更多"What is the light characteristic of"的相关试题:
[单项选择]The characteristic of a lighted cardinal mark may be （）.
A. very quick flashing
B. flashing
C. fixed
D. occulting
[单项选择]On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector.The red sector（）.
A. Indicates the limits of the navigable channel
B. Indicates a danger area
C. Is used to identify the characteristics of the light
D. Serves no significant purpose
[单项选择]The four standard light colors used for lighted aids to navigation are red，green，white，and （）.
A. purple
B. orange
C. blue
D. yellow
[单项选择]The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel（）.
A. ascending the river
B. descending the river
C. crossing the river
D. proceeding towards sea
[单项选择]A mooring buoy，if lighted，shows which color light?（）
A. Yellow
B. White
C. Blue
D. Any color except red or green
[单项选择]A light characteristic of composite group flashing indicates that there is a(n)（）.
A. sharp turn in the channel
B. narrowing in the channel at that point
C. junction in the channel
D. obstruction that must be left to port
[单项选择]What is a lighted safe water mark fitted with to aid in its identification（）.
A. A spherical topmark
B. Red and white retroreflective material
C. A sequential number
D. A red and white octagon
[单项选择]What is a characteristic of all centrifugal cargo pumps? （）
A. They are self-priming
B. Decreasing the speed of rotation will decrease the discharge pressure
C. Opening the discharge valve wider will increase the discharge pressure
D. All of the above
[单项选择]What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）
A. Effective even if ventilation is not shut down
B. Will not deteriorate in storage
C. Non-corrosive
D. Effective on electrical equipment
[单项选择]What is the most important characteristic of the extinguishing agent in fighting a class C fire?（）
A. Weight
B. Temperature
C. Electrical nonconductivity
D. Cost
[单项选择]On a light tow，what could you substitute for a fishplate?（）
A. heart-shaped shackle
B. pelican hook
C. swivel
D. ring
[单项选择]On navigational aids，what does the light characteristic Fl(2+1) mean?（）
A. A flashing light combined with a fixed light of greater brightness
B. Light flashes combined in groups，with a different number of flashes in each group
C. A light showing groups of two or more flashes at regular intervals
D. A fixed light varied at regular intervals by groups of two or more flashes of greater brightness
[单项选择]Lighted information markers show（）.
A. green lights
B. red lights
C. yellow lights
D. white lights
[单项选择]Lighted white and orange buoys must show which color light?（）
A. Orange
B. White
C. Red
D. Alternating yellow and white
[单项选择]The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.
A. Set
B. Frequency
C. Period
D. Function
[单项选择]The period of a lighted aid to navigation refers to the（）.
A. date of construction or establishment
B. length of time between flashes of the light
C. time required for the longest flash of each cycle
D. time required for the light to complete each cycle
[单项选择]A lighted preferred-channel buoy may show a（）.
A. fixed red light
B. Morse (A) white light
C. composite group-flashing light
D. yellow light
[单项选择]A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）
A. Flashing
B. Morse A
C. Equal interval
D. Occulting
[单项选择]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
