Mixed Questions For Heat, Space & Distance Final Exam

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1. Which membrane roofing can be installed  in the wider range of temperatures?

Explanation

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.

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About This Quiz
Mixed Questions For Heat, Space & Distance Final Exam - Quiz

This final exam assesses knowledge in heat transfer, vapor dynamics, and related physical properties. It covers concepts like latent heat, relative humidity, and vapor barriers, crucial for understanding environmental control in buildings and other applications.

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2. Can warmer air hold more or less water vapor than colder air or does it make any difference?

Explanation

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.

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3. What is the maximum permeance rating that, by traditional definition, a material can have and be called a vapor retarder?

Explanation

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.

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4. When should single-ply roofing not be mechanically fastened to the decking?

Explanation

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.

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5. Commonly used clear commercial glass has a transmittance of about...

Explanation

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.

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6. What is the minimum distance from a building that shrubs and trees should be planted where bush fires are a threat?

Explanation

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.

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7. The frame stock of glass curtain walls today is typically made of...

Explanation

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.

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8. Identify a disadvantage of insulating glass compared to storm sash?

Explanation

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.

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9. The roof underlayment for a shingled rood..

Explanation

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.

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10. What dimensions between sheets of glass is most effective in stopping the transfer of heat?

Explanation

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.

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11. Folding doors are usually limited to heights of about...

Explanation

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.

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12. The ratio of the actual amount of water vapor in the air compared to the maximum amount the same air could contain at a specific temperature and atmospheric pressure is..

Explanation

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.

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13. The key characteristic of betonite clay that makes it a viable waterproofing is that it..

Explanation

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.

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14. What is the approximate R value of a concrete wall 8 inches thick with 2 inches of expanded polyurethane insulation applied to it? (the k value for concrete is 12.0. The k value for the expanded polyurethane is 0.16)

Explanation

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.

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15. The best or premium grade of wood shingle is...

Explanation

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.

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16. The designations Grade 20, Grade 40, and Grade 60 as defined by standards of the wood window industry refer to what aspect of wood windows?

Explanation

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.

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17. Scuppers are..

Explanation

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.

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18. What kind of film covers the surface of anodized aluminum windows and doors?

Explanation

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.

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19. Tempering is....

Explanation

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.

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20. Most loose fill insulations in use today in attics and walls is manufactured from, among other raw materials...

Explanation

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.

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21. The metal materials generally used as flashing for walls and roofs include...

Explanation

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.

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22. The gradual and uniform cooling of glass that has been heated in order to relieve random internal stresses is...

Explanation

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.

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23. Identify the strongest glass given equal thicknesses

Explanation

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.

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24. What guidelines apply regarding the cutting or drilling of annealed glass on the job site?

Explanation

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.

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25. What is the most common method for shaping typical carbon steel door frames?

Explanation

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.

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26. Glazing in doors is required to be...

Explanation

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.

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27. Which is not a benefit of treating wood for windows and sliding glass doors with toxic water-repellent agents?

Explanation

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.

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28. The heat necessary for a change of state from water or ice to vapor is known as...

Explanation

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.

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29. Which insulator is reported to corrode metal?

Explanation

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.

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30. Most exposed portions of aluminum entrance doors are...

Explanation

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.

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31. Most solid core doors have what kind of core?

Explanation

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.

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32. Patterns are formed in the surface of glass by...

Explanation

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.

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33. To insure outward diffusion of vapor  that has penetrated a wall, the combination of exterior materials should have a total installed permeance of at least how many times the total permeance of the interior vapor retarder plus the interior finish materials?

Explanation

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.

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34. One type of cementitious waterproofing contains Portland cement, aggregate, a plastic admixture, and...

Explanation

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.

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35. Rigid glass fiber board insulation is used primarily for...

Explanation

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.

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36. What is the substance of common plastic siding?

Explanation

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.

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37. Most wood doors today are...

Explanation

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.

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38. Which system constitutes most glazed curtain wall systems?

Explanation

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.

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39. Which insulating product requires an adjacent air space with a minimum dimension of 3/4 inch?

Explanation

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.

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40. Most main entrance doors and their frames, and packaged entrances and store fronts in commercial and institutional buildings are made from..

Explanation

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.

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41. For flush doors, industry standards limit the size of the cutout for glazing or louvers to a maximum of what percent of the door?

Explanation

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.

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42. THe height of an opening in a hollow core door should not exceed what percentage of the door height?

Explanation

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.

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43. The plastics used for plastic glazing are...

