Roofing System Quiz

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1. Roof for entry of light?

Explanation

send your feedbacks in "architalk page". In this question, skylight is a part of a "roof" ( or the entire roof) that emits or accepts daylight while a clerestory is a "window" that functions the same but parallel to wall or admits light from the wall not from the roof.

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About This Quiz
Roofing System Quiz - Quiz

Explore key aspects of roofing systems through the Roofing System Quiz. Assess your knowledge on gutter sizes, purlin spacing, truss components, and ideal roofing types for various structures.... see morePerfect for students and professionals in architecture and construction fields. see less

2. Where is the gutter attached?

Explanation

The gutter is attached to the fascia board. The fascia board is a long, straight board that runs along the lower edge of the roof. It is typically made of wood or metal and is used to support the bottom row of roof tiles or shingles. The gutter is attached to the fascia board using brackets or hangers, allowing it to collect and redirect rainwater away from the roof and foundation of the building.

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3. Steel coated with zinc is also called?

Explanation

Steel coated with zinc is also called galvanized because galvanization is the process of applying a protective zinc coating to steel or iron to prevent rusting. This process involves immersing the steel in a bath of molten zinc, which forms a metallurgical bond with the steel, creating a protective layer. Galvanized steel is highly resistant to corrosion and is commonly used in outdoor applications such as construction, automotive, and agricultural industries.

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4. What is a system of triangles used to support of roof?

Explanation

A truss is a system of triangles used to support a roof. Triangles are the strongest shape and provide stability and strength to the structure. Trusses are commonly made of steel or wood and are designed to distribute the weight of the roof evenly, preventing sagging or collapse. They are often used in larger buildings or structures where a strong and reliable support system is required.

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5. What do you call the vertical and diagonal members of a truss?

Explanation

The vertical and diagonal members of a truss are called web members. These members are responsible for providing support and stability to the truss structure. They help distribute the load and prevent any excessive bending or twisting. The term "web" refers to the interconnected network of these members, which resemble a web-like pattern when viewed from the side. Therefore, web members is the correct term to describe these components of a truss.

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6. What type of roofing is ideal for forested area?

Explanation

A steep gable roof is ideal for a forested area because it has a high pitch, which allows for easy shedding of leaves, branches, and other debris that may fall from the surrounding trees. The steep angle also helps to prevent the accumulation of snow during winter months. Additionally, the gable design provides good ventilation and allows for efficient drainage of rainwater, reducing the risk of leaks or water damage.

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7. An opening in the side of the building, as in a parapet, for draining off rainwater?

Explanation

A scupper is an opening in the side of a building, typically found in a parapet, that is used to drain off rainwater. It allows water to flow out of the building, preventing it from accumulating and causing damage. Roof drains and gutters are also used for rainwater drainage, but they are not specifically openings in the side of the building like scuppers. Gargoyles, on the other hand, are decorative features often found on buildings, but they do not serve the purpose of draining off rainwater.

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8. What type of roof is ideal for warehouse or factory?

Explanation

Long span G.I. is the ideal type of roof for a warehouse or factory because it offers several advantages. It is made of galvanized iron, which provides durability and strength, making it suitable for large industrial structures. The long span design allows for wider roof coverage, reducing the need for additional support columns and maximizing the usable space inside the warehouse or factory. Additionally, G.I. roofs are resistant to corrosion and can withstand harsh weather conditions, making them a reliable choice for industrial buildings.

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9. What type of roof is ideal for a beach rest house?

Explanation

Shingles are the ideal type of roof for a beach rest house because they are durable, weather-resistant, and provide good insulation. They can withstand the harsh coastal conditions, including strong winds, saltwater exposure, and intense sunlight. Shingles also come in a variety of colors and styles, allowing homeowners to choose a design that complements the beach aesthetic. Additionally, shingles are relatively easy to install and maintain, making them a practical choice for a beach rest house.

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10. It is used to attached aluminum gutter to roof?

Explanation

Rivets are used to attach aluminum gutters to the roof. Rivets are fasteners that consist of a cylindrical shaft with a head on one end. They are inserted into pre-drilled holes and then deformed on the other end to create a permanent connection. Rivets are commonly used in applications where a strong and secure joint is required, such as attaching gutters to roofs.

