Final Exam Part 2
Chapter 9: Finishes
- 1.
Plaster of Paris is..
- A.
A mixture of portland cement and water
- B.
A compound of silica and calcium sulfate
- C.
Relatively pure calcined gypsum
- D.
Vitrified sodium sulfate
Correct Answer
C. Relatively pure calcined gypsumExplanation
Plaster of Paris is a type of gypsum that has been heated and then ground into a fine powder. It is called "relatively pure" because it is not mixed with any other substances or impurities. Calcined gypsum refers to the process of heating the gypsum to a high temperature to remove water molecules and create a dry powder. Therefore, the correct answer is "relatively pure calcined gypsum."Rate this question:
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- 2.
What is released into the atmosphere when gypsum is heated?
- A.
Oxygen
- B.
Carbon dioxide
- C.
Water
- D.
Carbon monoxide
Correct Answer
C. WaterExplanation
When gypsum is heated, it undergoes a process called calcination, where it loses its water of crystallization. This means that the water molecules that are chemically bound within the gypsum structure are released as water vapor into the atmosphere. Therefore, the correct answer is water.Rate this question:
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- 3.
What is the key benefit of using gypsum products in construction?
- A.
It provides fire protection
- B.
It provides structural stability
- C.
It provides protection from corrosion and decay
- D.
It provides security against vandalism
Correct Answer
A. It provides fire protectionExplanation
Gypsum products are beneficial in construction because they provide fire protection. Gypsum is a non-combustible material that helps to prevent the spread of fire. When exposed to high temperatures, gypsum releases water vapor, which helps to keep the temperature of the surrounding area low and slows down the spread of flames. This makes gypsum products an essential component in fire-resistant walls, ceilings, and partitions, ensuring the safety of the building and its occupants in case of a fire.Rate this question:
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- 4.
What is the role of aggregates in plaster?
- A.
To provide weight
- B.
To increase workability
- C.
To increase water tightness
- D.
To provide dimensional stability
Correct Answer
D. To provide dimensional stabilityExplanation
Aggregates in plaster play a crucial role in providing dimensional stability. They help to prevent shrinkage and cracking by adding strength and stability to the plaster mixture. By filling the gaps between the binding materials, aggregates ensure that the plaster remains intact and does not deform or change shape over time. This is especially important in situations where the plaster needs to withstand external forces or temperature changes. Therefore, the presence of aggregates in plaster is essential for maintaining its structural integrity and preventing any potential damage.Rate this question:
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- 5.
Which substance is added to finish coat plasters to improve workability?
- A.
Lime
- B.
Aggregate
- C.
Calcium chloride
- D.
Resin
Correct Answer
A. LimeExplanation
Lime is added to finish coat plasters to improve workability. Lime acts as a plasticizer, making the plaster more flexible and easier to work with. It also helps to reduce cracking and improve the overall durability of the plaster. Additionally, lime enhances the adhesive properties of the plaster, allowing it to bond better to the substrate.Rate this question:
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- 6.
What is the principle cementitious ingredient in stucco?
- A.
Gypsum
- B.
Portland cement
- C.
Acrylic
- D.
Lime
Correct Answer
B. Portland cementExplanation
Portland cement is the principle cementitious ingredient in stucco. Stucco is a type of plaster that is commonly used for exterior wall finishes. It is a mixture of cement, sand, and water, with cement being the main binding agent. Portland cement is a type of hydraulic cement that hardens when mixed with water, forming a strong and durable material. It is widely used in construction due to its ability to bond with other materials and its resistance to moisture and various weather conditions.Rate this question:
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- 7.
Vermiculite is...
- A.
An agent which retards the setting of plaster
- B.
A light weight aggregate for plaster
- C.
An agent which speeds the setting of plaster
- D.