Explanation

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.

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44. Which material listed is the best insulator?

Explanation

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.

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45. How many plies are there in normal built-up roof systems for commercial projects?

Explanation

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.

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46. Which material is recommended for use in contact with masonry mortar?

Explanation

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.

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47. Tape sealants are often used with..

Explanation

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.

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48. The ability of flat glass to return to its original flat shape after loading which has deformed it is removed is called...

Explanation

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.

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49. Spandrel glass is typically used...

Explanation

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.

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50. Foamed in place insulations are, among other materials made of...

Explanation

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.

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51. A coping is located..

Explanation

A coping is a protective cap or covering that is typically placed on top of a wall or parapet to prevent water from seeping into the underlying structure. It acts as a barrier against the elements and helps to redirect water away from the building. Therefore, it makes sense for a coping to be located at the top of a parapet, as this is where it would be most effective in fulfilling its purpose.

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52. The exposed surface of oil-based caulking compounds...

Explanation

The exposed surface of oil-based caulking compounds should be painted each time the adjacent wall is painted. This is because oil-based caulking compounds tend to dry and harden over time, which can cause the surface to crack or become brittle. By painting the surface regularly, it helps to protect and maintain the caulking, preventing any potential damage or deterioration.

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53. When mild steel fasteners are used to secure the components of aluminum doors and windows...

Explanation

When mild steel fasteners are used to secure the components of aluminum doors and windows, they are plated with zinc, cadmium or similar material. This plating helps to prevent corrosion and ensures that the fasteners do not react with the aluminum, which could lead to galvanic corrosion. By using plated fasteners, the longevity and durability of the doors and windows are increased.

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54. Which insulation is used most in the PB EIFS?

Explanation

Molded polystyrene is the most commonly used insulation in PB EIFS. This type of insulation is lightweight, rigid, and offers excellent thermal insulation properties. It is also resistant to moisture, making it suitable for exterior applications. Molded polystyrene insulation is easy to install and provides good dimensional stability, ensuring long-term performance and durability. Additionally, it has a high compressive strength, making it suitable for use in EIFS systems where the insulation is exposed to external pressures.

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55. The superior roofing material for built up roofing applications is...

Explanation

Coal tar is the superior roofing material for built up roofing applications because it provides excellent waterproofing and durability. It has a longer lifespan compared to other materials like asphalt and creosote. Coal tar also has superior resistance to UV rays, chemicals, and high temperatures, making it a reliable choice for roofing. Additionally, coal tar has self-healing properties, which allows it to seal small cracks and prevent water leakage. Overall, coal tar is the preferred option for built up roofing due to its long-lasting performance and ability to withstand harsh weather conditions.

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56. In a building (heated in the winter), on which side of the insulation should the vapor retarder be placed?

Explanation

The vapor retarder should be placed on both sides of the insulation in a heated building during the winter. This is because the vapor retarder helps to prevent moisture from entering the insulation and causing damage. Placing it on both sides ensures that moisture is blocked from both the cold and warm sides, reducing the risk of condensation and potential damage to the insulation.

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57. The method of securing insulation within a framed wall known as "friction-fit" is available in what form of insulation product?

Explanation

The method of securing insulation within a framed wall known as "friction-fit" is available in the form of batts and blankets. Batts and blankets are flexible insulation products that can easily be cut and fit into the spaces between wall studs. They are designed to be friction-fit, meaning they can be pressed tightly into place without the need for additional fasteners or adhesives. This method ensures that the insulation stays in place and effectively fills the wall cavities, reducing heat transfer and improving energy efficiency.

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58. If wood doors appear to be warped prior to installation..

Explanation

If wood doors appear to be warped prior to installation, the best way to restore flatness is by stacking them flat under uniformly distributed weights. This method helps to exert equal pressure on the doors, gradually straightening them out over time. Steaming the doors intermittently or applying torque in the opposite direction of the warp may not be effective in restoring flatness. Returning the doors to the supplier may be an option, but stacking them flat under weights is a practical solution that can be done on-site.

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59. What kind of glass is the rolling process used to make in the United States today?

Explanation

The rolling process is used to make wired glass in the United States today. Wired glass is a type of glass that has a wire mesh embedded within it, providing added strength and safety. This type of glass is commonly used in areas where fire resistance is required, such as in windows and doors of commercial buildings. The rolling process involves passing the molten glass through a series of rollers to achieve the desired thickness and shape.

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60. Which system of dampproofing is typically used on either the interior or exterior of buildings?

