Lec 06 After STM3163 sem 1 24-25 19.11.24

The tests is commonly used to assess the strength of glass packaging:

• Compression Test
• Thermal Shock Test
• Drop Test
• Chemical Resistance Test

What does the thermal shock test measure in glass packaging?

• The sound produced when glass packaging is tapped.
• The ability of glass packaging to withstand rapid temperature changes.
• The color intensity of glass packaging.
• The weight of glass packaging under pressure.

Which tests is used to measure the clarity of glass packaging?

• Strength test
• Color measurement test
• Blurry measurement test

• Transparency test

The basic chemical structure of glass is primarily composed of a network of:

• sodium carbonate (Na2CO3)
• calcium oxide (CaO)
• silica (SiO2)
• aluminum oxide (Al2O3)

Which of the following elements is used in glass formulations to lower the melting temperature?

(a)  

Which mechanical property of glass determines how much force it can withstand before breaking under pressure?

• Flexural strength
• Compressive strength
• Tensile strength
• Shear strength

Glass is considered brittle because it has:

• a flexible structure with weak ionic bonds
• a porous structure with metallic bonds
• a rigid structure with strong covalent bonds
• a liquid structure with hydrogen bonds

Glass is considered brittle because it has:

• High ductility

• Low tensile strength

• Low flexibility

• High impact resistance

The thermal property that makes glass packaging suitable for high-temperature applications is:

• High thermal stability
• High thermal expansion
• Low thermal conductivity
• Poor heat resistance

coefficient of thermal expansion (CTE) is

• A calculation of the density of a material.
• An indicator of the electrical conductivity of a material.
• A measure of the temperature of a material.
• A measure of the change in size of a material in response to a change in temperature.