An additive designed to increase the workability of plaster
Correct Answer
B. A light weight aggregate for plasterExplanation
Vermiculite is a light weight aggregate for plaster. This means that it is used as a material that is added to plaster to make it lighter in weight. This can be beneficial in certain applications where a lighter plaster is desired, such as for insulation or to reduce the load on a structure. Vermiculite is often preferred over other aggregates because it is lightweight and has good insulating properties.Rate this question:
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- 8.
Which product(s) cannot be applied directly to gypsum plaster, gypsum masonry, or gypsum lath?
- A.
Gypsum plaster cannot be applied to these bases
- B.
Portland cement plaster cannot be applied directly to these bases
- C.
Neither gypsum plaster nor portland cement plaster can be applied directly to these bases
- D.
Neither gypsum plaster nor portland cement plaster are restricted from direct application to these bases
Correct Answer
B. Portland cement plaster cannot be applied directly to these basesExplanation
The correct answer is "portland cement plaster cannot be applied directly to these bases." This means that portland cement plaster cannot be directly applied to gypsum plaster, gypsum masonry, or gypsum lath.Rate this question:
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- 9.
What restriction applied when plaster is to be applied directly to concrete surface?
- A.
The surface of the concrete should not be sandblasted
- B.
Rough lumber should not be used as forms for the concrete
- C.
Form release oil should not be used on the formwork
- D.
Muriatic acid should not be applied to the concrete
Correct Answer
C. Form release oil should not be used on the formworkExplanation
When plaster is applied directly to a concrete surface, it is important not to use form release oil on the formwork. Form release oil is a substance that is applied to the forms to prevent the concrete from sticking to them. However, if form release oil is used and comes into contact with the concrete surface, it can create a barrier that prevents the plaster from properly adhering to the concrete. This can result in poor adhesion and a weak bond between the plaster and the concrete surface. Therefore, to ensure a strong and durable bond, it is necessary to avoid using form release oil on the formwork.Rate this question:
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- 10.
Identify the coats of three-coat plaster work as applied to metal lath.
- A.
Dash coat, gray coat, finish coat
- B.
Scratch coat, gray coat, white coat
- C.
Scratch coat, brown coat, finish coat
- D.
Dash coat, brown coat, finish coat
Correct Answer
C. Scratch coat, brown coat, finish coatExplanation
The correct answer is "scratch coat, brown coat, finish coat." In three-coat plaster work applied to metal lath, the first coat is the scratch coat, which is a rough layer that provides a base for the subsequent coats. The second coat is the brown coat, which is a thicker layer that helps to level and smooth the surface. The final coat is the finish coat, which is a thin layer that provides the desired texture and appearance. Therefore, the coats in the correct order are scratch coat, brown coat, and finish coat.Rate this question:
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- 11.
Which adjustments are allowed to a mix of portland cement plaster within three and one-half hours of the initial mixing?
- A.
Retempering with additional water
- B.
Remixing to restore plasticity
- C.
Both retempering and remixing
- D.
Neither retempering nor remixing
Correct Answer
B. Remixing to restore plasticityExplanation
Within three and one-half hours of the initial mixing of a mix of Portland cement plaster, the only adjustment allowed is remixing to restore plasticity. This means that if the plaster starts to harden or lose its workability within this time frame, it can be remixed to make it easier to work with again. Retempering with additional water is not allowed as it can negatively affect the strength and durability of the plaster. Therefore, the correct answer is remixing to restore plasticity.Rate this question:
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- 12.
Rich mixes of plaster, high in cement content, generally result in plaster with...
- A.
Lower strength
- B.
Greater economy
- C.
Lower initial shrinkage
- D.
Higher intital shrinkage
Correct Answer
D. Higher intital shrinkageExplanation
Rich mixes of plaster, high in cement content, generally result in higher initial shrinkage. This is because the higher cement content leads to a faster drying and setting process, causing the plaster to shrink more quickly.Rate this question:
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- 13.
Portland cement plaster should be applied over a level base in a uniform thickness..
- A.
To achieve greater economy
- B.
To reduce cracking
- C.
To improve its appearance
- D.
To increase speed
Correct Answer
B. To reduce crackingExplanation
Applying Portland cement plaster over a level base in a uniform thickness helps to reduce cracking. When the base is level and the plaster is applied evenly, it creates a more stable and balanced surface. This reduces the chances of stress and movement within the plaster, which can lead to cracks. By ensuring a uniform thickness, the plaster is more likely to dry and cure evenly, further reducing the risk of cracking. Overall, this method promotes a stronger and more durable plaster finish.Rate this question:
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- 14.
Type X wallboard is...
- A.
Water-resistant
- B.
Sound-resistant
- C.
Impact-resistant
- D.
Fire resistant
Correct Answer
D. Fire resistantExplanation
Type X wallboard is fire resistant because it is made with a special gypsum core that contains glass fibers and other additives. These additives help to slow down the spread of fire by releasing water vapor when exposed to high temperatures. This helps to limit the damage caused by fire and gives occupants more time to evacuate the building.Rate this question:
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- 15.
The core of water-resistant wall board is formulated with what type of additives?
- A.
Asphaltic
- B.
Acrylic
- C.
Portland cement
- D.
Aluminum oxide
Correct Answer
A. AspHalticExplanation
The core of water-resistant wall board is formulated with asphaltic additives. These additives provide the board with water resistance properties, making it suitable for areas where moisture is present, such as bathrooms and kitchens. Asphaltic additives create a barrier that prevents water from penetrating the board, protecting it from damage and ensuring its durability over time.Rate this question:
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- 16.
The type of gypsum board is perforated is...
- A.
Backing board
- B.
Sheathing
- C.
Lath
- D.
Formboard
Correct Answer
C. LathExplanation
Lath is a type of gypsum board that is perforated. Lath is commonly used as a base for plaster or stucco finishes on walls and ceilings. The perforations in the lath allow the plaster or stucco to adhere properly and create a strong and durable surface.Rate this question:
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- 17.
Regarding the attachment of gypsum board to wood members, staples are recommended only for attaching...
- A.
Fire-resistant board
- B.
The base ply in multi-ply construction
- C.
Predecorated board
- D.
Tapered board on the long dimension
Correct Answer
B. The base ply in multi-ply constructionExplanation
Staples are recommended only for attaching the base ply in multi-ply construction because they provide a secure and strong attachment. In multi-ply construction, multiple layers of gypsum board are used to provide enhanced strength and durability. The base ply is the bottom layer, which serves as a solid foundation for the rest of the layers. Using staples to attach the base ply ensures that it is firmly secured to the wood members, preventing any movement or instability in the gypsum board installation.Rate this question:
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- 18.
Identify the disadvantage of contact adhesive for installing gypsum board.
- A.
Inability to bridge irregularities
- B.
Cannot be used to bond wallboard to metal studs in demountable partitions
- C.
Lacks significant long term strength
- D.
Does not provide immediate bond
Correct Answer
A. Inability to bridge irregularitiesExplanation
Contact adhesive for installing gypsum board has the disadvantage of being unable to bridge irregularities. This means that if there are any uneven or rough surfaces on the substrate or the gypsum board itself, the adhesive will not be able to create a strong bond across those irregularities. This can result in a weaker and less secure installation of the gypsum board.Rate this question:
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- 19.
What is the minimum temperature at which gypsum board should be installed?
- A.
35 degrees F
- B.
45 degrees F
- C.
55 degrees F
- D.
65 degrees
Correct Answer
C. 55 degrees FExplanation
Gypsum board should be installed at a minimum temperature of 55 degrees F. This is because at lower temperatures, the moisture in the gypsum board can freeze, causing the board to become brittle and potentially leading to cracks or other damage. Installing the gypsum board at a higher temperature ensures that it remains stable and durable.Rate this question:
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- 20.
Which surface of a space should first be clad with gypsum board first?
- A.
Walls
- B.
Ceilings
- C.
Walls and ceiling should be clad simultaneously beginning at one end of the space and progressing toward the other
- D.
