36-FL-GG FL CON Glass and Glazing Exam
| Structured Study Notes and Topic
Review Questions And Answers Rated
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1. What is the primary function of glass in a building?
A. To provide structural reinforcement for concrete
B. To admit daylight and provide visibility
C. To replace all insulation
D. To eliminate the need for ventilation
Answer: B. To admit daylight and provide visibility.
Explanation: Glass is primarily used for daylighting, visibility, weather protection, and
architectural appearance. Depending on its properties, it can also provide thermal insulation,
solar control, sound reduction, and security. It is not a universal replacement for structural
reinforcement or mechanical ventilation.
2. Which raw material is the principal ingredient in ordinary soda-lime glass?
A. Silica sand
B. Portland cement
C. Gypsum
D. Asphalt
Answer: A. Silica sand.
Explanation: Silica, usually obtained from sand, forms the main glass-forming component. Soda
ash lowers the melting temperature, while limestone helps improve chemical durability. The
mixture is melted at high temperatures and cooled into glass.
, 3. What is soda ash used for in conventional glass manufacturing?
A. To increase the glass's weight
B. To lower the melting temperature of silica
C. To create a rubber seal
D. To prevent all glass breakage
Answer: B. To lower the melting temperature of silica.
Explanation: Pure silica melts at a very high temperature. Soda ash acts as a flux, reducing the
temperature required for melting and making manufacturing more practical. It does not make
glass unbreakable.
4. Which ingredient helps improve the chemical durability of soda-lime glass?
A. Limestone
B. Wood fiber
C. Bitumen
D. Gypsum
Answer: A. Limestone.
Explanation: Limestone supplies calcium compounds that contribute to the stability and
durability of soda-lime glass. Soda ash assists melting, while silica provides the primary glass-
forming network.
5. What is annealed glass?
A. Glass that has been chemically dissolved
B. Glass cooled in a controlled manner to reduce internal stress
C. Glass containing only plastic
D. Glass that cannot break
Answer: B. Glass cooled in a controlled manner to reduce internal stress.
,Explanation: Annealing involves controlled cooling through a temperature range where internal
stresses can be relieved. Ordinary annealed glass is not safety glazing and may break into large,
sharp shards.
6. Which type of glass is manufactured by floating molten glass on a bath of molten tin?
A. Laminated glass
B. Float glass
C. Wired glass
D. Ceramic glass
Answer: B. Float glass.
Explanation: The float process produces relatively flat, uniform glass with smooth surfaces. It is
widely used as the starting material for windows, mirrors, tempered glass, and other architectural
glazing products.
7. What is the main characteristic of tempered glass?
A. It is designed to break into relatively small, blunt-edged particles
B. It never breaks
C. It contains no silica
D. It is always opaque
Answer: A. It is designed to break into relatively small, blunt-edged particles.
Explanation: Tempered glass is heat-treated to increase its strength and create a safer break
pattern. When it fails, it generally disintegrates into many small pieces rather than large knife-
like shards. It remains breakable.
8. How is heat-strengthened glass different from fully tempered glass?
A. Heat-strengthened glass is always plastic
B. Heat-strengthened glass generally has lower strength and a different break pattern
C. Heat-strengthened glass cannot be used outdoors
D. Heat-strengthened glass is made without heating
, Answer: B. Heat-strengthened glass generally has lower strength and a different break pattern.
Explanation: Both products undergo controlled heating and cooling, but heat-strengthened glass
develops less surface compression than fully tempered glass. It generally breaks into larger
pieces and is not automatically acceptable wherever safety glazing is required.
9. What is laminated glass composed of?
A. Two or more glass plies bonded with an interlayer
B. A single pane coated with paint
C. Glass mixed with concrete
D. A solid sheet of aluminum
Answer: A. Two or more glass plies bonded with an interlayer.
Explanation: Laminated glass uses an interlayer, such as PVB or another approved material,
between glass plies. After breakage, the interlayer helps retain fragments and can improve
security, sound control, and solar performance.
10. What is a major advantage of laminated glass in safety applications?
A. It always prevents glass from cracking
B. Its interlayer helps retain broken glass fragments
C. It eliminates the need for framing
D. It is always cheaper than annealed glass
Answer: B. Its interlayer helps retain broken glass fragments.
Explanation: Laminated glass can remain substantially in place after cracking because the
interlayer holds fragments together. Its suitability for a specific safety, impact, or hurricane
application depends on the applicable tested assembly and code requirements.
