Which consequence results when investment casting shell cracks prior to firing?

💡 Explanation

A shell crack allows molten metal to penetrate irregularly because capillary action overcomes surface tension, resulting in increased surface roughness, therefore, the finish degrades rather than improves dimensional aspects or cooling characteristics.

• Which risk increases when an internal combustion engine runs with inadequately balanced crankshaft?
• Which risk increases when an inverter's flyback diode current limit is exceeded?
• Which outcome occurs when circulating currents overheat three-phase transformer conductors?
• Which bias condition prevents current flow across a diode junction?
• Which outcome occurs when a transformer cools asymmetrically after operating near its thermal limits?
• Which outcome occurs when lubricating oil viscosity is too low in a positive displacement pump?