocks are typically made of durable materials such as concrete or stone, and they are installed during the construction or renovation of a building. Placing rip blocks under windows helps to distribute the weight evenly and reduce the risk of damage or structural issues over time.

A contractor is the highest career stage for a mason. As a contractor, a mason has reached a level of expertise and experience where they are able to manage and oversee construction projects independently. Contractors have the knowledge and skills to handle all aspects of masonry work, including planning, organizing, and supervising the construction process. They are responsible for hiring and managing a team of masons, ensuring that projects are completed on time and within budget. Contractors often have their own businesses and may take on larger and more complex projects.

Cavity walls are used for slowing down moisture because they consist of two layers of brick or concrete with a gap in between. This gap acts as a barrier, preventing moisture from penetrating through the wall. The air trapped within the cavity helps to insulate the building and reduces the risk of dampness and condensation. This design is particularly useful in areas with high rainfall or where moisture is a common problem.

Type "O" mortar is a low-strength mortar that is primarily used for non-bearing applications. Non-bearing walls are walls that do not carry any structural load, such as interior partition walls or decorative walls. Type "O" mortar is not suitable for load-bearing applications as it has a lower compressive strength compared to other types of mortar. It is commonly used for non-structural purposes where strength requirements are not as critical, but still require a durable and workable mortar.

Furrowing is the act of shaping the bed joint before laying a masonry unit on it. This involves creating a groove or furrow in the mortar to provide a secure and even base for the masonry unit. By furrowing, the mason ensures that the unit will be properly aligned and adhered to the mortar, resulting in a strong and stable structure.

Solid masonry units are designed to have a minimal amount of voids on their surface. This is important for structural integrity and durability of the units. Having a higher percentage of voids can weaken the masonry and make it more prone to damage or collapse. Therefore, solid masonry units typically have 25 percent or less of their surface as a void, ensuring a solid and strong construction.

Joseph Aspdin is credited with inventing Portland cement. In 1824, he patented a process for producing a hydraulic cement by burning a mixture of limestone and clay at high temperatures. This resulted in a finely ground powder that, when mixed with water, formed a strong and durable cement. Aspdin named this new cement after the resemblance of its color to the stone quarried on the Isle of Portland in Dorset, England. His invention revolutionized the construction industry and laid the foundation for modern cement production.

The cleaning method for cleaning glazed brick is using a bucket and brush. This method involves manually scrubbing the surface of the brick with a brush and water or a cleaning solution. It is a more gentle and controlled approach compared to other methods like sandblasting, high-pressure water, or steam cleaning, which may be too harsh and potentially damage the glazed surface of the brick.

Concrete brick is more popular in some areas of the country because it is less expensive compared to other materials. This affordability makes it a preferred choice for construction projects, especially in regions where cost is a significant factor. Additionally, the durability and strength of concrete brick contribute to its popularity, as it can withstand various weather conditions and provide long-lasting structures. While aesthetics may also play a role, the primary reason for its popularity in these areas is its cost-effectiveness.

Type "K" mortar is used for preservation and restoration purposes. This type of mortar has a low compressive strength and high flexibility, making it suitable for repairing and repointing old masonry structures. It is commonly used to restore historical buildings and structures, as it helps to maintain the original aesthetics and integrity of the construction. The high flexibility of type "K" mortar allows it to accommodate the natural movement and settling of older buildings without causing damage.

A cube traditionally holds 500 standard bricks or 90 blocks.

Brick is the oldest manufactured building material, invented thousands of years ago. It has been used in construction for centuries due to its durability, strength, and versatility. Bricks are made by shaping clay or other materials into rectangular blocks and then firing them in a kiln to harden. The use of bricks can be traced back to ancient civilizations such as the Mesopotamians and Egyptians. They have since been widely used in various architectural styles and continue to be a popular choice in construction today.

The most common type of forklift accidents is forklift hitting a pedestrian. This is because forklifts are often used in busy work environments where there are pedestrians present. If proper safety measures are not followed or if the forklift operator is not vigilant, accidents can occur resulting in the forklift colliding with a pedestrian. This type of accident can cause serious injuries or even fatalities, making it the most common and dangerous type of forklift accident.

Comers are also referred to as "leads."

The answer "clay products" is not part of the 3 general types of structural brick masonry units. The three general types are solid, hollow, and architectural terra cotta. Clay products, although related to brick masonry, do not fall under the specific category of structural brick masonry units.

Joint reinforcement ties are welded together by rectangle and triangle cross bracing. This means that the joint reinforcement ties have a combination of rectangular and triangular shapes, which are used to provide additional strength and stability to the joints. The rectangular shape helps to distribute the load evenly, while the triangular shape helps to resist lateral forces and prevent the joint from shifting or cracking. By using this combination of shapes, the joint reinforcement ties can effectively reinforce the joints and ensure their structural integrity.

A chemical compound should be tested on a section of wall that is 4 x 5. This size provides a sufficient area for testing the compound's effects on the wall surface. A larger section would require more of the compound and may not accurately represent the impact on a smaller area, while a smaller section may not provide enough surface area for observation and analysis. Therefore, a 4 x 5 section is a suitable choice for testing the chemical compound.