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11. It is a material used to waterproof GI gutters

Explanation

Vulcaseal is a material commonly used to waterproof surfaces, including GI gutters. It forms a protective barrier that prevents water from seeping through and causing damage. This makes it an ideal choice for sealing and protecting gutters, as it ensures they remain watertight and durable. Other options listed, such as rivets, contact cement, and liquid cement, may have different applications but are not specifically designed for waterproofing gutters. Therefore, vulcaseal is the correct answer for this question.

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12. The distance between two structural supports?

Explanation

The span refers to the distance between two structural supports. It is the length between two points of support, such as columns or beams, and determines the overall length of a structure. The span is an important factor in determining the structural integrity and load-bearing capacity of a building or bridge. It is crucial to consider the span when designing and constructing a structure to ensure it can safely support the intended load.

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13. Which does not require waterproofing?

Explanation

A ground floor toilet does not require waterproofing because it is already located on the ground level, where there is less risk of water damage compared to higher floors. The ground floor is typically built on a solid foundation, making it less susceptible to water leakage or seepage. Additionally, the ground floor toilet is usually designed with proper drainage systems in place to prevent water accumulation and ensure efficient water flow. Therefore, waterproofing measures are not as necessary for a ground floor toilet as they would be for other areas such as a balcony over a lanai, 2nd floor toilet, or a terrace deck.

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14. An opening in the side of the building, as in a parapet, for draining off rainwater?

Explanation

A scupper is an opening in the side of a building, typically found in a parapet, that is used to drain off rainwater. It is designed to redirect water away from the building's walls and foundation to prevent damage. Gargoyles are decorative water spouts often found on buildings, but they do not serve the same purpose as a scupper. A roof drain is a specific type of drainage system for rooftops, while a gutter is a trough that collects and channels rainwater from the roof. Therefore, the most appropriate answer for an opening in the side of a building for draining rainwater is a scupper.

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15. How is the top chord connected to bottom chord as shown in the figure?

Explanation

The top chord is connected to the bottom chord using a gusset plate. A gusset plate is a flat plate that is used to connect two or more structural members together. It is typically made of steel and is welded to the top and bottom chords, providing a strong and stable connection between them. This type of connection is commonly used in truss structures to ensure structural integrity and load-bearing capacity.

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16. For polycarbonate roofing, what is the gap for?

Explanation

The gap in polycarbonate roofing is for thermal expansion. Polycarbonate is a material that expands and contracts with changes in temperature. If there is no gap provided, the roofing may crack or become damaged due to the stress caused by thermal expansion. By allowing for a gap, the roofing can expand and contract freely without causing any cracks or damage.

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17. Which has a minimum of 5 years warranty?

Explanation

Roof deck water proofing has a minimum of 5 years warranty because it is a specialized waterproofing system designed to protect the roof deck from water damage. This type of waterproofing is typically applied to flat or low-sloped roofs and is made to withstand heavy rain, snow, and other weather conditions. The minimum 5-year warranty ensures that the roof deck will remain protected from water infiltration for at least that period of time.

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18. How are gutters joined?

Explanation

Gutters are joined using aluminum rivets. Aluminum rivets are commonly used in gutter installation because they are lightweight, durable, and resistant to corrosion. They provide a secure and long-lasting connection between gutter sections, ensuring that they stay in place and effectively channel water away from the building. Additionally, aluminum rivets are easy to install and can be used on various types of gutters, making them a popular choice among professionals and DIY enthusiasts.

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19. Most common roofing size?

Explanation

The most common roofing size is typically between 6m-12m. This range is commonly used in construction and is suitable for most residential and commercial buildings. It provides a good balance between cost, practicality, and aesthetics. Sizes such as 6m-10m, 6m-20m, and 5m-10m are less common and may be used for specific purposes or in unique circumstances.

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20. Where should be the water proofing be installed?

Explanation

The waterproofing should be installed in between the slab and toppings to provide a protective layer that prevents water from seeping into the structure. This location ensures that any water that may penetrate the toppings does not reach the slab, protecting the underlying structure from water damage. Installing the waterproofing above FFL or above the floor topping would not effectively prevent water infiltration, while installing it under the slab would make it difficult to access and maintain.