Neither walls nor the ceiling are recommended to be clad first
Correct Answer
B. CeilingsExplanation
Ceilings should be clad with gypsum board first because it is common practice to start from the top and work downwards when installing materials in a space. By starting with the ceilings, it allows for easier installation and ensures that the walls can be properly finished and sealed against the ceiling. Additionally, starting with the ceilings can help prevent any damage or marks on the walls that may occur during the installation process.Rate this question:
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- 21.
Caulking is recommended around the edges of partitions between apartment to...
- A.
Reduce sound transmission
- B.
Reduce the heat loss
- C.
Increase the fire rating of the partition
- D.
Reduce the need for trim
Correct Answer
A. Reduce sound transmissionExplanation
Caulking is recommended around the edges of partitions between apartments to reduce sound transmission. Caulking helps to seal any gaps or cracks in the partition, preventing sound from traveling through and reducing noise transfer between the apartments. This can help to create a quieter and more peaceful living environment for the residents.Rate this question:
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- 22.
In which circumstance can foill-backed gypsum board be used?
- A.
As the backing for ceramic tile
- B.
As the face ply in laminated two-ply construction
- C.
Adjacent to a dead air space
- D.
For laminating directly to masonry or concrete
Correct Answer
C. Adjacent to a dead air spaceExplanation
Foill-backed gypsum board can be used adjacent to a dead air space. This is because the dead air space provides insulation and helps to prevent heat transfer, making it suitable for use with the foill-backed gypsum board. The foil backing on the board also adds an additional layer of insulation, further enhancing its thermal properties. Therefore, using the foill-backed gypsum board in this circumstance helps to improve energy efficiency and maintain a comfortable indoor temperature.Rate this question:
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- 23.
Where can gypsum board be used in exterior locations (if any)?
- A.
As fascia boards
- B.
On soffits
- C.
On rake trim
- D.
Gypsum board cannot be used in the exterior
Correct Answer
B. On soffitsExplanation
Gypsum board can be used on soffits in exterior locations.Rate this question:
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- 24.
In which location is water-resistant gypsum board recommended for use?
- A.
Shower room walls
- B.
Shower room ceilings
- C.
Sauna walls
- D.
As a base for wall tile in tub-shower areas
Correct Answer
D. As a base for wall tile in tub-shower areasExplanation
Water-resistant gypsum board is recommended for use as a base for wall tile in tub-shower areas. This is because tub and shower areas are prone to moisture and water exposure, which can lead to damage and mold growth if not properly protected. Water-resistant gypsum board is designed to withstand these conditions and provide a durable and moisture-resistant surface for the installation of wall tiles.Rate this question:
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- 25.
Partitions utilizing gypsum board..
- A.
Can be made entirely of gypsum board except for metal runners at the floor and ceiling
- B.
Required wood or metal framing for support
- C.
Cannot be assembled with a masonry substrate
- D.
Require threaded fasteners
Correct Answer
A. Can be made entirely of gypsum board except for metal runners at the floor and ceilingExplanation
Gypsum board partitions can be made entirely of gypsum board, with the exception of metal runners at the floor and ceiling. This means that the main structure of the partition is made of gypsum board, but additional support is provided by metal runners. These runners are necessary to ensure stability and strength in the partition.Rate this question:
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- 26.
How many coats of joint compound are recommended as the minimum for taped joints in standard gypsum board construction?
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
C. ThreeExplanation
In standard gypsum board construction, it is recommended to apply a minimum of three coats of joint compound for taped joints. This is necessary to ensure proper coverage and a smooth finish. The multiple coats allow for filling gaps and imperfections in the joint, creating a seamless appearance. Applying fewer coats may result in visible seams and a less durable finish. Therefore, three coats are the minimum requirement for achieving a professional and high-quality result.Rate this question:
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- 27.
What is recommended regarding the wetness of each layer of joint compound prior to the installation of the next coat?
- A.
Even numbered coats should be damp when next coat is applied
- B.
Odd numbered coats should be damp when the next coast is applied
- C.
