Question 1

Glass can be tempered as well as laminated; that is, laminated, tempered glass is available.

Accepted Answer

A) True 
 B)False  True

Question 2

When direct solar beam falls on a sheet of glass, a part of solar energy is transmitted through glass into the building interior, a part is reflected, and a part is absorbed by the glass. For a clear glass sheet, the percentage of transmitted energy is 85%, reflected energy is 10% and the remaining 5% is absorbed by glass. What is your estimate of the percentage solar heat gain (SHG)of this glass, defined as the percentage of solar energy that enters the building interior? Explain.

Accepted Answer

SHG of glass = 85% + part of the absorbed energy that is radiated into the building interior. The total absorbed energy in clear glass = 5%. Thus, if both inside and outside air are at the same temperature, SHG = 85% + 2.5% = 87.5%. If the outside air is cooler than the inside air, SHG < 87.5%. If the outside air is warmer than the inside air, SHG > 87.5%.

Question 3

What is annealed glass?

Accepted Answer

The flat glass obtained from float glass manufacturing process before subjecting it to any further treatment (e.g., heat treatment)or a fabrication process (e.g., laminated glass or insulating glass unit, etc.)is called annealed glass. Annealed glass is basic glass, that is, if no other glass type is specified, the glass obtained is annealed glass-the most commonly used.

Question 4

Give the approximate U- value of:
(i)an IGU with low- emissivity glass and dry air space
(ii)an IGU with clear sheets of glass and argon- filled space
(iii)an IGU with clear sheets of glass, low- E coating and argon- filled space

Accepted Answer

(i)an IGU with low- emissivity glass and

Question 5

Where is tempered glass (TG)mainly used?

Accepted Answer

When TG breaks, it breaks into tiny piec

Question 6

Would you specify a glass with high SHGC or low SHGC for: (i)warm climates, (ii)for cold climates?

Accepted Answer

A low SHGC for warm

Question 7

The approximate R- value of a clear glass sheet is

Accepted Answer

A) 1)0. 
B) 2)0. 
C) 3)0. 
D) 4)0. 
E) 5)0. 
A) 1)0. 
B) 2)0. 
C) 3)0. 
D) 4)0. 
E) 5)0.

Question 8

The glass obtained from the float- glass process without any further treatment is called

Accepted Answer

A) tempered glass. 
B) sheet glass. 
C) annealed glass. 
D) plate glass. 
E) heat- strengthened glass. 
A) tempered glass. 
B) sheet glass. 
C) annealed glass. 
D) plate glass. 
E) heat- strengthened glass.

Question 9

Which glass is considered missile- impact resistant in hurricane- prone regions?

Accepted Answer

The answer of Which glass is considered missile- impact resistant...

Question 10

To obtain an IGU with a high R- value, the space between the glass sheets should be

Accepted Answer

A) hydrogen filled. 
B) argon filled. 
C) air filled. 
D) none of the above. 
A) hydrogen filled. 
B) argon filled. 
C) air filled. 
D) none of the above.

Question 11

Which of the following types of glass is generally used as safety glass?

Accepted Answer

A) Annealed glass 
B) Heat- strengthened glass 
C) Plate glass 
D) Sheet glass 
E) Tempered glass 
A) Annealed glass 
B) Heat- strengthened glass 
C) Plate glass 
D) Sheet glass 
E) Tempered glass

Question 12

Why is the modern glass manufacturing process called float glass process?

Accepted Answer

The molten raw materials in glass manufa

Question 13

Surface 3 in an IGU is

Accepted Answer

A) the surface of the exterior glass sheet facing the exterior. 
B) the surface of the interior glass sheet facing the intervening space. 
C) the surface of the interior glass sheet facing the interior. 
D) the surface of the exterior glass sheet facing the intervening space. 
A) the surface of the exterior glass sheet facing the exterior. 
B) the surface of the interior glass sheet facing the intervening space. 
C) the surface of the interior glass sheet facing the interior. 
D) the surface of the exterior glass sheet facing the intervening space.

Question 14

A glazing stop is used

Accepted Answer

A) to seal the glass against water and air infiltration. 
B) as a bearing support for glass. 
C) to provide a cushion between the glass and the glazing pocket. 
D) to provide lateral support to glass. 
E) none of the above. 
A) to seal the glass against water and air infiltration. 
B) as a bearing support for glass. 
C) to provide a cushion between the glass and the glazing pocket. 
D) to provide lateral support to glass. 
E) none of the above.

