What is displacement criteria?

• A. Engagement criteria
• B. Operational criteria
• C. Displacement criteria
• D. Bypass criteria

Answer: (C)

Displacement criteria set the limits on movement from a component’s intended position. They define how far a part, connection, or assembly may shift, tilt, or deflect before it’s considered out of tolerance and needs adjustment or repair. This helps ensure proper alignment, fit, and function under operating conditions like vibration, thermal expansion, or seismic events. For example, a displacement limit might specify only a few millimeters of movement between connected parts, or a maximum angular deviation for a shaft, so seals stay in contact and components don’t bind. Other criteria address engagement, normal operation, or bypass conditions, which relate to different aspects of how the system behaves rather than to positional change itself.