Mixed Questions For Heat, Space & Distance Final Exam
- 1.
The heat necessary for a change of state from water or ice to vapor is known as...
- A.
Condensation heat
- B.
Sublimation heat
- C.
Latent heat
- D.
Sensible hear
Correct Answer
C. Latent heatExplanation
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.Rate this question:
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- 2.
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..
- A.
Sensible heat
- B.
Relative humidity
- C.
Latent heat
- D.
Effective temperature
Correct Answer
B. Relative humidityExplanation
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.Rate this question:
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- 3.
Can warmer air hold more or less water vapor than colder air or does it make any difference?
- A.
Warmer air holds more water than colder air
- B.
Warmer air holds less water vapor than colder air
- C.
The amount of water vapor that air can hold is not related to air temperature
Correct Answer
A. Warmer air holds more water than colder airExplanation
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.Rate this question:
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- 4.
What is the maximum permeance rating that, by traditional definition, a material can have and be called a vapor retarder?
- A.
1 perm
- B.
10 perms
- C.
50 perms
- D.
100 perms
Correct Answer
A. 1 permExplanation
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.Rate this question:
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- 5.
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?
- A.
2
- B.
5
- C.
10
- D.
100
Correct Answer
B. 5Explanation
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.Rate this question:
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- 6.
In a building (heated in the winter), on which side of the insulation should the vapor retarder be placed?
- A.
The cold side (winter)
- B.
The warm side (winter)
- C.
Both sides
- D.
Either sides
Correct Answer
C. Both sidesExplanation
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.Rate this question:
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- 7.
The key characteristic of betonite clay that makes it a viable waterproofing is that it..
- A.
Expands when wet
- B.
Sets under water
- C.
Adheres to vertical surfaces
- D.
Resists abrasion
Correct Answer
A. Expands when wetExplanation
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.Rate this question:
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- 8.
One type of cementitious waterproofing contains Portland cement, aggregate, a plastic admixture, and...
- A.
Cellulose
- B.
Pulverized iron
- C.
Gypsum
- D.
Bitumen
Correct Answer
B. Pulverized ironExplanation
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.Rate this question:
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- 9.
Which system of dampproofing is typically used on either the interior or exterior of buildings?
- A.
Hot applied bituminous dampproofing
- B.
Coal-tar based dampproofing
- C.
Asphalt based cold-applied bituminous dampproofing
Correct Answer
C. AspHalt based cold-applied bituminous dampproofingExplanation
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.Rate this question:
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- 10.
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)
- A.
10
- B.
13
- C.
16
- D.
19
Correct Answer
B. 13Explanation
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.Rate this question:
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- 11.
Which material listed is the best insulator?
- A.
Extruded polystyrene
- B.
Molded polystyrene
- C.
Polyurethane
- D.
Polyisocyanurate
Correct Answer
C. PolyurethaneExplanation
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.Rate this question:
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- 12.
Which insulator is reported to corrode metal?
- A.
Polyisocyanutate
- B.
Perlite
- C.
Phenolic
- D.
Vermiculite
Correct Answer
C. pHenolicExplanation
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.Rate this question:
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- 13.
Rigid glass fiber board insulation is used primarily for...
- A.
Roofing systems
- B.
Walls above grade
- C.
Walls below grade
- D.
Foundation perimeters
Correct Answer
A. Roofing systemsExplanation
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.Rate this question:
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- 14.
The method of securing insulation within a framed wall known as "friction-fit" is available in what form of insulation product?
- A.
Rigid boards
- B.
Semi-rigid boards
- C.
Loose fill
- D.
Batts and blankets
Correct Answer
D. Batts and blanketsExplanation
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.Rate this question:
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- 15.
Most loose fill insulations in use today in attics and walls is manufactured from, among other raw materials...
- A.
Polystyrene granules
- B.
Mineral wool
- C.
Phenolic fibers
- D.
Gypsum wool
Correct Answer
B. Mineral woolExplanation
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.Rate this question:
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- 16.
Foamed in place insulations are, among other materials made of...
- A.
Polyurethane
- B.
Polystyrene
- C.
Glass
- D.
Cellulose
Correct Answer
B. PolystyreneExplanation
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.Rate this question:
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- 17.
Which insulating product requires an adjacent air space with a minimum dimension of 3/4 inch?
- A.
Polystyrene
- B.
Phenolic
- C.
Metallic foil
- D.
Vermiculite
Correct Answer
C. Metallic foilExplanation
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.Rate this question:
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- 18.
Why should gypsum board be attached to furring instead of glued to plastic foam board insulation?
- A.
Adhesives lack the strength necessary to secure the heavy gypsum board
- B.
Plastic foam board insulation lacks the strength necessary to hold the weight of the gypsum board
- C.
The cost of the large amount of adhesive necessary to secure the gypsum board is prohibitive
- D.
The heat from a fire could melt the plastic permitting the gypsum board to fall off
Correct Answer
D. The heat from a fire could melt the plastic permitting the gypsum board to fall offExplanation
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.Rate this question:
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- 19.