Question 15

What is light- to- solar gain (LSG)index and its importance?

Accepted Answer

LSG = [(visible transmittance of glass,

Question 16

Why must an insulating glass unit (IGU)be fully sealed?

Accepted Answer

The air or gas filling within an IGU is

Question 17

Solar radiation is

Accepted Answer

A) longwave radiation. 
B) shortwave radiation. 
A) longwave radiation. 
B) shortwave radiation.

Question 18

If the glass is sealed with preshimmed tape and sealant, the glazing is referred to as

Accepted Answer

A) dry/wet glazed. 
B) wet/wet glazed. 
C) dry/dry glazed. 
D) wet glazed. 
E) dry glazed. 
A) dry/wet glazed. 
B) wet/wet glazed. 
C) dry/dry glazed. 
D) wet glazed. 
E) dry glazed.

Question 19

A reflective coating increases the R- value of glass only marginally.

Accepted Answer

A) True 
 B)False

Question 20

Before a reflective coating is applied on a glass, the glass must first be cut to size.

Accepted Answer

A) True 
 B)False

Exam 30: Glass, Glazing, and Light-Transmitting Plastics

Glass can be tempered as well as laminated; that is, laminated, tempered glass is available.

What is annealed glass?

Give the approximate U- value of: (i)an IGU with low- emissivity glass and dry air space (ii)an IGU with clear sheets of glass and argon- filled space (iii)an IGU with clear sheets of glass, low- E coating and argon- filled space

Where is tempered glass (TG)mainly used?

Would you specify a glass with high SHGC or low SHGC for: (i)warm climates, (ii)for cold climates?

The approximate R- value of a clear glass sheet is

The glass obtained from the float- glass process without any further treatment is called

Which glass is considered missile- impact resistant in hurricane- prone regions?

To obtain an IGU with a high R- value, the space between the glass sheets should be

Which of the following types of glass is generally used as safety glass?

Why is the modern glass manufacturing process called float glass process?

Surface 3 in an IGU is

A glazing stop is used

What is light- to- solar gain (LSG)index and its importance?

Why must an insulating glass unit (IGU)be fully sealed?

Solar radiation is

If the glass is sealed with preshimmed tape and sealant, the glazing is referred to as

A reflective coating increases the R- value of glass only marginally.

Before a reflective coating is applied on a glass, the glass must first be cut to size.

An Overview of the Building Delivery Process How Buildings Come Into Being

Design and Constructions Regulations

Loads on Buildings

Load Resistance the Structural Properties of Materials

Properties of the Envelope-I Thermal Properties

Properties of the Envelope-II Air and Water Vapor Control

Fire and Smoke-Related Properties

Acoustical Properties of Materials

Principles of Joints and Sealants Expansion and Contraction Control

Principles of Sustainable Construction

Soils and Excavations

Below-Grade Construction Foundation Systems and Basements

Materials for Wood Construction-I Lumber

Materials for Wood Construction-Ii Engineered Wood Products, Fasteners, and Connectors

Wood Light-Frame Construction-I

Wood Light-Frame Construction-II

Structural Insulated Panel Construction

Material Steel and Steel Components

Structural Steel Construction

Cold-Formed Steel Construction

Lime, Portland Cement, and Concrete

Concrete Construction-I Formwork, Reinforcement, and Slabs-On-Ground

Concrete Construction-II Site-Cast and Precast Concrete Framing Systems

Masonry Materials-I Mortar and Brick

Masonry Materials-II Concrete Masonry Units, Natural Stone, and Glass Masonry Units

Masonry and Concrete Bearing Wall Construction

Exterior Wall Cladding-I Principles of Rainwater Infiltration Control

Exterior Wall Cladding-II Masonry, Precast Concrete, and Gfrc

Exterior Wall Cladding-III Stucco, Adhered Veneer, Eifs, Natural Stone, and Insulated Metal Panels

Windows and Doors

Exterior Wall Cladding-Iv Wall System in Glass

Roofing-I Low-Slope Roofs

Roofing-I Steep Roofs

Stairs

Floor Coverings

Ceilings

Filters