L1 Certificate In The Principles Of Window And Door Installation (Qcf): Unit 4
M/505/3151: Knowledge of Window and Door Components and Fixings
Questions and Answers
- 1.
The industry accepted distance that screws should penetrate into plugged holes in brick, block, or masonry is?
- A.
40mm
- B.
25mm
- C.
As far as you can go
- D.
10mm
Correct Answer
A. 40mmExplanation
The industry accepted distance that screws should penetrate into plugged holes in brick, block, or masonry is 40mm. This is the recommended depth to ensure a secure and stable attachment. Going deeper than 40mm may weaken the structure, while going shallower may not provide enough grip for the screw. Therefore, 40mm is the optimal depth for screws in these materials.Rate this question:
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- 2.
The industry accepted distance that screws should penetrate into timber is?
- A.
As far as you can go
- B.
25mm
- C.
40mm
- D.
10mm
Correct Answer
B. 25mmExplanation
The industry accepted distance that screws should penetrate into timber is 25mm. This depth provides sufficient grip and stability for the screw, ensuring a secure connection between the timber pieces. Going deeper may weaken the timber or cause it to split, while a shallower penetration may not provide enough holding power. Therefore, 25mm is the recommended depth for screws in timber.Rate this question:
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- 3.
The correct purpose of expanding foam in the installation of windows is?
- A.
To avoid the use of screws
- B.
To weatherproof the window
- C.
To fill in large gaps
- D.
To stick the frame to the brickwork
Correct Answer
C. To fill in large gapsExplanation
The correct purpose of expanding foam in the installation of windows is to fill in large gaps. Expanding foam is a versatile material that expands and hardens after being applied, which makes it ideal for filling in any spaces or gaps around the window frame. This helps to ensure a tight seal and prevent any drafts or moisture from entering the building. Additionally, it provides insulation and improves the overall energy efficiency of the window installation.Rate this question:
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- 4.
How do you ensure that frames are weatherproof?
- A.
Use Film on the frame
- B.
Paint them
- C.
Carry out a water test
- D.
Tilt them away from the prevailing winds
Correct Answer
C. Carry out a water testExplanation
To ensure that frames are weatherproof, carrying out a water test is the most effective method. This involves exposing the frames to water, such as spraying or submerging them, to check if any water seeps through. If the frames pass the water test without any leakage, it indicates that they are properly sealed and can withstand different weather conditions. This method helps to identify any potential weak points or gaps in the frame's construction, allowing for necessary adjustments or repairs to be made before installation.Rate this question:
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- 5.
Two types of glass used for glazing are?
- A.
Clear and Etched
- B.
Toughened and Laminated
- C.
Toughened and Untoughened
- D.
Laminated and Unlaminated
Correct Answer
B. Toughened and LaminatedExplanation
The correct answer is toughened and laminated. Toughened glass is a type of safety glass that is processed by controlled thermal or chemical treatments to increase its strength compared to normal glass. It is commonly used in applications where safety is a concern, such as car windows and shower doors. Laminated glass, on the other hand, is made by sandwiching a layer of plastic between two layers of glass. This type of glass is used in situations where security and safety are important, such as in windows and windshields, as it holds together when shattered.Rate this question:
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- 6.
Laminated Glass offers the following benefit?
- A.
Less Costly
- B.
Security from breakage
- C.
Lightness
- D.
The cheapest option
Correct Answer
B. Security from breakageExplanation
Laminated Glass offers security from breakage because it is made by sandwiching a layer of polyvinyl butyral (PVB) between two layers of glass. This PVB layer acts as a protective barrier, preventing the glass from shattering upon impact. In case of breakage, the glass remains held together by the PVB layer, reducing the risk of injury from sharp glass shards. Therefore, laminated glass is a safer option compared to regular glass in terms of security and safety.Rate this question:
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- 7.
Toughened Glass is stronger than Laminated Glass
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Toughened glass is indeed stronger than laminated glass. Toughened glass undergoes a process of controlled thermal treatment, which increases its strength and resistance to impact. It is made by heating the glass to a high temperature and then rapidly cooling it, creating compressive stresses on the surface. This process makes toughened glass several times stronger than regular glass. On the other hand, laminated glass is made by sandwiching a layer of plastic between two layers of glass. While laminated glass offers benefits like improved safety and sound insulation, it is not as strong as toughened glass.Rate this question:
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- 8.
Windows are usually made out of the following materials?
- A.
Hardwood, Softwood, and Wood Veneer
- B.
Low Carbon, Low energy, and Environmentally-Friendly
- C.
Timber, Metal, and PVC-u
- D.