Explanation

Asphalt based cold-applied bituminous dampproofing is typically used on either the interior or exterior of buildings. This type of dampproofing is applied using cold methods, meaning it does not require heat for installation. It is made from asphalt, which provides a durable and waterproof barrier against moisture. This type of dampproofing is commonly used in construction to prevent the penetration of water or moisture into the building structure, ensuring the longevity and integrity of the building.

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61. What is the recommended practice regarding building paper, board sheathing, and wood shingles on walls?

Explanation

Building paper is applied to the face of the sheathing to provide a moisture barrier and protect the sheathing from water infiltration. This practice helps to prevent damage to the sheathing and the interior of the building due to moisture. By applying the building paper to the face of the sheathing, it acts as a protective layer between the sheathing and the exterior finish materials, such as wood shingles. This helps to ensure the longevity and durability of the wall assembly.

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62. Why should gypsum board be attached to furring instead of glued to plastic foam board insulation?

Explanation

The reason gypsum board should be attached to furring instead of glued to plastic foam board insulation is because the heat from a fire could melt the plastic, causing the gypsum board to fall off. This suggests that attaching the gypsum board to furring provides a more secure and fire-resistant installation method compared to gluing it to plastic foam board insulation.

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63. Which National Fire Protection document identifies the various components of fire safety and shows their relationship to each other

Explanation

NFPA 550 is the correct answer because it is the National Fire Protection document that identifies the various components of fire safety and shows their relationship to each other. This document provides guidelines and standards for fire safety management, including fire prevention, fire detection, and fire suppression. It helps ensure that all necessary components of fire safety are in place and working together effectively to protect lives and property from fire hazards.

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64. Which type of metal door frame should not be filled with mortar when installed in a masonary wall?

Explanation

Copper-alloy metal door frames should not be filled with mortar when installed in a masonry wall because copper is a soft metal that can be easily damaged by the corrosive properties of the mortar. Filling the frame with mortar could lead to deterioration and weakening of the copper-alloy frame over time.

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65. Double hung windows with integral storm sash are typically the...

Explanation

Double hung windows with integral storm sash are typically the three-track type. This means that there are three separate tracks within the window frame, allowing for the movement of both the regular window sash and the storm sash. The storm sash is typically installed on the exterior track, providing an additional layer of protection against the elements. The three-track design allows for easy operation of both the regular window and the storm sash, providing flexibility and convenience for the user.

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66. What is the plastic inter layer in laminated glass?

Explanation

Polyvinyl butyral is the plastic interlayer commonly used in laminated glass. It is a strong and transparent material that adheres the glass layers together, providing structural integrity and safety. Polyvinyl butyral has excellent impact resistance and can hold the glass fragments together in case of breakage, reducing the risk of injury. Additionally, it offers sound insulation and UV protection, making it a popular choice for automotive and architectural applications.

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67. Low-E glass...

Explanation

Low-E glass is designed to have a minimal amount of energy radiating to the interior space. This means that it reflects a significant portion of the sun's radiant energy back outside, preventing it from entering the interior and reducing heat gain. By minimizing the amount of energy radiated inside, Low-E glass helps to keep the interior space cooler and reduce the need for air conditioning or other cooling methods.

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68. What is the minimum board size and maximum span of the board sheathing which supports clay or concrete roofing tile?

Explanation

The correct answer is 1 x 6 spanning 24 inches. This means that the minimum board size required to support clay or concrete roofing tile is 1 x 6, and it should be able to span a maximum distance of 24 inches. This larger board size and span is necessary to provide adequate support for the heavier weight of the roofing tiles.

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69. The two standard core constructions for hollow core doors are..

Explanation

The correct answer is ladder and mesh. Hollow core doors are typically constructed using a combination of a ladder-like structure and a mesh material. The ladder provides stability and support to the door, while the mesh is used to fill the gaps and create a solid surface. This construction method helps to reduce the weight of the door while maintaining its strength and durability.

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70. The chief ingredients of building glass are...

Explanation

The chief ingredients of building glass are calcium oxide, silica, and sodium oxide. Calcium oxide, also known as lime, is added to the glass mixture to improve its chemical durability and increase its resistance to weathering. Silica, in the form of sand, is the main component of glass and provides its structural strength. Sodium oxide helps to lower the melting point of the glass and improve its workability during the manufacturing process. These three ingredients, when combined in the right proportions, create a strong and durable glass suitable for building applications.

