Glassworking

 Besides helping to preserve the environment, the use of recycled glass as an ingredient of the starting material in glassmaking serves what other useful purpose?

• adds coloring variations to the glass for aesthetic value

• makes the glass easier to melt

• makes the glass stronger

• reduces odors in the plant

 The charge in glassworking is which one of the following?

• the duration of the melting cycle

• the electric energy required to melt the glass

• the name given to the melting furnace

• the starting materials in melting

 Typical glass melting temperatures are in which of the following ranges?

• 400°C to 500°C

• 900°C to 1000°C

• 1500°C to 1600°C

• 2000°C to 2200°C

 Casting is a glassworking process used for

• high production

• low production

• medium production

• batch production

Answer explanation

Answer. Casting is used in glassworking for large components like giant telescope lenses in small lot sizes. It is a slow process for these large products.

 Which one of the following processes or processing steps is not applicable in glassworking?

• annealing

• pressing

• quenching

• sintering

• spinning

Answer explanation

Sintering is used to cause bonding of particulate materials such as metal and ceramic powders.

Is the following statement true or false? "The press-and-blow process is best suited to the production of (narrow-necked) beverage bottles, while the blow-and-blow process is more appropriate for producing (wide-mouthed) jars"

(a)  

Answer explanation

False. It's the reverse.

 Which one of the following processes is used to produce glass tubing?

• Danner process

• pressing

• rolling

• spinning

 Molten glass is also known as:

• body

• gob 

• lump

• mass

 What is the preform before the formation of final glass jar called?

• mold

• gob

• tube

• parison

 Which forming method is used for the production of hollow glass?

• Blowing

• Pressing

• Drawing

• Casting