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单选题
Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?（）
A
clean the flame scanner photocell window
B
Inspect and clean all solenoid valves
C
lift the safety valves by hand
D
Inspect for oil or water leaks
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svmon -wC
schedtune -wD
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Open the crankcase immediately to check for damageB
Apply fire fighting water through the crankcase breatherC
Allow the engine to cool before opening the crankcaseD
Assume that there is no damage to the crankshaft
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