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21. A material used for roofing that melts when exposed to the sun, hence is transformed as one?

Explanation

Asphalt is a material used for roofing that melts when exposed to the sun. This property allows it to transform and conform to the shape of the roof, creating a tight and waterproof seal. Asphalt is commonly used in roofing due to its durability, affordability, and ease of installation.

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22. What is the main reason why waterproofing and paint sometimes do not adhere to the surface?

Explanation

Surface preparation is the main reason why waterproofing and paint sometimes do not adhere to the surface. Proper surface preparation is crucial for the adhesion of paint and waterproofing materials. If the surface is not properly cleaned, sanded, or primed, the paint or waterproofing may not be able to bond effectively with the surface, leading to poor adhesion and potential failure. The surface needs to be free from dirt, dust, grease, and other contaminants to ensure a strong bond between the material and the surface.

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23. What type of roof is ideal for sidewalk?

Explanation

Polycarbonate is the ideal type of roof for a sidewalk because it is lightweight, durable, and transparent. It allows natural light to pass through, creating a bright and inviting space while still providing protection from the elements. Polycarbonate roofs are also resistant to UV rays, ensuring that they do not yellow or become brittle over time. Additionally, polycarbonate is easy to install and maintain, making it a practical choice for sidewalk roofs.

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24. Use to connect G.I. roofing to steel purlin?

Explanation

Self-tapping screws are commonly used to connect G.I. roofing to steel purlins because they have a sharp, pointed end that can easily penetrate and create its own thread in the steel. This eliminates the need for pre-drilling holes and makes the installation process faster and more efficient. Additionally, self-tapping screws provide a secure and reliable connection between the roofing and purlin, ensuring that they stay firmly in place even under harsh weather conditions.

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25. What type of roofing is ideal for a busy airport?

Explanation

A GI roof with double bubble foil insulation is ideal for a busy airport because it is durable, low-maintenance, and provides excellent insulation. The GI roof is made of galvanized iron, which is resistant to corrosion and can withstand heavy foot traffic and extreme weather conditions. The double bubble foil insulation adds an extra layer of thermal protection, helping to regulate temperature and reduce energy costs. This type of roofing is also lightweight, making it easier to install and transport materials to the airport. Overall, the GI roof with double bubble foil insulation is the best choice for a busy airport due to its durability, insulation properties, and low maintenance requirements.

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26. Aside from roofing for polycarbonate, what's the other common use?

Explanation

Polycarbonate is a versatile material that is commonly used for various applications due to its durability and transparency. While it is commonly used for roofing, it is also frequently used as a partition panel. Partition panels made from polycarbonate provide a modern and sleek look while creating separate spaces within a larger area. They are often used in offices, commercial buildings, and even residential spaces to create privacy and divide different areas without completely blocking off the light.

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27. Which is not part of the truss system?

Explanation

A girt is not part of the truss system. Trusses are structural frameworks made of beams or bars that are connected to form triangular shapes. They are commonly used in construction to support roofs, bridges, and other structures. The girder, top chord, and purlins are all components of a truss system. However, a girt is a horizontal structural member that is typically used in the construction of walls, not trusses. It is usually located at the mid-height of the wall and provides additional support and stability.

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28. What type of roofing is ideal for structures near the sea?

Explanation

Asphalt roofing is ideal for structures near the sea because it is highly resistant to saltwater corrosion and can withstand the harsh coastal environment. The asphalt material provides excellent protection against moisture, wind, and UV rays, making it a durable and long-lasting option for coastal areas. Additionally, asphalt roofing is also known for its ability to resist algae and moss growth, which can be common in humid coastal climates.

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29. Which is not part of the truss system?

Explanation

A girder, top chord, and purlin are all components of a truss system. However, a girt is not part of the truss system. A girt is a horizontal structural member that is typically used to support the exterior walls of a building. While it may be used in conjunction with a truss system, it is not considered a part of the truss itself.

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30. What kind of roofing is made of thermoplastic material and has strips which under the suns heat will melt and cause it to bind as one roof?