All coast should be damp when the next coat is applied
- D.
All coats should be dry when the next coat is applied
Correct Answer
D. All coats should be dry when the next coat is appliedExplanation
It is recommended that all coats of joint compound should be dry when the next coat is applied. This is because applying the next coat of joint compound on a wet or damp surface can cause the layers to mix and not adhere properly, leading to a weaker and less smooth finish. By allowing each coat to dry completely before applying the next one, it ensures better adhesion and a more professional-looking result.Rate this question:
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- 28.
A major cause of nail popping in gypsum board surface is...
- A.
Faulty taping of the joints
- B.
Shrinkage of the wood framing
- C.
Use of excessively short nails
- D.
Panels installed across the studs in the wrong or orientation
Correct Answer
B. Shrinkage of the wood framingExplanation
Nail popping in gypsum board surface is often caused by the shrinkage of the wood framing. As the wood framing dries out and loses moisture, it shrinks, causing movement and stress on the gypsum board. This can lead to the nails pulling away from the board and popping out. Faulty taping of the joints, use of excessively short nails, and panels installed across the studs in the wrong orientation can also contribute to nail popping, but shrinkage of the wood framing is a major cause.Rate this question:
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- 29.
Breaking the face paper of the gypsum board at the nail head during installation...
- A.
Is required for a snug fit of the nail
- B.
Is inconsequential as long as a break is covered with the correct number of layers of joint compound.
- C.
Contributes to the eventual loosening of the panel
- D.
Lowers the fire rating of the wall if it occurs at over have the nails in the wall
Correct Answer
C. Contributes to the eventual loosening of the panelExplanation
Breaking the face paper of the gypsum board at the nail head during installation contributes to the eventual loosening of the panel. When the face paper is broken, it weakens the overall structure of the board and reduces its ability to hold the nail securely in place. This can lead to the panel becoming loose over time, causing potential issues such as cracking or sagging. It is important to ensure that the face paper remains intact during installation to maintain the stability and longevity of the gypsum board.Rate this question:
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- 30.
Who is the best girldfriend in the entire world?
- A.
LALA
- B.
MARIE
- C.
LAUREN
Correct Answer
C. LAUREN -
- 31.
Which tile types are suitable for exterior installation subject to freezing and interior installation subject to continuous immersion in water?
- A.
Nonvitreous and semi-vitreous
- B.
Semi-vitreous and vitreous
- C.
Vitreous and impervious
- D.
Impervious and nonvitreous
Correct Answer
C. Vitreous and imperviousExplanation
Vitreous and impervious tile types are suitable for exterior installation subject to freezing and interior installation subject to continuous immersion in water. Vitreous tiles have a low water absorption rate, making them less likely to crack or break due to freezing and thawing cycles. Impervious tiles have an even lower water absorption rate, making them highly resistant to water damage. Therefore, these tile types are the most suitable for these specific installation conditions.Rate this question:
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- 32.
What is the relationship between the bonding strength and chemical resistance of resinous tile-setting materials such as epoxies and furans to the cementitious mortars?
- A.
The resinous tile-setting materials have greater bonding strength and chemical resistance
- B.
The resinous tile-setting materials have lower bonding strength and chemical resistance
- C.
The bonding strength and chemical resistance of the two are about equal
- D.
Some resinous materials have higher and some have lower bonding strength and chemical resistance
Correct Answer
A. The resinous tile-setting materials have greater bonding strength and chemical resistanceExplanation
The correct answer states that resinous tile-setting materials such as epoxies and furans have greater bonding strength and chemical resistance compared to cementitious mortars. This implies that these resinous materials are more effective in forming strong bonds and are more resistant to chemical deterioration when used for tile-setting purposes.Rate this question:
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- 33.
Before plywood that is to be used as the substrate for wall tile is installed...
- A.
Its edges should be sealed with an exterior primer or aluminum paint
- B.
Its back should be sealed with an exterior primer or aluminum paint
- C.