Which insulation is used most in the PB EIFS?
- A.
Polyurethane
- B.
Phenolic
- C.
Molded polystyrene
- D.
Extruded polystyrene
Correct Answer
C. Molded polystyreneExplanation
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.Rate this question:
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- 20.
The superior roofing material for built up roofing applications is...
- A.
Asphalt
- B.
Creosote
- C.
Crude oil
- D.
Coal tar
Correct Answer
D. Coal tarExplanation
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.Rate this question:
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- 21.
The roof underlayment for a shingled rood..
- A.
Should not be vapor retarder
- B.
Should be a vapor retarder
Correct Answer
A. Should not be vapor retarderExplanation
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.Rate this question:
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- 22.
What is the minimum board size and maximum span of the board sheathing which supports clay or concrete roofing tile?
- A.
1 x 4 spanning 16 inches
- B.
1 x 4 spanning 24 inches
- C.
1 x 6 spanning 16 inches
- D.
1 x 6 spanning 24 inches
Correct Answer
D. 1 x 6 spanning 24 inchesExplanation
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.Rate this question:
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- 23.
The best or premium grade of wood shingle is...
- A.
Black label
- B.
Red label
- C.
Blue label
- D.
Gold label
Correct Answer
C. Blue labelExplanation
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.Rate this question:
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- 24.
What is the recommended practice regarding building paper, board sheathing, and wood shingles on walls?
- A.
Building paper is not used
- B.
Building paper is applied to the framing (under the sheathing)
- C.
Building paper is applied to the face of the sheathing
Correct Answer
C. Building paper is applied to the face of the sheathingExplanation
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.Rate this question:
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- 25.
Which membrane roofing can be installed in the wider range of temperatures?
- A.
A single ply roofing
- B.
Built up bituminous
Correct Answer
A. A single ply roofingExplanation
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.Rate this question:
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- 26.
What practice is recommended when installing hot-applied built-up roofing over polyisocyanurate, polyurethane, and phenolic foam insulations
- A.
The temperature of the built up roofing components should be above its flash point temperature
- B.
The temperature of the built up roofing components should be below its equiviscous temperature
- C.
Hot applied built up roofing cannot be installed over polyisoocyanurate, polyurethane, and phenolic foam insulations
- D.
A layer of wood fiber, perlite, or glass fiber board insulation must be placed between these plastic insulations and the hot roofing
Correct Answer
D. A layer of wood fiber, perlite, or glass fiber board insulation must be placed between these plastic insulations and the hot roofingExplanation
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.Rate this question:
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- 27.
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.
- A.
Bitumen type, surfacing type, ply felt type, insulation type
- B.
Isulation type, deck type, bitumen type, surfacing type
- C.
Surfacing type, ply felt type, insulation type, deck type
- D.
Deck type, bitumen type, surfacing type, plies felt type
Correct Answer
D. Deck type, bitumen type, surfacing type, plies felt type -
- 28.
How many plies are there in normal built-up roof systems for commercial projects?
- A.
One or two
- B.
Two or three
- C.
Three or four
- D.
Four or five
Correct Answer
C. Three or fourExplanation
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.Rate this question:
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- 29.
When should single-ply roofing not be mechanically fastened to the decking?
- A.
When a vapor retarder is required
- B.
When the roof slopes
- C.
When the decking steel
- D.
When economy is important
Correct Answer
A. When a vapor retarder is requiredExplanation
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.Rate this question:
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- 30.
What is the substance of common plastic siding?
- A.
Polyvinyl chloride
- B.
Polyvinyl butyl
- C.
Polypropylene
- D.
Polyester
Correct Answer
A. Polyvinyl chlorideExplanation
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.Rate this question:
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- 31.
The metal materials generally used as flashing for walls and roofs include...
- A.
Tin, copper, lead, galvanized steel, aluminum
- B.
Copper, lead, galvanized steel, aluminum, stainless steel
- C.
Lead, galvanized steel, aluminum, stainless steel, zinc
- D.
Aluminum, copper, tin, zinc, galvanized steel
Correct Answer
B. Copper, lead, galvanized steel, aluminum, stainless steelExplanation
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.Rate this question:
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- 32.
Which material is recommended for use in contact with masonry mortar?
- A.
Aluminum
- B.
Copper
- C.
Tin
- D.
Galvanized steel
Correct Answer
B. CopperExplanation
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.Rate this question:
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- 33.
A coping is located..
- A.
At the bottom of a window
- B.
On either side of a door
- C.
At the top of the foundation
- D.
At the top of a parapet
Correct Answer
D. At the top of a parapetExplanation
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.Rate this question:
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- 34.
Scuppers are..
- A.
Outlets through a parapet or gravel stop that permit water to flow from a roof
- B.
Caps on top a parapet to prevent the penetration of water
- C.
Expansion joints in a roof which are built up a minimum of 8 inches to prevent penetration of water
- D.
