Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← TechnologyWhich risk increases when casting molten metal around a hydrothermally unstable core?
A)Bridging defects become more probable
B)Thermal expansion will create voids
C)Porosity from gas evolution increases✓
D)Chemical segregation creates alloy banding
💡 Explanation
Higher temperatures provoke decomposition, a process called thermal decomposition, in hydrothermal cores creating additional gas. Because the solubility of gas decreases with cooling temperature, porosity from gas evolution increases with unstable core material rather than material of low binding energy; therefore it increases porosity.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Technology →- Which outcome occurs when inductive current flows into a transmission line?
- Which risk increases during robotic arm path planning when inverse kinematic solutions are extremely close?
- Which safety outcome occurs when pressure-relief valve discharge line experiences excessive backpressure?
- Which outcome occurs when a refrigeration system compressor uses a refrigerant with high moisture content?
- Which outcome occurs when temperature increases rapidly within a pneumatic actuator?
- Which outcome occurs when rapid over-correction by anti-islanding protection on a distributed generation circuit breaker precipitates a cascading event?
