Which critical mold defect in investment casting leads to dimensional inaccuracies?

💡 Explanation

Shell distortion during burnout causes dimensional inaccuracies because it alters the mold cavity's shape before metal is introduced through gravity casting. Therefore, the casting reproduces the distorted mold rather than the intended geometry because of thermal expansion rather than alloy chemistry influence.

• Which outcome occurs when a large industrial three-phase induction motor operates under sustained undervoltage conditions?
• Which outcome occurs during high-speed lathe machining of hardened steel if coolant delivery is insufficient?
• Which consequence results when joint angle sensors fail in inverse kinematics calculation for a welding robot arm?
• Which risk increases when optical fibers exceed their modal bandwidth capacity in wavelength division multiplexing (WDM) systems?
• Which risk increases when improperly compacted concrete surrounds a vertical steel support column during construction?
• Which consequence results when valve timing fails in an engine?