Explanation

Asphalt shingles are made of thermoplastic material and have strips that, when exposed to the sun's heat, will melt and bind the shingles together, creating a solid roof. This characteristic allows the shingles to effectively protect the building from water and other elements.

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31. What type of roofing is ideal for industrial plant where toxic fumes are emitted?

Explanation

Corrugated GI sheet is the ideal type of roofing for an industrial plant where toxic fumes are emitted because it is durable, resistant to chemicals, and has excellent ventilation properties. The corrugated design allows for better airflow, which helps in dispersing the toxic fumes and preventing any buildup of harmful gases. Additionally, GI (galvanized iron) sheet is known for its strength and corrosion resistance, making it suitable for industrial environments.

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32. Identify the figure shown above?

Explanation

The figure shown above is a valley gutter.

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33. What is galvanized roofing?

Explanation

Galvanized roofing refers to a roofing material that has been coated with zinc on all sides. This zinc coating provides protection against corrosion and extends the lifespan of the roofing material. By coating the roofing on all sides, it ensures that all surfaces are protected from moisture, rust, and other damaging elements. This makes galvanized roofing a durable and reliable option for various construction projects.

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34. Water proofing can be rendered ineffective or damaged by what factor?

Explanation

Waterproofing is a protective coating or treatment that prevents water from penetrating a surface. However, it can be rendered ineffective or damaged when it comes into direct contact with acids and alkali. These substances have corrosive properties that can break down the waterproofing material, compromising its ability to keep water out. Therefore, acids and alkali transmitted by direct contact can undermine the effectiveness of waterproofing. Moisture, temperature, and applying waterproofing to a wet surface may affect its performance but are not specifically mentioned as factors that can render it ineffective or damaged.

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35. Rubber washer on tekscrew used for steel purlins?

Explanation

Neoprene is the correct answer because it is a type of synthetic rubber that is commonly used for rubber washers on tekscrews used for steel purlins. Neoprene is known for its excellent resistance to weather, ozone, oil, and chemicals, making it a suitable material for sealing applications. It provides a tight seal between the tekscrew and the steel purlin, preventing water or other substances from penetrating the connection point.

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36. A right angled notch cut on the underside of a rafter to fit over a longitudinal member?

Explanation

A bird's mouth is a right angled notch cut on the underside of a rafter to fit over a longitudinal member. This type of cut allows the rafter to securely connect with the longitudinal member, providing stability and support to the structure. The bird's mouth cut is commonly used in construction to create a strong joint between the rafter and the longitudinal member, ensuring the structural integrity of the building.

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37. What material is used for purlins for GI roofing?

Explanation

Light gauge metal channel is used for purlins for GI roofing. Purlins are horizontal structural members that provide support for the roof deck and help to distribute the weight of the roof covering evenly. Light gauge metal channel is a common choice for purlins as it is lightweight, strong, and resistant to corrosion. It is also easy to install and cost-effective. Therefore, light gauge metal channel is the preferred material for purlins in GI roofing.

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38. A beam for supporting the upper ends of rafters at the ridge of a roof?

Explanation

A ridge beam is a horizontal beam that runs along the top of the rafters at the ridge of a roof. Its purpose is to provide support and stability to the upper ends of the rafters, ensuring that they are held in place and can withstand the weight and pressure of the roof. The ridge beam helps to distribute the load evenly across the rafters, preventing any sagging or structural issues in the roof. It plays a crucial role in maintaining the integrity and strength of the roof structure.

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39. What is the ideal way of insulating the roof?

Explanation

The ideal way of insulating the roof is by having a roofing sheet, followed by an air space or gap, and then aluminum insulation. This arrangement helps to create a barrier between the roof and the interior of the building, preventing heat transfer and improving energy efficiency. The air space or gap acts as a buffer, reducing the direct contact between the roofing sheet and the insulation, which can enhance the insulation's effectiveness. The aluminum insulation provides an additional layer of thermal protection, reflecting heat away from the roof and keeping the interior cooler.

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40. Water proofing on roof deck fails and there is seepage. What s not the reason it failed?

Explanation

The reason the water proofing on the roof deck failed is not because it melts in the rain. Melting in the rain is not a factor that contributes to the failure of water proofing. The other options, such as corners not being properly sealed, lack of proper protection by flashing, and installation defects, are more likely reasons for the failure.

