Deck 28: Glass

Question 1

When is ninety-six percent silica glass used?

Answer 1

Ninety-six percent silica is used when high thermal hardness and the ability to withstand the thermal shock of going rapidly from hot to cold is required.

Question 2

Describe block glass and how it is made.

Answer 2

Glass blocks are made by fusing two halves of pressed glass together, creating a space with a partial vacuum. This produces an insulating value equal to a 12 in. (305 mm) thick concrete wall (U-value 0.51, R-value 1.96). Glass blocks are very strong and provide excellent security.

Question 3

____ glass is safety glass with a mesh of small diameter wires rolled into sheets of molten glass.

A) Bent
B) Architectural beveled
C) Wired
D) Blocked

Answer 3

C

Question 4

What is patterned glass?

Question 5

Describe the chemical properties of soda-lime-silica glass.

Question 6

Glass surfaces can be coated with a(n) ____ that is fired at high temperatures.

A) tint
B) patterned finish
C) etching material
D) ceramic frit

Question 7

Describe chromogenic glazing materials.

Question 8

Define what is meant by the shading coefficient of glass.

Question 9

____ glass is composed of about 99 percent silicon dioxide and is the most expensive type of glass.

A) Fused silica
B) Lead-alkali-silica
C) Aluminosilicate
D) Borosilicate

Question 10

____ is part of the normal production of glass.

A) Sandblasting
B) Tempering
C) Annealing
D) Silvering

Question 11

____ glass provides clarity and visual transparency with a minimum of distortion.

A) Sheet
B) Float
C) General glazed
D) Picture

Question 12

What are the properties of low-E coatings?

Question 13

____ is the portion of incoming solar radiation that occurs in visible wavelengths.

A) Visible light transmittance
B) U-value
C) Shading coefficient
D) Total solar energy transmittance

Question 14

____ glass is used in areas where the glazing is subject to possible breakage or security of glazed openings is required.

A) Low-E
B) Laminated
C) Insulating
D) Reflective