更多"Dacron sails，when not in use，may be"的相关试题:
[单项选择]Canvas sails，when not in use，may be damaged if（）.
A. left in the sunlight
B. stowed wet
C. folded frequently
D. washed with soap and water
[单项选择]When may the automatic identification system (AIS) be switched off? （）
A. At anytime as long as it is properly logged
B. At the Master's professional judgment
C. Only when the vessel is at anchor or in port
D. Under no circumstance
[单项选择]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]On a ship，when may a work vest be substituted for a required life preserver?（）
A. To replace a damaged life preserver
B. For use during fire drills
C. For use during boat drills
D. At no time
[单项选择]For GMDSS，when may a compulsory vessel not be allowed to leave port?（）
A. When the vessel is in an overloaded condition
B. When the vessel has arranged for both duplication of equipment AND shore-based maintenance
C. When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged
D. When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functions
[单项选择]On an OSV，when may a work vest be substituted for a required life jacket?（）
A. To replace a damaged life jacket
B. For use during fire drills
C. For use during boat drills
D. At no time
[单项选择]May I use your dictionary? （）
A. Yes, here you are
B. No, you won't
C. Never mind
D. Sorry here it is
[单项选择]When should you use distress flares and rockets?（）
A. Only when there is a chance of their being seen by rescue vessels
B. At half-hour intervals
C. At one-hour intervals
D. Immediately upon abandoning the vessel
[单项选择]The ARPA may swap targets when automatically tracking if two targets（）.
A. are tracked on reciprocal bearings
B. are tracked at the same range
C. are tracked on the same bearing
D. pass close together
[单项选择]Which of the following problems may occur when using fuel oil with a high sulphur content?（）
A. Injection lag
B. Lube oil dilution
C. Pre-ignition
D. Corrosion
[单项选择]What material may be substituted for zinc when making a poured metal socket ending to a wire rope（）.
A. Lead
B. Babbitt
C. Solder
D. Nothing
[单项选择]The officer of the watch should use radar when appropriate and at all times in（）waters.
A. congesting
B. congested
C. congestion
D. congest
[单项选择]Vessels in port may use（）for receiving typhoon warnings during the typhoon season.
A. their transmitters
B. their receivers
C. their radars
D. their lorans
[单项选择]A vessel may use any sound or light signals to attract the attention of another vessel as long as（）.
A. white lights are not used
B. red and green lights are not used
C. the signal cannot be mistaken for a signal authorized by the Rules
D. the vessel signals such intentions over the radiotelephone
[单项选择]A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）
A. A flashing amber light
B. A fixed red light
C. A white flag raised and lowered vertically
D. A flashing white light
[单项选择]You may use the hospital（）you clean it up afterward.
A. as far as
B. as well as
C. as soon as
D. so long as
