247. Which of the following statements describes how the main propulsion turbine overspeed relay initiates closing of the throttle valve?

Excessive centrifugal force causes spring loaded flyballs to actuate a control lever.
Excessive centrifugal force causes a spring-loaded weight to trip a valve latch.
Excessive speed causes an oil pump to develop sufficient pressure to open a spring-loaded relay valve which tends to close the steam control valve.
Excessive speed causes an increase in lube oil control temperature which actuates a solenoid oil dump valve.

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