A(n) ______ is used to control the speed of the turbine as steam is channeled through the restrictive component called the nozzle.
a. governor
b. trip and throttle valve
c. thrust bearing
d. overspeed trip
a. Correct. The governor is a device used to control the speed of the turbine.
b. Incorrect. The trip and throttle valve is the inlet steam valve that is designed to be used to throttle the turbine and to shut down the turbine in the event of excess rotational speed or vibration.
c. Incorrect. Radial/thrust bearings are bearings designed to support and hold the rotor in place while offering minimum resistance to free rotation.
d. Incorrect. The overspeed trip mechanism is an automatic safety device designed to remove power from a rotating machine if it reaches a preset trip speed.
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