We’ve explored how sudden temperature changes can affect glass performance, safety, and durability in our recent blog posts. Now it’s time to put that knowledge to the test and see how well you really understand thermal shock in glass containers.Take our fun quiz, see how many answers you can get right, and maybe even learn a few new facts along the way!How It Works
- Pick A, B or C for each question
- Your score is revealed at the end
Quiz Time
Q1 Why does glass experience thermal shock?
A) Because glass is too thin
B) Because glass conducts heat too quickly
C) Because glass conducts heat poorly
D) Because glass contains air bubbles
Correct Answer: C
Why: Poor thermal conductivity creates temperature gradients through the wall thickness.
Q2 When hot glass is suddenly cooled, what stress develops at the surface?
A) Compressive
B) Tensile
C) Neutral
D) Shear
Correct Answer: B
Why: The surface cools and contracts faster, placing it in tension.
Q3 Which type of stress most often causes glass to fracture?
A) Compressive
B) Tensile
C) Flexural
D) Torsional
Correct Answer: B
Q4 Which stress state develops inside the glass during rapid surface cooling?
A) Tensile
B) Compressive
C) Neutral
D) Shear
Correct Answer: B
Q5 A cold bottle is filled with hot liquid. Where does the most dangerous tensile stress form?
A) On the outer surface
B) Inside the core
C) At the base only
D) At the neck only
Correct Answer: A
Q6 Why is the base and heel region especially vulnerable to thermal shock?
A) It cools fastest
B) It is thinner
C) It experiences combined thermal and bending stresses
D) It has more air bubbles
Correct Answer: C
Q7 Where do hot-fill thermal shock failures most commonly initiate?
A) Bottle shoulder
B) Neck finish
C) Outside base corners
D) Centre of sidewall
Correct Answer: C
Q8 Which crack pattern is commonly linked to thermal shock?
A) Spiral cracking
B) Starburst shatter
C) Vertical body cracks
D) Random chipping
Correct Answer: C
Q9 Why should failed containers be retained after breakage?
A) For recycling verification
B) For insurance records
C) To identify stress distribution and failure origin
D) To confirm filling volume
Correct Answer: C
Q10 Which combination best reduces thermal shock failures?
A) Higher pressure and thicker walls
B) Lower fill temperature and improved base design
C) Faster cooling and sharper heels
D) Increased carbonation and thinner bases
Correct Answer: B
Scoring
• 0–3 → Glass Beginner
• 4–6 → Glass Explorer
• 7–9 → Thermal Shock Pro
• 10 → Glassworks Engineer Level
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