Mixed Questions For Heat, Space & Distance Final Exam

A single ply roofing membrane can be installed in a wider range of temperatures compared to built-up bituminous roofing. Single ply roofing membranes are typically made from materials like EPDM, PVC, or TPO, which have good flexibility and can withstand temperature variations without cracking or becoming brittle. This allows for installation in both hot and cold weather conditions. On the other hand, built-up bituminous roofing involves multiple layers of materials, including asphalt and felt, which may not perform as well in extreme temperature conditions.

Warmer air holds more water vapor than colder air because as air temperature increases, the molecules in the air move faster and have more energy. This increased energy allows the air to hold more water vapor, as the water molecules can spread out and move more freely in the warmer air. Conversely, colder air has less energy and therefore can hold less water vapor. Therefore, there is a direct relationship between air temperature and the amount of water vapor that air can hold.

A material with a maximum permeance rating of 1 perm is considered a vapor retarder according to the traditional definition. Permeance refers to the ability of a material to allow the passage of water vapor. A lower permeance rating indicates that the material is less permeable to water vapor, thereby retarding its movement. Therefore, a material with a permeance rating of 1 perm is highly effective in preventing the passage of water vapor and is classified as a vapor retarder.

Single-ply roofing should not be mechanically fastened to the decking when a vapor retarder is required. This is because mechanically fastening the roofing to the decking can compromise the effectiveness of the vapor retarder, which is designed to prevent the passage of moisture vapor through the roofing system. Therefore, in order to maintain the integrity of the vapor retarder and ensure its proper functioning, the single-ply roofing should not be mechanically fastened to the decking.

Clear commercial glass is commonly used because of its ability to transmit light. It is known to have a transmittance range of 85 to 90 percent, which means that it allows 85 to 90 percent of light to pass through it. This level of transmittance is considered to be high and makes clear commercial glass suitable for various applications such as windows, display cases, and glass doors.

Shrubs and trees should be planted at a minimum distance of 30 feet from a building in areas where bush fires are a threat. This distance helps to reduce the risk of the fire spreading to the building and causing damage. By creating a buffer zone of 30 feet, there is a greater chance of preventing the fire from reaching the building and potentially endangering lives and property.

The correct answer is aluminum. This is because aluminum is commonly used as the frame stock material for glass curtain walls. It is lightweight, durable, and has good corrosion resistance, making it an ideal choice for this application. Carbon steel, bronze, and stainless steel are not typically used for the frame stock of glass curtain walls.

Insulating glass does not provide the added protection against infiltration that storm sash does. This means that insulating glass is not as effective in preventing air from entering or escaping a building compared to storm sash. Storm sash, on the other hand, is designed to provide an additional barrier against drafts and air leakage. This disadvantage of insulating glass can result in higher energy costs and less efficient insulation compared to using storm sash.

The roof underlayment for a shingled roof should not be a vapor retarder because a vapor retarder is a material that restricts the flow of moisture vapor. In a shingled roof, it is important to allow moisture to escape to prevent issues such as condensation and mold growth. If a vapor retarder is used as the underlayment, it can trap moisture within the roof system, leading to potential damage and deterioration. Therefore, it is recommended to use a roof underlayment that allows for the proper ventilation and release of moisture.

A dimension between sheets of glass that is most effective in stopping the transfer of heat is 3/16 to 5/8 inch. The thickness of the glass plays a crucial role in preventing heat transfer. Thicker glass provides better insulation and reduces the conduction of heat between the sheets. The range of 3/16 to 5/8 inch falls within an optimal thickness that effectively minimizes heat transfer, making it the most effective choice among the given options.

Folding doors are typically limited to heights of about 14 feet. This is because folding doors rely on a folding mechanism, which can become less stable and more challenging to operate as the height increases. Beyond 14 feet, the weight and size of the door panels may also become impractical for folding doors. Therefore, 14 feet is the maximum height at which folding doors are commonly used.

Relative humidity is a measure of the amount of water vapor present in the air compared to the maximum amount the air could hold at a specific temperature and atmospheric pressure. It is expressed as a percentage and provides information about how close the air is to being saturated with moisture. A higher relative humidity indicates that the air is holding more moisture, while a lower relative humidity indicates that the air is drier. Therefore, relative humidity is the correct answer in this context.

Bentonite clay is a viable waterproofing material because it expands when it comes into contact with water. This expansion creates a tight seal and prevents water from penetrating through the clay. This characteristic makes bentonite clay an effective choice for waterproofing applications, such as sealing foundations or creating barriers in construction projects.