Polycarbonate
Correct Answer
C. Timber, Metal, and PVC-uExplanation
Windows are typically made out of timber, metal, and PVC-u materials. Timber windows are popular for their natural and traditional look, as well as their insulation properties. Metal windows, such as aluminum or steel, are known for their strength and durability. PVC-u windows, made from unplasticized polyvinyl chloride, are low-maintenance, energy-efficient, and provide good insulation. These three materials offer a range of options for windows, allowing homeowners to choose based on their aesthetic preferences, performance requirements, and budget.Rate this question:
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- 9.
Glazing Packers are used to fasten and position the glass into the frame
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Glazing Packers are small plastic or rubber spacers that are used to secure and align glass within a frame. These packers are placed between the glass and the frame to provide support and ensure that the glass is positioned correctly. By using glazing packers, the glass is held securely in place, preventing it from shifting or moving within the frame. Therefore, the statement that Glazing Packers are used to fasten and position the glass into the frame is true.Rate this question:
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- 10.
A Bay Window has THREE openings, and a Bow Window has more
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A bay window typically consists of three openings, while a bow window usually has more than three openings. Therefore, the statement "A Bay Window has THREE openings, and a Bow Window has more" is true.Rate this question:
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- 11.
Bay Windows are usually wider than Bow Windows?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Bay windows are not usually wider than bow windows. In fact, bow windows are typically wider than bay windows. Bay windows consist of three windows that are angled to protrude from the wall, while bow windows are made up of four or more windows that create a curved shape. The curved shape of bow windows allows for a greater width compared to the angled design of bay windows. Therefore, the correct answer is false.Rate this question:
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- 12.
Bay Windows usually protrude farther from the wall into the exterior space?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Bay windows are designed to protrude farther from the wall into the exterior space. This architectural feature creates additional interior space and allows for a wider view of the surroundings. The extended projection of bay windows also adds visual interest to the exterior of the building, enhancing its curb appeal. Therefore, it is true that bay windows usually protrude farther from the wall into the exterior space.Rate this question:
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- 13.
Gaskets are normally made out of THREE of the following materials? \indicate which ones?
- A.
Rubber
- B.
Nylon
- C.
Metal
- D.
Wood
- E.
Fabric / natural material
Correct Answer(s)
A. Rubber
B. Nylon
E. Fabric / natural materialExplanation
Gaskets are typically made out of rubber, nylon, and fabric/natural material. These materials are commonly used for their ability to create a tight seal and withstand pressure and temperature variations. Rubber is flexible and resistant to chemicals, making it suitable for various applications. Nylon is durable and has good mechanical properties, making it ideal for gaskets that require strength. Fabric or natural materials, such as cork or felt, are often used for their compressibility and ability to conform to irregular surfaces, ensuring a reliable seal. Metal and wood are not commonly used for gaskets due to their lack of flexibility and sealing properties.Rate this question:
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- 14.
Laminated Glass has greater sound insulation than Toughened Glass?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Laminated glass has greater sound insulation than toughened glass because of its composition. Laminated glass consists of two or more layers of glass with an interlayer of polyvinyl butyral (PVB) between them. This interlayer acts as a sound barrier, reducing the transmission of sound waves through the glass. On the other hand, toughened glass is formed by heating and cooling the glass rapidly, which makes it stronger but does not provide the same level of sound insulation as laminated glass. Therefore, the statement that laminated glass has greater sound insulation than toughened glass is true.Rate this question:
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- 15.
What characteristically happens when Toughened glass is broken?
- A.
It shatters into sharp shards
- B.
It produces a "spiders Web" pattern
- C.
It shatters into small fragments
- D.
It is held together by the resin layers
Correct Answer
C. It shatters into small fragmentsExplanation
When toughened glass is broken, it shatters into small fragments. Unlike regular glass, toughened glass undergoes a special heating and cooling process to increase its strength. This process creates tension within the glass, causing it to break into small, less dangerous pieces instead of sharp shards. This characteristic makes toughened glass safer to handle and reduces the risk of injury from broken glass.Rate this question:
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- 16.
What distance from a corner should a fixing for a Timber or PVC-u window be?
- A.
150m to 250m
- B.
As near as possible
- C.
50mm to 100mm
- D.
150mm to 250mm
Correct Answer
D. 150mm to 250mmExplanation
The correct answer is 150mm to 250mm. When fixing a Timber or PVC-u window, it is recommended to place the fixing at a distance of 150mm to 250mm from the corner. This ensures that the window is securely attached to the wall and provides proper support. Placing the fixing too close to the corner may weaken the structure, while placing it too far may not provide enough support. Therefore, the ideal distance for the fixing is within the range of 150mm to 250mm.Rate this question:
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- 17.
The recommended distance for fixing centres on frames should not exceed 600mm?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The recommended distance for fixing centers on frames should not exceed 600mm because exceeding this distance can compromise the stability and strength of the frame. By keeping the fixing centers within this limit, the frame will be properly supported and able to withstand the intended load or force. This ensures the safety and durability of the frame.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
ProProfs Editorial Team -
Jun 17, 2014Quiz Created by
Julianmci
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