Its face should be sealed with an exterior primer or aluminum paint
- D.
All surfaces and edges should be sealed with an exterior primer or aluminum paint
Correct Answer
A. Its edges should be sealed with an exterior primer or aluminum paintExplanation
Before plywood that is to be used as the substrate for wall tile is installed, its edges should be sealed with an exterior primer or aluminum paint. This is because the edges of plywood are more susceptible to moisture penetration and can lead to swelling or warping if not properly sealed. Sealing the edges with a primer or paint helps to create a barrier that prevents moisture from entering the plywood, ensuring its durability and stability when used as a substrate for wall tile.Rate this question:
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- 34.
In which circumstance is a cleavage membrane required for tile set over a concrete slab?
- A.
Interior slabs
- B.
Exterior slabs
- C.
Structural (supported) slabs
- D.
Slabs-on-grade
Correct Answer
C. Structural (supported) slabsExplanation
A cleavage membrane is required for tile set over a concrete slab in the circumstance of structural (supported) slabs. This is because structural slabs are typically subjected to more movement and stress compared to interior or exterior slabs. The cleavage membrane helps to prevent any cracks or movement in the concrete slab from transferring to the tile, ensuring the durability and longevity of the tile installation.Rate this question:
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- 35.
An advantage of bonded setting beds for tile on concrete is that ...
- A.
They isolate the tile from stresses in the slab below
- B.
They provide smooth finishes over relatively rough surfaces
- C.
They secure the tile to the concrete so the two materials act structurally as one
- D.
They utilize the latest sophisticated tile setting materials and techniques
Correct Answer
B. They provide smooth finishes over relatively rough surfacesExplanation
Bonded setting beds for tile on concrete provide smooth finishes over relatively rough surfaces. This means that even if the concrete surface is not perfectly smooth, the bonded setting bed can create a level and even surface for the tile installation. This is beneficial as it allows for a more aesthetically pleasing and professional-looking tile installation, without the need for extensive surface preparation or leveling of the concrete slab.Rate this question:
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- 36.
When using organic adhesive for the installation of wall tile on interior surfaces...
- A.
Tamping of the tile into the adhesive is not permitted
- B.
The surface to which the adhesive is applied cannot be plywood
- C.
Grouping should be delayed for at least 24 hours to permit solvent evaporation
- D.
Latex grouts are not permitted
Correct Answer
C. Grouping should be delayed for at least 24 hours to permit solvent evaporationExplanation
The correct answer is that grouping should be delayed for at least 24 hours to permit solvent evaporation. This is because organic adhesives contain solvents that need time to evaporate before the tiles can be grouped together. If the tiles are grouped too soon, the solvents may not have fully evaporated, which can lead to improper adhesion and potential failure of the tile installation. Therefore, it is important to allow sufficient time for the solvents to evaporate before grouping the tiles.Rate this question:
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- 37.
The primary cementitious binder used in terrazzo is...
- A.
Epxoy
- B.
Epoxy mortar
- C.
Latex
- D.
Portland cement
Correct Answer
D. Portland cementExplanation
Terrazzo is a flooring material that consists of chips of various materials embedded in a cementitious binder. The primary cementitious binder used in terrazzo is portland cement. Portland cement is a commonly used binding material in construction due to its strong adhesive properties and ability to harden and create a durable surface. It is a key component in terrazzo as it helps hold the chips together and provides strength and stability to the flooring.Rate this question:
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- 38.
Decorative chips in terrazzo toppings consist principally of..
- A.
Granite
- B.
Marble
- C.
Basalt
- D.
Sandstone
Correct Answer
B. MarbleExplanation
Decorative chips in terrazzo toppings consist principally of marble. Terrazzo is a flooring material that is made by embedding small chips of various materials into a cement or resin base. Marble chips are commonly used in terrazzo because of their natural beauty, durability, and availability in a wide range of colors and patterns. Marble chips add a luxurious and elegant look to terrazzo surfaces, making it a popular choice for high-end residential and commercial spaces.Rate this question:
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- 39.