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41. Gutter and roof accessories are?

Explanation

Gutter and roof accessories are thicker than the roof because they are designed to provide additional support and protection to the roof. These accessories, such as gutters, downspouts, and flashing, are typically made from durable materials like metal or PVC, which need to be thicker in order to withstand the elements and prevent leaks or damage. The roof itself may have different layers or materials, but the accessories are specifically designed to be thicker to ensure their functionality and longevity.

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42. What type of roof is ideal for green house?

Explanation

Polycarbonate is the ideal type of roof for a greenhouse because it allows maximum sunlight penetration while providing insulation and durability. Polycarbonate roofs are lightweight, UV resistant, and have excellent thermal properties, creating a controlled environment for plants to thrive. The material also offers high impact resistance and is easy to install and maintain. Additionally, polycarbonate roofs are cost-effective and can be customized to fit different greenhouse designs and sizes.

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43. Minimum side lapping for corrugated GI roofing?

Explanation

The minimum side lapping for corrugated GI roofing is 1 1/2". This means that when installing the roofing sheets, each sheet should overlap the adjacent sheet by at least 1 1/2" on the sides. This is important to ensure proper water drainage and prevent leaks.

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44. A roofing tile having an "S"-shaped cross section, laid so the downturn of one overlaps the upturn of the next in the same course?

Explanation

A pantile is a roofing tile with an "S"-shaped cross section, where the downturn of one tile overlaps the upturn of the next tile in the same course. This design allows for better water drainage and prevents water from seeping through the roof. The term "pantile" is commonly used to describe this type of roofing tile.

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45. Minimum end lapping for corrugated GI roofing?

Explanation

The minimum end lapping for corrugated GI roofing is 30 cm. This means that when installing the roofing sheets, the end of one sheet should overlap the end of the adjacent sheet by at least 30 cm. This helps to ensure a secure and watertight connection between the sheets, preventing any leakage or damage from occurring.

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46. Used to hold horizontal batten on top of corrugated sheathing?

Explanation

A batten nail is used to hold a horizontal batten on top of corrugated sheathing. The batten nail is specifically designed to secure the batten, which is a thin strip of material, to the corrugated G.I. sheet. This helps to provide stability and support to the sheathing, ensuring that it remains securely in place. The other options, such as the corrugated G.I. sheet, vertical batten, and bead, are not specifically used for holding the horizontal batten on top of the sheathing.

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47. What type of roofing is ideal for houses located at coastal area?

Explanation

Clay tile is the ideal roofing option for houses located at coastal areas. This is because clay tiles are highly durable and resistant to the harsh coastal climate, including strong winds, saltwater, and humidity. Clay tiles also have excellent thermal insulation properties, which help to keep the house cool in hot coastal environments. Additionally, clay tiles have a long lifespan and require minimal maintenance, making them a practical choice for coastal homes.

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48. What type of nails is use for asphalt shingles?

Explanation

Staple wires are the type of nails used for asphalt shingles. They are commonly used because they provide a secure and long-lasting attachment to the shingles. Staple wires are designed to penetrate the asphalt shingles and hold them in place, ensuring that they do not lift or become loose over time. This type of nail is specifically designed for use with asphalt shingles and is the preferred choice for roofing installations.

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49. Best waterproofing for balconies, roof deck and basement?

Explanation

A 3/16" thick membrane is the best option for waterproofing balconies, roof decks, and basements. This thicker membrane provides more durability and protection against water penetration compared to the other options listed. It is able to withstand potential wear and tear, as well as resist water pressure effectively. This makes it an ideal choice for areas that are prone to moisture and potential water damage.

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50. What is used for aluminum roofing consisting a pin head and a long shank?

Explanation

A blind rivet is used for aluminum roofing and consists of a pin head and a long shank. It is a type of fastener that is inserted into pre-drilled holes and then secured by pulling the pin, which causes the shank to expand and create a tight connection. This type of rivet is commonly used in construction and manufacturing industries for joining materials together in a secure and efficient manner.

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51. In waterproofing, if the horizontal meets the vertical, _____?