11. What is the purpose of a glass interlayer?
A. To bond glass plies and help retain fragments
B. To replace the building's foundation
C. To eliminate all thermal expansion
| Structured Study Notes and Topic
Review Questions And Answers Rated
A+ New Update Assured Satisfaction
1. What is the primary function of glass in a building?
A. To provide structural reinforcement for concrete
B. To admit daylight and provide visibility
C. To replace all insulation
D. To eliminate the need for ventilation
Answer: B. To admit daylight and provide visibility.
Explanation: Glass is primarily used for daylighting, visibility, weather protection, and
architectural appearance. Depending on its properties, it can also provide thermal insulation,
solar control, sound reduction, and security. It is not a universal replacement for structural
reinforcement or mechanical ventilation.
2. Which raw material is the principal ingredient in ordinary soda-lime glass?
A. Silica sand
B. Portland cement
C. Gypsum
D. Asphalt
Answer: A. Silica sand.
Explanation: Silica, usually obtained from sand, forms the main glass-forming component. Soda
ash lowers the melting temperature, while limestone helps improve chemical durability. The
mixture is melted at high temperatures and cooled into glass.
, 3. What is soda ash used for in conventional glass manufacturing?
A. To increase the glass's weight
B. To lower the melting temperature of silica
C. To create a rubber seal
D. To prevent all glass breakage
Answer: B. To lower the melting temperature of silica.
Explanation: Pure silica melts at a very high temperature. Soda ash acts as a flux, reducing the
temperature required for melting and making manufacturing more practical. It does not make
glass unbreakable.
4. Which ingredient helps improve the chemical durability of soda-lime glass?
A. Limestone
B. Wood fiber
C. Bitumen
D. Gypsum
Answer: A. Limestone.
Explanation: Limestone supplies calcium compounds that contribute to the stability and
durability of soda-lime glass. Soda ash assists melting, while silica provides the primary glass-
forming network.
5. What is annealed glass?
A. Glass that has been chemically dissolved
B. Glass cooled in a controlled manner to reduce internal stress
C. Glass containing only plastic
D. Glass that cannot break
Answer: B. Glass cooled in a controlled manner to reduce internal stress.
,Explanation: Annealing involves controlled cooling through a temperature range where internal
stresses can be relieved. Ordinary annealed glass is not safety glazing and may break into large,
sharp shards.
6. Which type of glass is manufactured by floating molten glass on a bath of molten tin?
A. Laminated glass
B. Float glass
C. Wired glass
D. Ceramic glass
Answer: B. Float glass.
Explanation: The float process produces relatively flat, uniform glass with smooth surfaces. It is
widely used as the starting material for windows, mirrors, tempered glass, and other architectural
glazing products.
7. What is the main characteristic of tempered glass?
A. It is designed to break into relatively small, blunt-edged particles
B. It never breaks
C. It contains no silica
D. It is always opaque
Answer: A. It is designed to break into relatively small, blunt-edged particles.
Explanation: Tempered glass is heat-treated to increase its strength and create a safer break
pattern. When it fails, it generally disintegrates into many small pieces rather than large knife-
like shards. It remains breakable.
8. How is heat-strengthened glass different from fully tempered glass?
A. Heat-strengthened glass is always plastic
B. Heat-strengthened glass generally has lower strength and a different break pattern
C. Heat-strengthened glass cannot be used outdoors
D. Heat-strengthened glass is made without heating
, Answer: B. Heat-strengthened glass generally has lower strength and a different break pattern.
Explanation: Both products undergo controlled heating and cooling, but heat-strengthened glass
develops less surface compression than fully tempered glass. It generally breaks into larger
pieces and is not automatically acceptable wherever safety glazing is required.
9. What is laminated glass composed of?
A. Two or more glass plies bonded with an interlayer
B. A single pane coated with paint
C. Glass mixed with concrete
D. A solid sheet of aluminum
Answer: A. Two or more glass plies bonded with an interlayer.
Explanation: Laminated glass uses an interlayer, such as PVB or another approved material,
between glass plies. After breakage, the interlayer helps retain fragments and can improve
security, sound control, and solar performance.
10. What is a major advantage of laminated glass in safety applications?
A. It always prevents glass from cracking
B. Its interlayer helps retain broken glass fragments
C. It eliminates the need for framing
D. It is always cheaper than annealed glass
Answer: B. Its interlayer helps retain broken glass fragments.
Explanation: Laminated glass can remain substantially in place after cracking because the
interlayer holds fragments together. Its suitability for a specific safety, impact, or hurricane
application depends on the applicable tested assembly and code requirements.
11. What is the purpose of a glass interlayer?
A. To bond glass plies and help retain fragments
B. To replace the building's foundation
C. To eliminate all thermal expansion