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71. A factor in the detailing of tinted glass that is particularly problematic because of the tinted quality of the glass is...

Explanation

Tinted glass can be more susceptible to expansion and contraction compared to regular glass due to the tinting process. The tinting can affect the thermal properties of the glass, causing it to expand and contract at different rates when exposed to temperature changes. This can lead to stress on the glass, potentially causing cracks or breakage. Therefore, the expansion and contraction of the glass is a particularly problematic factor in the detailing of tinted glass.

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72. What guidelines apply regarding the cutting or drilling of tempered glass on the job site?

Explanation

Tempered glass is a type of glass that is treated to increase its strength and durability. However, this process also makes it more prone to shattering if it is cut or drilled. Therefore, cutting or drilling tempered glass is not allowed on the job site to prevent any potential accidents or damage to the glass.

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73. What is a disadvantage of acrylic and polycarbonate when used as glazing compared to glass?

Explanation

Acrylic and polycarbonate are subject to surface scratches, which is a disadvantage compared to glass. This means that over time, the glazing material may become damaged and lose its clarity, affecting visibility and aesthetics. Surface scratches can also compromise the durability and longevity of the glazing, potentially leading to the need for replacement or repairs.

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74. Identify the true statement regarding wood flush doors.

Explanation

Wood flush doors are not recommended for exterior use because they are not designed to withstand the harsh weather conditions and exposure to moisture. Exterior doors need to be more durable and resistant to elements such as rain, sunlight, and temperature fluctuations. Therefore, it is recommended to use other types of doors specifically designed for exterior use, such as solid wood doors or metal doors, which have better resistance to weathering and provide better security.

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75. Most stock wood windows and sliding glass doors are manufactured from...

Explanation

Ponderosa pine is commonly used in the manufacturing of stock wood windows and sliding glass doors. It is a durable and versatile wood that offers good stability and resistance to decay. Its straight grain and uniform texture make it suitable for producing high-quality windows and doors. Additionally, ponderosa pine is readily available and relatively affordable, making it a popular choice in the industry.

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76. What practice is recommended when installing hot-applied built-up roofing over polyisocyanurate, polyurethane, and phenolic foam insulations

Explanation

When installing hot-applied built-up roofing over polyisocyanurate, polyurethane, and phenolic foam insulations, it is recommended to place a layer of wood fiber, perlite, or glass fiber board insulation between these plastic insulations and the hot roofing. This is necessary to prevent the high temperatures of the hot roofing from damaging or melting the plastic insulations.

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77. What does each of the letters in the four letter system of generic designations to describe built-up roofing systems represent? Identify the correct items and the correct order.

Explanation

not-available-via-ai

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78. What relationship should sealants have to the substance in the back of the joint sealed?

Explanation

The sealant should not be adhered to the back substrate because it allows for movement and flexibility in the joint. If the sealant were to adhere to the back substrate, it could restrict the joint's ability to expand and contract, leading to potential damage or failure of the seal. By not adhering to the back substrate, the sealant can accommodate the movement of the joint and maintain its effectiveness in sealing out moisture or other substances.

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79. Float glass is manufactured by floating the molten glass on a substance that is composed of mostly....

Explanation

Float glass is manufactured by floating the molten glass on a substance that is composed mostly of tin. This process is called the float glass method. The molten glass spreads out and forms a smooth and flat surface on the molten tin, resulting in a high-quality glass with uniform thickness. Tin is used because it has a low melting point and does not react with the glass, allowing for a stable and controlled manufacturing process.

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Identify a disadvantage of insulating glass compared to storm sash?
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Tempering is....
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Identify the strongest glass given equal thicknesses
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Most exposed portions of aluminum entrance doors are...
Most solid core doors have what kind of core?
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Rigid glass fiber board insulation is used primarily for...
What is the substance of common plastic siding?
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THe height of an opening in a hollow core door should not exceed what...
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Double hung windows with integral storm sash are typically the...
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Low-E glass...
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The two standard core constructions for hollow core doors are..
The chief ingredients of building glass are...
A factor in the detailing of tinted glass that is particularly...
What guidelines apply regarding the cutting or drilling of tempered...
What is a disadvantage of acrylic and polycarbonate when used as...
Identify the true statement regarding wood flush doors.
Most stock wood windows and sliding glass doors are manufactured...
What practice is recommended when installing hot-applied built-up...
What does each of the letters in the four letter system of generic...
What relationship should sealants have to the substance in the back of...
Float glass is manufactured by floating the molten glass on a...
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