航海英语问答题每日一练(2020.03.26)

单项选择题
The Loran needs（）.
A.repairing
B.to repair
C.repairs
D.have repaired
单项选择题
When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is（）.
A.water in the tanks or pipelines
B.having the cargo too cool
C.explosion of vapors after discharge
D.inadequate ullage space
单项选择题
A vessel is equipped with cross-connected deep tanks.In which situation should the crossconnection valve be closed?（）.
A.The tank lie above the waterline and are filled
B.The tank are partically filled with dry cargo
C.The tanks are partially filled with liquid cargo
D.The tanks are filled and lie below the waterline
单项选择题
When compared to air temperature,which factor is most useful in predicting fog?（）
A.Vapor pressure
B.Dew point
C.Barometric pressure
D.Absolute humidity
单项选择题
（）the vessel have no safety radiotelegraphy certificate at the time of her delivery，she（）be held to be unseaworthy．
A.If／may
B.Will／shall
C.Should／would
D.Would／should