航海英语STCW公约的有关内容单项选择题每日一练(2017.10.02)

单项选择题
What is the best instrument for establishing a safe working area before welding in a confined space? （）
A.An oxygen indicator
B.A combustible gas indicator
C.A combination combustible gas and oxygen indicator
D.A flame safety lamp
单项选择题
You are a watch standing mate and have come to the bridge to relieve the watch while underway at sea.The watch should not be transferred（）.
A.During an engine speed change
B.During a navigational course change
C.Unless the helm is in the“hand”mode
D.All of the above
单项选择题
A passenger vessel is underway. When may passengers visit the pilothouse? （）
A.Passengers are excluded from the pilothouse while underway
B.Passengers are permitted in the pilothouse during daylight hours only
C.Passengers are permitted to visit the pilothouse when authorized by the Master and officer of the watch
D.Passengers are permitted in the pilothouse when they are escorted by a ship's officer
单项选择题
The upward slope of a vessels bottom from the keel to the bilge is called（）.
A.camber
B.sheer
C.rake
D.rise of bottom
单项选择题
While you are on watch entering port，the Master gives the helmsman a rudder command which conflicts with a rudder command from the Pilot.You should make sure the helmsman（）.
A.Obeys the Pilot
B.Obeys the Master
C.Asks you for instructions
D.Brings the rudder to a point midway between the two conflicting positions