单项选择题
Main engine room control console alarms are to be of the self monitoring type, meaning that an open circuit to a particular alarm circuit will （）
A.cause an alarm condition B.secure power to the indicator C.secure power to the monitored device D.automatically recluse within 10 seconds
单项选择题 At which of the following locations would a duplex pressure gage most likely be located?（）
单项选择题 The function of lubricating oil is to （）
单项选择题 Main propulsion engine lube oil sumps should be constructed （）