Explanation

In waterproofing, when the horizontal meets the vertical, a cant is provided. A cant is a sloping surface or angle that is created at the junction where the horizontal and vertical surfaces meet. This sloping surface helps to direct water away from the joint, preventing water infiltration and potential damage to the structure. By providing a cant, water is effectively diverted and the waterproofing system is able to function properly.

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52. A short wall supporting rafters a some intermediate position along their length?

Explanation

A knee wall is a short wall that supports rafters at an intermediate position along their length. It is typically used to provide additional support and stability to the rafters and can be found in various structures such as attics or loft spaces. Knee walls are often built perpendicular to the rafters and can help to distribute the weight and load more evenly, preventing sagging or structural issues.

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53. What is the Sydney Opera House "shell" made of?

Explanation

The Sydney Opera House "shell" is made of pre-cast concrete panels.

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54. A jack rafter extending from valley rafter to a ridge?

Explanation

A valley jack is a type of rafter that extends from a valley rafter to a ridge. It provides support and stability to the roof structure, particularly in areas where two roof planes meet at a valley. The valley jack helps to distribute the weight of the roof evenly and prevents sagging or collapsing.

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55. A tapered, semi-cylinder roofing tile laid convex side up to overlap planking, similar tiles laid concave side up?

Explanation

A mission tile is a type of roofing tile that is tapered and semi-cylindrical in shape. It is laid with the convex side facing up to overlap the planking. The similar tiles are laid concave side up. This type of tile is commonly used in mission-style architecture and provides a visually appealing and functional roofing solution.

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56. What type of roofing is oven baked and is water proof?

Explanation

Tegula is the correct answer because it is a type of roofing that is oven baked and waterproof. Tegula roofs are made from clay or concrete tiles that are fired in a kiln, making them durable and resistant to water. This type of roofing is commonly used in Mediterranean and Spanish-style architecture.

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57. Common water proofing for roof deck?

Explanation

Elastomeric is the correct answer because it is a common waterproofing material used for roof decks. Elastomeric coatings are flexible and can expand and contract with the movement of the roof, making them ideal for areas that experience temperature changes and structural movement. These coatings create a seamless, waterproof barrier that protects the roof deck from water damage and leaks.

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58. What area is not recommended to use for capillary membrane waterproofing?

Explanation

Escalator and elevator pits are not recommended for capillary membrane waterproofing because these areas are constantly exposed to mechanical stress and movement. The constant movement of the escalators and elevators can cause the waterproofing membrane to crack or deteriorate, leading to water leakage and damage. Therefore, it is not advisable to use capillary membrane waterproofing in these areas to ensure the longevity and effectiveness of the waterproofing system.

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59. What is used to support purlins on a wooden roof frame?

Explanation

A rafter is a structural member that is used to support purlins on a wooden roof frame. Purlins are horizontal beams that are placed perpendicular to the rafters and provide support for the roof covering. The rafters are typically sloped and run from the ridge of the roof down to the eaves, supporting the weight of the roof and transferring it to the walls or other supporting structures. Therefore, the correct answer is rafter.

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60. What is the commercial length of a long span roofing?

Explanation

The question asks for the commercial length of a long span roofing. However, none of the given options provide a specific length for the commercial length of a long span roofing. Therefore, the correct answer is "none" as there is no option that accurately represents the commercial length of a long span roofing.

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61. Roofing material use for skylights?

Explanation

Laminated glass is the correct answer for roofing material used for skylights. Skylights are windows installed in the roof to allow natural light to enter a building. Laminated glass is a type of safety glass that is made by sandwiching a layer of polyvinyl butyral (PVB) between two layers of glass. This process makes the glass less likely to shatter when broken, providing added safety. Laminated glass is also known for its durability and ability to withstand harsh weather conditions, making it an ideal choice for skylights.

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62. What is the standard width of a corrugated GI sheet?

Explanation

The standard width of a corrugated GI sheet is 80.

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63. Stiffener provided between a span of two bottom chords?

Explanation

Bridging is the correct answer because it refers to a structural component that is used to connect and support the bottom chords of a span. It helps to distribute the load evenly and prevent any sagging or deflection in the structure. Cross bracing, box strut, and none are not suitable options as they do not specifically address the purpose of providing support between the bottom chords.

