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Engine : Steam Plants - 285/811
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Which of the following statements describes how the main propulsion turbine over speed relay initiates closing of the throttle valve?
A) Excessive centrifugal force causes spring loaded fly balls to actuate a control lever.
B) 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.
C) Excessive speed causes an increase in lube oil control temperature which actuates a solenoid oil dump valve.
D) Excessive centrifugal force causes a spring loaded weight to trip a valve latch.
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