Architectural Glass Types,
Properties & Applications –
Exam Revision Questions &
Answers (2026)
1. Introduction to Glass in Architecture
What is glass as a construction material?
Glass is a non-crystalline, amorphous material used in
buildings mainly for transparency, aesthetics, and
environmental control.
Why is glass widely used in modern architecture?
Because it provides natural lighting, aesthetic appeal,
visibility, and energy efficiency.
What are the basic raw materials used in glass
production?
Silica sand, soda ash, limestone, and minor additives.
What is meant by glazing?
The installation of glass into windows, doors, or façades.
2. Physical & Mechanical Properties
,What type of material is glass structurally?
It is brittle and elastic, with high compressive strength but
low tensile strength.
What is the compressive strength of glass?
Approximately 1,000 MPa.
Why is glass weak in tension?
Because of surface flaws and micro-cracks that propagate
under tensile stress.
What is modulus of rupture in glass?
It is the measure of bending strength before failure.
What is the density of glass?
Approximately 2500 kg/m³.
What is hardness of glass?
Glass is relatively hard and scratch-resistant but can still
be damaged by harder materials.
3. Optical Properties
What is transparency?
The ability of glass to transmit light and allow visibility.
What is translucency?
Partial transmission of light without clear visibility.
,What is reflectivity?
The proportion of light reflected from the glass surface.
What is refractive index of glass?
It measures how much light bends when passing through
glass.
What is glare?
Excessive brightness caused by uncontrolled light
transmission.
4. Thermal Properties
What is thermal conductivity of glass?
It is relatively low, but higher than insulating materials.
What is U-value?
The rate of heat transfer through glass; lower values mean
better insulation.
What is thermal expansion?
The tendency of glass to expand when heated.
Why can glass crack under heat?
Due to uneven thermal expansion causing thermal stress.
5. Acoustic Properties
, Does glass provide sound insulation?
Yes, especially laminated and double-glazed glass.
What type of glass is best for soundproofing?
Laminated and insulated glass units.
6. Types of Architectural Glass
Basic Types
What is annealed glass?
Standard glass cooled slowly to reduce stress.
What is float glass?
Flat glass produced by floating molten glass on molten
tin.
Safety Glass
What is toughened (tempered) glass?
Glass that is heat-treated to increase strength and breaks
into small blunt pieces.
What is laminated glass?
Glass layers bonded with plastic interlayers for safety and
sound insulation.
Properties & Applications –
Exam Revision Questions &
Answers (2026)
1. Introduction to Glass in Architecture
What is glass as a construction material?
Glass is a non-crystalline, amorphous material used in
buildings mainly for transparency, aesthetics, and
environmental control.
Why is glass widely used in modern architecture?
Because it provides natural lighting, aesthetic appeal,
visibility, and energy efficiency.
What are the basic raw materials used in glass
production?
Silica sand, soda ash, limestone, and minor additives.
What is meant by glazing?
The installation of glass into windows, doors, or façades.
2. Physical & Mechanical Properties
,What type of material is glass structurally?
It is brittle and elastic, with high compressive strength but
low tensile strength.
What is the compressive strength of glass?
Approximately 1,000 MPa.
Why is glass weak in tension?
Because of surface flaws and micro-cracks that propagate
under tensile stress.
What is modulus of rupture in glass?
It is the measure of bending strength before failure.
What is the density of glass?
Approximately 2500 kg/m³.
What is hardness of glass?
Glass is relatively hard and scratch-resistant but can still
be damaged by harder materials.
3. Optical Properties
What is transparency?
The ability of glass to transmit light and allow visibility.
What is translucency?
Partial transmission of light without clear visibility.
,What is reflectivity?
The proportion of light reflected from the glass surface.
What is refractive index of glass?
It measures how much light bends when passing through
glass.
What is glare?
Excessive brightness caused by uncontrolled light
transmission.
4. Thermal Properties
What is thermal conductivity of glass?
It is relatively low, but higher than insulating materials.
What is U-value?
The rate of heat transfer through glass; lower values mean
better insulation.
What is thermal expansion?
The tendency of glass to expand when heated.
Why can glass crack under heat?
Due to uneven thermal expansion causing thermal stress.
5. Acoustic Properties
, Does glass provide sound insulation?
Yes, especially laminated and double-glazed glass.
What type of glass is best for soundproofing?
Laminated and insulated glass units.
6. Types of Architectural Glass
Basic Types
What is annealed glass?
Standard glass cooled slowly to reduce stress.
What is float glass?
Flat glass produced by floating molten glass on molten
tin.
Safety Glass
What is toughened (tempered) glass?
Glass that is heat-treated to increase strength and breaks
into small blunt pieces.
What is laminated glass?
Glass layers bonded with plastic interlayers for safety and
sound insulation.