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64. A rafter, either of the end rafters in the part of a gable roof that projects beyond the gable wall?

Explanation

The correct answer is "outrigger". An outrigger is a rafter that extends beyond the gable wall in a gable roof. It helps to support the overhang of the roof and provides additional stability to the structure. A dragon tie is a type of timber connector, not related to rafters. A fly is a term used in theater for a piece of fabric that hangs above the stage. A lookout is a person who keeps watch or observes something.

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65. An "L" Shaped roofing tile for covering the ridge, hip, or rake of a roof?

Explanation

An "L" shaped roofing tile is used to cover the ridge, hip, or rake of a roof. The term "arris" refers to the sharp edge or ridge formed by the intersection of two surfaces of the tile. Therefore, an arris tile would be the correct choice for covering the ridge, hip, or rake of a roof.

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66. A part of sheet of metal roofing that laps over a sheet beneath it at a drip or seam?

Explanation

An overcloak is a part of a sheet of metal roofing that laps over a sheet beneath it at a drip or seam. It provides an additional layer of protection against water leakage by covering the joint between two sheets of roofing. This helps to prevent water from seeping through the seam and causing damage to the underlying structure.

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67. A kind of roof that has four sloping sides?

Explanation

A mansard roof is a type of roof that has four sloping sides. It is characterized by two slopes on each side, with the lower slope being steeper than the upper slope. This design allows for more living space in the attic or upper floors of a building. The steep lower slope also provides a distinctive aesthetic appeal to the roof.

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68. What is the ideal roofing for a "bungalow house" which is located between two story houses?

Explanation

The ideal roofing for a bungalow house located between two-story houses would be roof tiles. Roof tiles are a popular choice for bungalow houses as they provide a durable and aesthetically pleasing option. They offer good insulation, are resistant to fire and extreme weather conditions, and can complement the architectural style of the house. Additionally, roof tiles are available in various colors and designs, allowing homeowners to customize the look of their roof to match the surrounding houses.

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69. Which among the given is the best insulating material?

Explanation

Kraft paper is the best insulating material among the given options. Kraft paper is a type of paper that is made from wood pulp, and it has a high resistance to heat transfer. It is commonly used as an insulating material in various applications due to its ability to trap air and prevent heat from passing through. Additionally, kraft paper is also known for its durability and strength, making it an ideal choice for insulation purposes.

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70. A structural member spanning from truss-to-truss or supporting rafters?

Explanation

A girder is a structural member that spans from truss-to-truss or supports rafters. It is designed to carry heavy loads and provide support to the structure. Unlike floor joists, which support the floor above, a girder is typically larger and stronger, capable of handling greater loads. Purlins are horizontal beams that support the roof, while girts are horizontal beams that support the walls. Therefore, the correct answer for a structural member spanning from truss-to-truss or supporting rafters is a girder.

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71. What is the horizontal brace between two queen post?

Explanation

A queen post is a supporting post designed to span longer openings than a king post. A king post uses one central supporting post, whereas the queen post uses two.

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72. What is the smallest gutter size?

Explanation

The correct answer is 6". This is because the question is asking for the smallest gutter size, and out of the options provided, 6" is the smallest.

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73. Using 12 feet G.I. Corrugated roofing sheet, what is the distance of the purlins?

Explanation

The distance of the purlins is 660 mm. This can be determined by dividing the length of the G.I. corrugated roofing sheet (12 feet) by the number of purlins required. In this case, the purlins are spaced at a distance of 660 mm apart.

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74. A strip of wood fixed to each rafter at the eaves in order to extend a sloping roof with a flatter pitch?

Explanation

A sprocket is a strip of wood that is fixed to each rafter at the eaves to extend a sloping roof with a flatter pitch. It helps to create a smooth transition between the sloping roof and the eaves, allowing for a more aesthetically pleasing and functional design. The sprocket acts as an extension of the rafters, providing support and stability to the roof structure.

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75. A rafter joining a hip to a valley?

Explanation

A cripple jack is a type of rafter that is used to join a hip to a valley. It provides additional support and stability to the structure by connecting these two important components. The cripple jack helps to distribute the weight and load evenly, ensuring that the roof structure remains strong and secure.

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