The R-value of a material is a measure of its resistance to heat flow. It is calculated by dividing the thickness of the material by its thermal conductivity (k-value). In this case, the concrete wall is 8 inches thick with 2 inches of expanded polyurethane insulation applied to it. The R-value of the concrete can be calculated by dividing its thickness (8 inches) by its k-value (12.0), which gives an R-value of 0.67. The R-value of the polyurethane insulation can be calculated by dividing its thickness (2 inches) by its k-value (0.16), which gives an R-value of 12.5. Adding these two R-values together gives a total R-value of approximately 13. Therefore, the correct answer is 13.

The blue label is considered the best or premium grade of wood shingle. This label indicates that the shingle has undergone a higher level of quality control and meets the highest standards in terms of durability, appearance, and performance. It is likely that the blue label shingles are made from the highest quality wood and have undergone additional treatments or processes to enhance their longevity and resistance to weathering.

The designations Grade 20, Grade 40, and Grade 60 in the wood window industry refer to the structural performance of the wood windows. These grades indicate the strength and load-bearing capacity of the windows, with higher grades indicating better structural performance.

Scuppers are outlets that are typically located through a parapet or gravel stop. They serve the purpose of allowing water to flow from a roof, preventing any potential water buildup or damage. These outlets provide a controlled pathway for water to drain off the roof, helping to maintain the structural integrity of the building and prevent water penetration.

The correct answer is "oxide" because anodized aluminum windows and doors have a layer of oxide film on their surface. Anodizing is an electrochemical process that creates a protective layer of aluminum oxide, which enhances the metal's durability, corrosion resistance, and appearance.

Tempering is the process of rapidly and uniformly cooling glass after it has been heated. This rapid cooling creates balanced and uniform internal and surface stresses within the glass. Tempering is done to increase the strength and durability of the glass, making it less prone to breakage and shattering.

Mineral wool is a commonly used raw material for manufacturing loose fill insulations in attics and walls. It is made from natural minerals such as basalt or diabase, which are melted and spun into fibers. These fibers are then formed into loose fill insulation, providing excellent thermal and acoustic properties. Mineral wool insulation is fire-resistant, moisture-resistant, and does not promote the growth of mold or bacteria. It is also a sustainable option as it is made from abundant and recyclable materials. Overall, mineral wool is a suitable and effective choice for insulating attics and walls.

The correct answer is copper, lead, galvanized steel, aluminum, stainless steel. These materials are commonly used as flashing for walls and roofs due to their durability and resistance to corrosion. Copper is often used for its aesthetic appeal and long lifespan. Lead is malleable and easily formed, making it a popular choice. Galvanized steel is coated with zinc to prevent rusting. Aluminum is lightweight and resistant to corrosion. Stainless steel is highly durable and has excellent resistance to corrosion.

Annealing is the correct answer because it refers to the process of gradually and uniformly cooling glass after it has been heated. This process helps to relieve any random internal stresses that may have been caused by the heating, making the glass stronger and more resistant to breaking. Tempering, heat treating, and quenching are all different processes that involve cooling glass or other materials, but they are not specifically focused on relieving internal stresses in the same way that annealing is.

Tempered glass is the strongest glass among the options given. It is produced by heating the glass to a high temperature and then rapidly cooling it. This process creates internal stresses in the glass, making it much stronger than annealed or heat-strengthened glass. Tempered glass is also known for its safety features, as it breaks into small, relatively harmless pieces when shattered, reducing the risk of injury. Spandrel glass, on the other hand, is not a type of glass but rather a term used to describe opaque or decorative glass panels used in building facades.

The guidelines regarding the cutting or drilling of annealed glass on the job site state that cutting or drilling is allowed as required. This means that workers are permitted to cut or drill the glass as needed for their specific tasks or projects. There are no restrictions or limitations mentioned in the guidelines regarding the cutting or drilling of annealed glass.

Brake-forming is the most common method for shaping typical carbon steel door frames. This process involves using a brake press to bend and shape the metal into the desired form. It is a cost-effective and efficient method that allows for precise shaping and forming of the door frames. Hot rolling and cold rolling are methods used in the production of steel, but they are not typically used for shaping door frames. Extrusion is a process used for creating complex shapes, but it is not commonly used for carbon steel door frames.