The sheet metal sealing the opening around any pipe or structural member which penetrates the roof
Correct Answer
A. Outlets through a parapet or gravel stop that permit water to flow from a roofExplanation
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.Rate this question:
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- 35.
Tape sealants are often used with..
- A.
Stone
- B.
Aluminum panels
- C.
Glazing
- D.
Horizontal joints
Correct Answer
C. GlazingExplanation
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.Rate this question:
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- 36.
The exposed surface of oil-based caulking compounds...
- A.
Remains soft while the interior of the substance hardens with age
- B.
Should not be painted
- C.
Should be painted each time the adjacent wall is painted
- D.
Expands and contracts to a greater degree than most other sealants
Correct Answer
C. Should be painted each time the adjacent wall is paintedExplanation
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.Rate this question:
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- 37.
What relationship should sealants have to the substance in the back of the joint sealed?
- A.
The sealants should be secured to the back substrate during application
- B.
The sealant should be secured to the back substrate for elastomeric sealants but should not adhere to the back of the joint when other substances are used
- C.
The sealant should not be adhered to the back substrate
- D.
The sealant can either adhere or be separated from the back of the joint
Correct Answer
C. The sealant should not be adhered to the back substrateExplanation
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.Rate this question:
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- 38.
Which National Fire Protection document identifies the various components of fire safety and shows their relationship to each other
- A.
NFPA 13
- B.
NFPA 70
- C.
NFPA 72
- D.
NFPA 550
Correct Answer
D. NFPA 550Explanation
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.Rate this question:
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- 39.
What is the minimum distance from a building that shrubs and trees should be planted where bush fires are a threat?
- A.
10 feet
- B.
30 feet
- C.
50 feet
- D.
100 feet
Correct Answer
B. 30 feetExplanation
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.Rate this question:
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- 40.
What dimensions between sheets of glass is most effective in stopping the transfer of heat?
- A.
1/16 to 5/16 inch
- B.
3/16 to 5/8 inch
- C.
1/2 to 1 inch
- D.
3/4 to 1-1/2 inch
Correct Answer
B. 3/16 to 5/8 inchExplanation
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.Rate this question:
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- 41.
Identify a disadvantage of insulating glass compared to storm sash?
- A.
Insulating glass does not provide the added protection against infiltration that storm sash does
- B.
Insulating glass does not reduce conductive heat flow like storm sash
- C.
Insulating glass does not control condensation as well as storm sash
- D.
Insulating glass is not part of the prime window or door like storm sash is
Correct Answer
A. Insulating glass does not provide the added protection against infiltration that storm sash doesExplanation
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.Rate this question:
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- 42.
What is a disadvantage of acrylic and polycarbonate when used as glazing compared to glass?
- A.
They lack the resistance to breakage necessary for security
- B.
They lack the degree of transparency necessary for vision
- C.
They are too heavy for operable windows of standard size
- D.
They are subject to surface scratches
Correct Answer
D. They are subject to surface scratchesExplanation
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.Rate this question:
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- 43.
Most exposed portions of aluminum entrance doors are...
- A.
Painted
- B.
Anodized
- C.
Mill finished
- D.
Galvanized
Correct Answer
B. AnodizedExplanation
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.Rate this question:
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- 44.
What is the most common method for shaping typical carbon steel door frames?
- A.
Brake-forming
- B.
Hot rolling
- C.
Cold rolling
- D.
Extrusion
Correct Answer
A. Brake-formingExplanation
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.Rate this question:
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- 45.
Most main entrance doors and their frames, and packaged entrances and store fronts in commercial and institutional buildings are made from..
- A.
Hot rolled steel
- B.
Extruded aluminum
- C.
Cold rolled aluminum
- D.
Extruded steel
Correct Answer
B. Extruded aluminumExplanation
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.Rate this question:
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- 46.
Which type of metal door frame should not be filled with mortar when installed in a masonary wall?
- A.
Carbon steel
- B.
Stainless steel
- C.
Copper-alloy
Correct Answer
C. Copper-alloyExplanation
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.Rate this question:
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- 47.
Most wood doors today are...
- A.
Panel doors
- B.
Louvered doors
- C.
Sash doors
- D.
Flush doors
Correct Answer
D. Flush doorsExplanation
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.Rate this question:
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- 48.
Glazing in doors is required to be...
- A.
Plastic glazing
- B.
Wired glazing
- C.
Safety glazing
- D.
Laminated glazing
Correct Answer
C. Safety glazingExplanation
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.Rate this question:
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- 49.
For flush doors, industry standards limit the size of the cutout for glazing or louvers to a maximum of what percent of the door?
- A.
10 percent
- B.
20 percent
- C.
40 percent
- D.
60 percent
Correct Answer
C. 40 percentExplanation
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.Rate this question:
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- 50.
Most solid core doors have what kind of core?
- A.
Framed block core
- B.
Glued block core
- C.
Stile and rail core
- D.
Particleboard core
Correct Answer
B. Glued block coreExplanation
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.Rate this question:
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Mar 19, 2023Quiz Edited by
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Dec 02, 2010Quiz Created by
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