Which terrazzo system provides the most crack control and are preferred wherever strucural movement is expected?
- A.
Unbonded
- B.
Partially bonded
- C.
Bonded
- D.
Double bonded
Correct Answer
A. UnbondedExplanation
The unbonded terrazzo system provides the most crack control and is preferred wherever structural movement is expected. This system allows for independent movement between the terrazzo topping and the substrate, reducing the risk of cracks caused by structural movement. By not being bonded to the substrate, the terrazzo can move freely without transferring stress to the topping, resulting in better crack control.Rate this question:
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- 40.
What is the lowest quality of plywood recommended for use as the subfloor under a thin-set resinous terrazzo toppings?
- A.
AC-standard
- B.
CD-standard
- C.
AD deck
- D.
CC-plugged
Correct Answer
D. CC-pluggedExplanation
CC-plugged is the lowest quality of plywood recommended for use as the subfloor under a thin-set resinous terrazzo topping. Plywood with a CC-plugged rating means that it has a C-grade face veneer and a C-grade back veneer, with both sides being plugged. This indicates that the plywood may have knots, voids, or other imperfections that have been filled with plugs. While not the highest quality, CC-plugged plywood is still suitable for use as a subfloor, providing a stable and even surface for the terrazzo topping.Rate this question:
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- 41.
An underbed is necessary primarily in what type of terrazzo installations?
- A.
Unbonded
- B.
Partially bonded
- C.
Bonded
- D.
Double bonded
Correct Answer
C. BondedExplanation
An underbed is necessary primarily in bonded terrazzo installations. In bonded terrazzo, the terrazzo is directly bonded to a concrete substrate, which requires an underbed to provide a smooth and stable surface for the terrazzo to adhere to. The underbed helps to prevent any movement or cracking between the terrazzo and the substrate, ensuring a durable and long-lasting installation.Rate this question:
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- 42.
A terrazzo installation underbed should..
- A.
Not be reinforced with welded wire fabric
- B.
Be reinforced with welded wire fabric in all bonded installations
- C.
Be reinforced with welded wire fabric in all unbonded installations
- D.
Be reinforced with welded wire fabric in bonded installations over concrete
Correct Answer
C. Be reinforced with welded wire fabric in all unbonded installationsExplanation
In terrazzo installations, the underbed refers to the layer underneath the terrazzo flooring. When the installation is unbonded, meaning the terrazzo is not directly adhered to the substrate, it is necessary to reinforce the underbed with welded wire fabric. This is because the underbed provides support and stability for the terrazzo, and the welded wire fabric helps to prevent cracking or shifting of the terrazzo over time. Therefore, in all unbonded installations, it is important to use welded wire fabric for reinforcement.Rate this question:
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- 43.
Sounds broadcast into a space to mask noise are known as...
- A.
Ambient sound
- B.
White noise
- C.
Reverberation
- D.
CSTC
Correct Answer
B. White noiseExplanation
White noise refers to sounds that contain all frequencies at equal intensity. When white noise is broadcast into a space, it helps to mask or drown out other unwanted sounds by providing a constant, non-distracting background noise. This can be particularly useful in environments where concentration or relaxation is desired, such as offices, bedrooms, or public spaces. By filling the space with a consistent sound, white noise helps to minimize the perception of other disruptive noises and create a more peaceful and focused environment.Rate this question:
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- 44.
Identify a disadvantage of concealed suspension system for composition tile.
- A.
Tiles are difficult to remove
- B.
They are prohibitively expensive
- C.
The fastening system lacks sturdiness
- D.
Expansion and contraction eventually damages the tile
Correct Answer
A. Tiles are difficult to removeExplanation
The disadvantage of concealed suspension system for composition tile is that the tiles are difficult to remove. This implies that if there is a need to replace or repair any of the tiles, it would be a challenging and time-consuming process. This can result in additional labor and cost, making it inconvenient for maintenance or renovation purposes.Rate this question:
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- 45.
