Q81: Perferring design with dished shape instead of flat head is... - Process Equipment Design - Dairy Engineering- ICAR JRF/SRF 2024 | Agrigyan

• Pressure Vessel Head Geometry and Corrosion Prevention:
• Dished heads (torispherical or ellipsoidal) avoid abrupt $90^\circ$ geometry transitions, eliminating stagnant crevice accumulation zones and mitigating localized stress concentrations.
• Examination Answer Key: Option 3 (Anodic and cathodic protection) is designated as the credited answer in the official examination key, while structurally representing mechanical engineering design to prevent localized stress corrosion.
• Conclusion: Anodic and cathodic protection (Option 3).

Correct option: (3) Anodic and cathodic protection