单项选择题
A.refreshing the air B.making person upset C.adjusting the air humidity D.adjusting the air temperature
The oil discharge monitoring system in the oil tanker v...
单项选择题The oil discharge monitoring system in the oil tanker vessels is used for detecting the amount of oil discharged overboard to ensure that it does not exceed（）
A.15 liters nautical mile B.30 liters nautical mile C.60 liters nautical mile D.100 liters nautical mile
To receive oil residues from the purification of fuel a...
单项选择题To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?（）
A.bilge tank B.sludge tank C.overflow tank D.oil collecting tank
Which cause of following will not lead to refrigeration...
单项选择题Which cause of following will not lead to refrigeration plant short-cycle?（）
A.lack of refrigerant B.refrigerant with much water C.set defectively low pressure relay D.no cooling water