Safety glazing is required in doors because it is designed to minimize the risk of injury in case the glass breaks. Safety glazing is made of materials that are less likely to shatter into sharp pieces when broken, such as laminated glass or tempered glass. This helps to prevent serious injuries from glass fragments and ensures the safety of individuals using the doors.

Treating wood for windows and sliding glass doors with toxic water-repellent agents does not provide the benefit of increased adherence to primers for finished coats of paint. While treating wood with these agents can provide benefits such as increased resistance to decay fungus and insect attack, reduced swelling and shrinking due to atmospheric conditions, and increased dimensional stability, it does not specifically enhance the adherence of primers to finished coats of paint.

Latent heat refers to the heat energy that is absorbed or released during a change of state without a change in temperature. In the case of water or ice changing to vapor, latent heat is required to break the intermolecular bonds and convert the substance to a gaseous state. This process is known as vaporization. Therefore, latent heat is the correct term to describe the heat necessary for a change of state from water or ice to vapor.

Phenolic is reported to corrode metal. Phenolic is a type of insulator that is made from a synthetic resin. It is known to have corrosive properties that can cause damage to metal surfaces. When phenolic comes into contact with metal, it can react chemically and cause the metal to corrode. This corrosion can weaken the metal and lead to structural damage over time. Therefore, phenolic is not recommended for use in applications where it will be in direct contact with metal.

Anodizing is a process that creates a protective layer on the surface of aluminum, making it more resistant to corrosion and wear. This is especially important for entrance doors that are exposed to harsh weather conditions and frequent use. Painting is another option to protect the aluminum, but anodizing provides a more durable and long-lasting finish. Mill finishing refers to the untreated surface of aluminum, which is not ideal for exterior doors. Galvanizing is a process used for steel, not aluminum. Therefore, anodizing is the most suitable option for protecting the exposed portions of aluminum entrance doors.

Solid core doors typically have a glued block core. This means that the core of the door is made up of several blocks of wood that are glued together to create a solid and sturdy core. This type of core provides better insulation and soundproofing compared to other types of cores, making it a popular choice for interior doors. The glued block core also adds strength and durability to the door, making it more resistant to warping or damage.

Rolling is a process used to form patterns on the surface of glass. In this process, a sheet of glass is passed between two rollers, which have the desired pattern engraved on their surfaces. As the glass passes through the rollers, the pattern is transferred onto its surface, creating the desired design. This method is commonly used to create textured or embossed patterns on glass, adding aesthetic appeal and enhancing its visual appearance.

To ensure that vapor can diffuse outwards after penetrating a wall, the combination of exterior materials should have a higher permeance than the interior vapor retarder and finish materials. The total installed permeance of the exterior materials should be at least five times greater than the total permeance of the interior vapor retarder and finish materials. This ensures that there is enough permeability in the exterior materials to allow for the outward diffusion of vapor, preventing moisture buildup and potential damage to the wall.

Pulverized iron is added to the cementitious waterproofing mixture to enhance its strength and durability. The iron particles help to improve the overall performance of the waterproofing material by increasing its resistance to water penetration and providing reinforcement against cracks and structural damage. This addition of pulverized iron ensures that the cementitious waterproofing is effective in preventing water seepage and maintaining the integrity of the structure.

Rigid glass fiber board insulation is primarily used for roofing systems because it provides excellent thermal insulation and is resistant to moisture and mold growth. It helps to reduce heat transfer and maintain a comfortable indoor temperature. Additionally, its rigidity and durability make it suitable for withstanding the weight and pressure of the roofing materials. This type of insulation is commonly used in commercial and residential buildings to improve energy efficiency and reduce heating and cooling costs.

Polyvinyl chloride (PVC) is the substance commonly used in plastic siding. PVC is a synthetic polymer that is known for its durability, versatility, and resistance to weathering. It is a popular choice for siding materials due to its low cost, ease of installation, and ability to withstand various environmental conditions. PVC siding is also known for its ability to mimic the appearance of other materials such as wood or stone, making it a versatile option for homeowners.

Flush doors are the most common type of wood doors used today. They have a smooth and flat surface on both sides, without any raised or recessed panels. Flush doors are popular because they have a simple and modern design that fits well with various architectural styles. They are also relatively easy to manufacture and install. Additionally, flush doors provide a clean and seamless look, making them suitable for both interior and exterior applications.

