The turbine overspeed trip:
1. prevents the turbine from vibrating
2. prevents the turbine exceeding the maximum rated speed
3. is operated by a spring loaded pin in the rotating blades
4. will close the steam stop valve
5. should be tested before the turbine is placed in service
a) 2, 4, 5
b) 2, 3, 4, 5
c) 1, 2, 4
d) 3, 4, 5
e) 4, 5
Answer: A