航海英语航海学基本知识章节练习(2017.09.21)

单项选择题
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
A.dike
B.revetment
C.cutoff
D.crib
单项选择题
A spherical buoy may be（）.
A.numbered
B.lettered
C.green
D.red
单项选择题
A mid-channel buoy，if lighted，will show a（）.
A.fixed red light
B.Morse (A) white light
C.green light
D.flashing red light
单项选择题
A lighthouse can be identified by its（）.
A.painted color
B.light color and phase characteristic
C.type of structure
D.All of the above
单项选择题
A line of position formed by sighting two charted objects in line is called a(n)（）.
A.relative bearing
B.range line
C.track line
D.estimated position
单项选择题
A gnomonic projection is based on a(n)（）.
A.plane tangent at one point
B.cylinder tangent at the equator
C.cone tangent at one parallel
D.infinite series of cones tangent at selected parallels
单项选择题
（）is the distance east or west measured in degrees，minutes and seconds of arc on the equator between the prime meridian and the meridian passing through the place.
A.Longitude
B.Latitude
C.Height
D.Bearing
单项选择题
A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A.wingdam
B.towhead
C.cutoff
D.landwall
单项选择题
How is the intensity of a light expressed in the Light Lists?（）.
A.Luminous range
B.Geographic range
C.Nominal range
D.Meteorological range
单项选择题
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A.the equator
B.a great circle
C.a small circle
D.a meridian