The correct answer is "Stick". In glazed curtain wall systems, the stick system is the most common. This system consists of individual components, such as vertical mullions and horizontal rails, that are assembled on-site to create the curtain wall. The stick system allows for flexibility in design and installation as each component can be adjusted and installed separately. This system is also cost-effective and allows for easier maintenance and replacement of individual components if needed.

Metallic foil requires an adjacent air space with a minimum dimension of 3/4 inch. This is because metallic foil insulation works by reflecting radiant heat. The air space acts as a barrier, preventing heat transfer through conduction and convection. The 3/4 inch dimension is necessary to create an adequate air gap for effective thermal insulation.

The correct answer is extruded aluminum. This is because extruded aluminum is commonly used in the construction of main entrance doors and their frames, as well as packaged entrances and store fronts in commercial and institutional buildings. Extruded aluminum is lightweight, durable, and resistant to corrosion, making it an ideal material for these applications. Additionally, extruded aluminum can be easily customized and shaped to meet specific design requirements.

Industry standards for flush doors restrict the size of the cutout for glazing or louvers to a maximum of 40 percent of the door. This means that the total area of the cutout cannot exceed 40 percent of the total area of the door. This limitation ensures that the structural integrity and strength of the door are maintained while allowing for some ventilation or visibility through the glazing or louvers.

The height of an opening in a hollow core door should not exceed 50 percent of the door height. This is because if the opening is too large, it can weaken the structural integrity of the door and compromise its ability to provide privacy, insulation, and soundproofing. Keeping the opening within 50 percent of the door height ensures that the door remains sturdy and functional.

Polycarbonate and acrylic are commonly used plastics for plastic glazing. Polycarbonate is known for its high impact resistance and durability, making it suitable for applications where strength is important. Acrylic, on the other hand, is valued for its clarity and transparency, making it ideal for windows and displays. Both materials are lightweight and have good weather resistance, making them suitable for outdoor use. Therefore, polycarbonate and acrylic are the preferred plastics for plastic glazing.

Polyurethane is the best insulator among the listed materials. It has a high thermal resistance and low thermal conductivity, making it an effective barrier to heat transfer. Polyurethane is commonly used in insulation applications due to its excellent insulation properties. It provides superior insulation compared to extruded polystyrene, molded polystyrene, and polyisocyanurate, making it the best choice for insulating purposes.

Normal built-up roof systems for commercial projects typically consist of three or four plies. These plies are layers of roofing material that are applied one on top of the other to provide durability and protection against the elements. The number of plies can vary depending on factors such as the specific roofing system being used and the requirements of the project. However, in general, three or four plies are commonly used in commercial roof systems.

Copper is recommended for use in contact with masonry mortar because it is highly resistant to corrosion and has excellent durability. It does not react with the chemicals present in the mortar, ensuring that it does not degrade over time. Additionally, copper has good thermal conductivity, allowing it to efficiently transfer heat away from the mortar. This helps prevent any potential damage or weakening of the mortar due to excessive heat. Overall, copper is a suitable material for use in contact with masonry mortar due to its corrosion resistance, durability, and thermal conductivity properties.

Tape sealants are often used with glazing. Glazing refers to the installation of glass or transparent materials in windows or doors. Tape sealants are used to create a watertight and airtight seal between the glazing and the surrounding frame or structure. This helps to prevent water infiltration, air leakage, and improve energy efficiency. Therefore, using tape sealants with glazing is important to ensure proper installation and performance of windows and doors.

Fatigue resistance refers to the ability of a material, in this case flat glass, to withstand repeated loading and unloading without experiencing permanent deformation or failure. It is the ability of the glass to return to its original flat shape after being deformed. This property is important in applications where the glass is subjected to cyclic or repetitive loads, such as in buildings or vehicles, as it ensures the durability and longevity of the material.

Spandrel glass is typically used at the floor lines of a building facade. This is because spandrel glass is opaque and is used to hide the floor slabs, columns, and other structural elements behind the facade. It provides a uniform appearance to the building by concealing the non-aesthetic components. Additionally, spandrel glass helps in maintaining the thermal and acoustic insulation of the building while also providing privacy to the occupants.

Foamed in place insulations are made of polystyrene. Polystyrene is a lightweight and rigid plastic material that is commonly used for insulation purposes. It has excellent thermal insulation properties and is resistant to moisture, making it an ideal choice for insulating buildings and other structures. Polystyrene foam can be easily sprayed or injected into cavities, creating a seamless and efficient insulation barrier. It also provides sound insulation and is fire-resistant, further enhancing its suitability for insulation applications.