Which is the lightest category of hung ceiling suspension system that can support light fixtures and air diffusers in addition to the acoustical materials?
- A.
Light-duty
- B.
Intermediate-duty
- C.
Heavy duty
- D.
Extra heavy duty
Correct Answer
B. Intermediate-dutyExplanation
The correct answer is "intermediate-duty". This category of hung ceiling suspension system is the lightest one that can support not only acoustical materials but also light fixtures and air diffusers. It is designed to handle a moderate amount of weight and is suitable for most commercial and residential applications where additional items need to be suspended from the ceiling.Rate this question:
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- 46.
In exterior installations which metal is not recommended for use as a concealed metal component in hung ceiling system?
- A.
Aluminum
- B.
Stainless steel
- C.
Galvanized steel
- D.
Carbon steel
Correct Answer
D. Carbon steelExplanation
Carbon steel is not recommended for use as a concealed metal component in a hung ceiling system in exterior installations. This is because carbon steel is more prone to corrosion and rusting when exposed to outdoor elements such as moisture and humidity. On the other hand, aluminum, stainless steel, and galvanized steel are more resistant to corrosion and are therefore better suited for exterior use.Rate this question:
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- 47.
Suspension system members that abut vertical or overhead building structural elements...
- A.
Should be secured to them so as to act as a unit
- B.
Should provide a structural link between elements on opposite sides of an expansion joint.
- C.
Should brace the structure against seismic movement
- D.
Should be isolated from structural movement
Correct Answer
D. Should be isolated from structural movementExplanation
Suspension system members should be isolated from structural movement to ensure that any movement or vibrations in the building do not affect the suspension system. This is important because if the suspension system is not isolated, it may be subject to unnecessary stress and strain, leading to potential damage or failure. By isolating the suspension system from structural movement, it can function effectively and independently, providing stability and support without being affected by the building's movements.Rate this question:
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- 48.
Identify the smallest nominal thickness of wood furring typically acceptable for support and acoustical ceiling on framing
- A.
One inch
- B.
Two inch
- C.
Three inch
- D.
Four inch
Correct Answer
B. Two inchExplanation
The correct answer is two inch because it is the smallest nominal thickness of wood furring that is typically acceptable for supporting an acoustical ceiling on framing. This thickness provides enough stability and strength to hold the ceiling in place and ensure proper installation. Thinner furring may not be able to adequately support the weight of the ceiling and could lead to structural issues or a compromised acoustical performance.Rate this question:
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- 49.
The majority of sound absorbing fabric panels and baffles are largely or entirely...
- A.
Polyester
- B.
Wool
- C.
Nylon
- D.
Rayon
Correct Answer
A. PolyesterExplanation
The majority of sound absorbing fabric panels and baffles are largely or entirely made of polyester. Polyester is a synthetic material that is known for its durability, versatility, and ability to absorb sound. It is commonly used in acoustic treatments due to its high sound absorption coefficient and ability to reduce echo and reverberation in a space. Additionally, polyester is resistant to moisture, mold, and mildew, making it a suitable choice for environments with high humidity levels.Rate this question:
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- 50.
Acoustical wall panels and baffles are generally classified by their...
- A.
Absorption Rating (AR)
- B.
Sound Attenuation Number (SAN)
- C.
Noise Reduction Coefficient (NRC)
- D.
Reverberation Absorption Quotient (RAQ)
Correct Answer
A. Absorption Rating (AR)Explanation
Acoustical wall panels and baffles are classified by their absorption rating (AR). The absorption rating measures the panel's ability to absorb sound energy. This rating indicates how much sound the panel can absorb and prevent from reflecting back into the room. Panels with a higher absorption rating are more effective at reducing echo and controlling reverberation. Therefore, the absorption rating is an important factor to consider when selecting acoustical wall panels and baffles for noise control and improving the acoustic quality of a space.Rate this question:
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Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Dec 03, 2010Quiz Created by
Laurenmariel
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