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How to blow glass
Contributed by: Sadler
  • 1. What is the primary material used in glassblowing?
A) Plastic
B) Metal
C) Clay
D) Molten Glass
  • 2. What is the name of the long, hollow pipe used to gather molten glass?
A) Punt
B) Shears
C) Marver
D) Blowpipe
  • 3. What is the approximate temperature at which glass is workable for blowing?
A) 3000°F (1649°C)
B) 500°F (260°C)
C) 1000°F (538°C)
D) 2000°F (1093°C)
  • 4. What is the process of rolling the molten glass on a flat surface called?
A) Annealing
B) Shaping
C) Marvering
D) Gathering
  • 5. What is the purpose of annealing?
A) Relieve internal stresses
B) Make the glass more brittle
C) Add color
D) Increase the melting point
  • 6. What type of furnace is used to melt glass?
A) Microwave
B) Oven
C) Glory Hole
D) Kiln
  • 7. What is a punt?
A) A solid metal rod used to hold the glass
B) A type of glass
C) A tool for cutting glass
D) A coloring agent
  • 8. What tool is commonly used for shaping and opening the glass?
A) Hammers
B) Jacks
C) Tweezers
D) Screwdrivers
  • 9. What is a 'gather' in glassblowing?
A) A type of furnace
B) A broken piece of glass
C) A blob of molten glass collected on the blowpipe
D) A finishing technique
  • 10. Which safety precaution is most important in glassblowing?
A) Ear protection
B) Eye protection
C) Open-toed shoes
D) Gloves
  • 11. What is the purpose of a reheating chamber (glory hole)?
A) To keep the glass workable.
B) To polish the glass.
C) To cool the glass quickly.
D) To add color to the glass.
  • 12. What does 'cold working' refer to?
A) Rapidly cooling glass
B) Modifying glass after it has cooled
C) Working with cold glass
D) Working in a cold environment
  • 13. Which of these is a common glassblowing technique?
A) Off-hand blowing
B) Laser cutting
C) Cold welding
D) Water casting
  • 14. What is the chemical composition of soda-lime glass?
A) Plastic, sand, and salt
B) Silica, soda ash, and lime
C) Metal, carbon, and iron
D) Clay, water, and fire
  • 15. What is the purpose of compressed air in glassblowing?
A) To clean the workshop.
B) To inflate the glass bubble.
C) To cool the tools.
D) To heat the glass.
  • 16. What is 'striking' in the context of glass coloring?
A) Adding color to the glass
B) Removing color from the glass
C) Developing the color through heat treatment
D) Mixing different colors of glass
  • 17. What is the term for adding small pieces of colored glass (frit) to molten glass?
A) Inclusion
B) Fritography
C) Layering
D) Murrine
  • 18. What does 'devitrification' refer to?
A) The process of glass melting.
B) The process of glass becoming clear.
C) The process of glass becoming stronger.
D) The process of glass becoming crystalline.
  • 19. What is 'slumping'?
A) A method of cleaning glass.
B) A type of glass color.
C) Breaking glass intentionally.
D) Shaping glass using gravity and heat.
  • 20. What is the main difference between soft glass and borosilicate glass?
A) Soft glass melts at a lower temperature.
B) Soft glass is more durable
C) They're the same thing.
D) Borosilicate has a lower coefficient of expansion.
  • 21. What is a 'cane' in glassblowing?
A) A mold for shaping glass
B) Rods of colored glass used to create patterns
C) A safety device
D) A type of glass cleaner
  • 22. Which of these is NOT a common glassblowing tool?
A) Soldering Iron
B) Diamond Shears
C) Tweezers
D) Block
  • 23. What is 'color flashing'?
A) Rapidly changing the color of glass
B) Applying a thin layer of colored glass over clear glass
C) Cleaning glass to make it shiny
D) Heating glass to make it flash
  • 24. What is the function of a 'Yoke'?
A) Cuts the glass
B) Supports the blowpipe
C) Heats the glass
D) Cleans the glass
  • 25. Why is it important to keep the blowpipe rotating?
A) To maintain even distribution of glass
B) To make the glass shinier
C) To make the glass stronger
D) To prevent the glass from cracking
  • 26. What is 'iridizing'?
A) Removing color from glass
B) Making glass transparent
C) Strengthening the glass
D) Creating a metallic, rainbow-like effect on the surface of glass
  • 27. What type of gloves are generally recommended for glassblowing?
A) Heat-resistant gloves
B) Leather gloves
C) Latex gloves
D) No gloves are needed
  • 28. What is a 'bit' in glassblowing?
A) A type of colorant
B) A type of tool
C) A broken piece of glass
D) A small piece of glass added to the main form
  • 29. What is the benefit of using borosilicate glass over soda-lime for certain applications?
A) Cheaper
B) Easier to melt
C) Brighter colors
D) Higher thermal shock resistance
  • 30. What is a 'muster' in glassblowing terminology?
A) A type of mold
B) A tool to measure the heat of the glass
C) The process of cleaning a furnace
D) A detailed plan or design for a glass piece.
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