Question

When starting up a small non-condensing steam turbine you should always _________ once the turbine is properly warmed up and the governor has taken over control of the turbines speed:

Select one:
a. manually test the overspeed trip
b. check the valve line up
c. reset the overspeed trip
d. open the casing drain traps

Answer 1

Once a small non-condensing steam turbine is warmed up and under the control of the governor, a manual test of the overspeed trip is essential for confirming the turbine's safety mechanisms are operational.

Step-by-step explanation:

When starting up a small non-condensing steam turbine, you should always manually test the overspeed trip once the turbine is properly warmed up and the governor has taken over control of the turbine's speed. This safety measure ensures that the turbine will shut down in the event that it operates above its designed speed, potentially preventing damaging and unsafe conditions. The process involves a safety protocol where the turbine's overspeed trip mechanism is manually activated to confirm it operates correctly. In contrast, the valve lineup would have been checked prior to startup, the overspeed trip would only be reset if it had been tripped, and the casing drain traps are typically opened during the warming process rather than after the governor takes control.