Engine 2014: Steam Plants

1. A gagging the safeties
2. B removing the safety valves in order to perform the  hydrostatic test
3. C a test pressure of less than 1 1/2 times the maximum allowable working pressure if testing a water-tube boiler
4. D the auxiliary stop valve from simultaneously having hydrostatic pressure on one side of the valve and steam pressure on the other side

Tip: press A-D to answer