Which risk increases when a hydroelectric generator's over-speed protection fails during a penstock blockage?

💡 Explanation

The risk of runaway speed increases massively because without the over-speed protection activating the mechanical circuit breaker, the turbine accelerates unchecked due to the water flow, therefore exploding mechanically, rather than controlling the rotational speed.

• Which outcome occurs when the inductive reactance dominates in a power transformer's secondary circuit?
• Which outcome occurs in a pneumatic actuator when supply pressure exceeds the actuator's design limits?
• Which outcome occurs when desiccant filter drier saturates in an HVAC refrigerant loop?
• Which risk increases in an underwater acoustic transducer experiencing prolonged high-intensity sound projection near the cavitation threshold?
• Which mechanism causes signal degradation in optical fibers operating near 1550 nm?
• Which pitot-static system failure causes inaccurate airspeed during descent?