Rhythm
Period
Intensity
Color
第1题:
A mobile offshore drilling unit must display obstruction lights when it is on the waters over the Outer Continental Shelf and is ______.
A.under tow
B.fixed to the seabed
C.underway
D.All of the above
第2题:
A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights ______.
A.are not the same color as either side light
B.have a lesser range of visibility than the prescribed lights
C.do not impair the visibility or distinctive character of the prescribed lights
D.All of the above
第3题:
Restricted areas at locks and dams are indicated by ______.
A.flashing red lights upstream and fixed red lights downstrem
B.yellow unlighted buoys
C.signs and / or flashing red lights
D.red daymarks upstream and green daymarks downstream
第4题:
第5题:
If several fixed navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?______.
A.Rhythm
B.Period
C.Intensity
D.Color
第6题:
Many navigational warnings are of a temporary nature,but others remain in force for several months or may be succeeded by ______.
A.Notices to Mariners
B.Sailing Directions
C.List of Lights and Signals
D.Guide to Port Entries
第7题:
A vessel is approaching from dead ahead.Both of her sidelights are visible and her range lights are in line. Which of the following could you do first? ______.
A.Sound one blast of the whistle
B.Alter course to starboard
C.Construct a radar plot
D.Sound the danger signal
第8题:
Ink-jet printer belongs to nonimpact printers in which the characters are formed by projecting particles or droplets of ink on to paper.(71) printer is also a nonimpact printer in which the characters are produced by applying hot elements to heat-sensitive paper directly or by melting ink from a(72) on to plain paper. Electrostatic printer creates an electrostatic latent image, which is then made visible by a toner and transferred and fixed on paper. An electrostatic printer may be used in some instances as a(73). Laser printer creates, by means of a laser beam directed on a(74) surface, a latent image which is then made visible by a toner and transferred and fixed on paper. Magnetographic printer creates, by means of magnetic heads operating on a metallic drum, a latent image which is then made visible by a toner and transferred and fixed on paper. Computer-output-microfilm (COM) printer produces on a photographic film a(75) of each page.
A.Hot
B.Warm
C.Heat
D.Thermal
第9题:
第10题: