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单选题
A flashing light is a light that（）.
A
flashes at regular intervals at a frequency of 120 flashes or more per minute
B
is yellow in color
C
is visible over an arc of the horizon of not less than 180°nor more than 225°
D
All of the above
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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 channelB.indicates a danger areaC.is used to identify the characteristics of the lightD.serves no significant purpose
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A light used to signal passing intentions must be an ______.A.all-round yellow light onlyB.all-round white light onlyC.all-round blue light onlyD.alternating red and yellow light
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A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the ______.A.north side of the markB.west side of the markC.east side of the markD.south side of the mark
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A user reports that the computer’s hard drive is constantly running and the hard drive light is constantly flashing. Which of the following tools would be used to resolve this issue without losing data?（）A、chkdskB、fdiskC、defragD、format
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单选题An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.A
blue rotating lightB
intermittent flashing amber/yellow lightC
flashing white lightD
flashing sidelight
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单选题A preferred-channel buoy will show a（）.A
white light whose characteristic is Morse (A)B
group-occulting white lightC
composite group-flashing (2 + 1) white lightD
composite group-flashing (2 + 1) red or green light
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单选题A message by flashing light consists of the call，the text，the ending，and the（）.A
identityB
time of originC
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procedure code
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单选题A towing light is a yellow light having the same characteristics as a(n)（）A
special flashing lightB
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单选题At 1920，the buoy forward of your starboard beam is（）.A
an interrupted quick flashing buoyB
Hog Island Lighted Bell BuoyC
South Light BuoyD
Sand Shoal Inlet Lighted Buoy A
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单选题As you approach mile 659.4 AHP，you see on the right descending bank a flashing green light. This light marks（）.A
a lock that is openB
a sunken bargeC
a dolphin，water intake and dischargeD
the end of a wharf
考题
单选题A flashing green light displayed at a single lock means that the lock is（）.A
ready for entranceB
ready for entrance，but gates cannot be closed completelyC
being made ready for entranceD
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单选题A buoy with a composite group-flashing light indicates a(n)（）.A
bifurcationB
fish net areaC
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单选题A bridge over a navigable waterway is being repaired. There is a traveller platform under the bridge’s deck that significantly reduces the vertical clearance. If required by the CG district commander，how will this be indicated at night?（）A
Illumination by flood lightsB
A quick flashing red light at each lower cornerC
A strobe light visible both up and downstreamD
Fixed amber lights under the extreme outer edges of the traveller
考题
单选题A buoy having red and green horizontal bands would have a light characteristic of（）.A
group occultingB
composite group flashingC
Morse letter AD
quick flashing
考题
单选题What is the light characteristic of a lighted，preferred-channel buoy? （）A
Group flashingB
Composite group flashingC
Interrupted quick flashingD
Fixed and flashing
考题
单选题A message by flashing light consists of the call，the identity，the ending，and the（）.A
replyB
textC
timeD
answer
考题
单选题A vessel trawling will display a（）.A
red light over a white lightB
green light over a white lightC
yellow light over a red lightD
white light over a green light
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单选题打开锚灯！ （）A
Switch on the deck light!B
Switch on the anchor light!C
Switch on the cargo light!D
Switch on the hold light!
考题
单选题An all-round flashing yellow light may be exhibited by a(n)（）.A
vessel not under commandB
air cushion vessel in the nondisplacement modeC
vessel towing a submerged objectD
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考题
单选题You have berthed in a area with other tank vessels. What signal is displayed by a vessel to indicate it is transferring flammable or combustible liquid cargo?（）.A
A flashing yellow lightB
A red light visible all around the horizonC
A green light visible all around the horizonD
An illuminated red and yellow caution flag
考题
单选题Which statement concerning Montauk Point Light is TRUE（）.A
The light comes on at sunsetB
There is an emergency light if the main light is extinguishedC
The height of the light is 24 feetD
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考题
单选题How is a safe water mark，that can be passed close aboard on either side，painted and lighted?（）A
Black and white stripes with an interrupted quick flashing lightB
Black and red stripes with a Morse (A) lightC
Black and red stripes with an interrupted quick flashing lightD
Red and white stripes with a Morse (A) light
考题
单选题On navigational aids，what does the light characteristic Fl(2+1) mean?（）A
A flashing light combined with a fixed light of greater brightnessB
Light flashes combined in groups，with a different number of flashes in each groupC
A light showing groups of two or more flashes at regular intervalsD
A fixed light varied at regular intervals by groups of two or more flashes of greater brightness
考题
单选题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 channelB
Indicates a danger areaC
Is used to identify the characteristics of the lightD
Serves no significant purpose
考题
单选题A light characteristic of composite group flashing indicates that there is a(n)（）.A
sharp turn in the channelB
narrowing in the channel at that pointC
junction in the channelD
obstruction that must be left to port
考题
单选题An all-round flashing yellow light may be exhibited by a(n)（）.A
vessel laying cableB
vessel towing a submerged objectC
vessel not under commandD
air cushion vessel
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