更多"Full details of all lights and fog "的相关试题:
[单项选择]Uncharted lights, fog signals and radar beacon transmissions may be（）near the station.
A. encountered
B. met
C. contacted
D. seen
[单项选择]Uncharted lights，fog signals and radar beacon transmissions may be（）near the station.
A. encountered
B. met
C. contacted
D. seen
[单项选择]All fog signals shall be sounded every two minutes with the exception of a vessel（）.
A. underway or making way
B. under sail or under tow
C. anchored or aground
D. not under command or restricted in her ability to maneuver
[单项选择]Sometimes lights are（）by fog，haze，dust，smoke，or precipitation which may be present at the light，or between the light and the observer，and which is possibly unknown by the observer.
A. obscured
B. darkened
C. greyed
D. delighted
[单项选择]Navigation lights must be displayed in all weathers from sunset to sunrise. They also（）.
A. must be displayed when day signals are being used
B. must be displayed when moored to a pier
C. may be extinguished at night on open waters when no other vessels are in the area
D. may be displayed during daylight
[单项选择]The all-purpose nozzle will produce a fog spray when you（）.
A. pull the nozzle handle all the way back toward the operator
B. pull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzle
C. push the nozzle handle forward as far as it will go
D. insert a fog applicator between the fire hose and nozzle
[单项选择]Water fog from an all-purpose nozzle may be used to（）.
A. fight an electrical fire
B. fight a magnesium fire
C. eliminate smoke from a compartment
D. All of the above
[单项选择]Which kind of fog is also named as ground fog?（）
A. Advection
B. Radiation fog
C. frontal fog
D. Steam fog
[单项选择]Radiation fog（）.
A. always forms over water
B. is formed by a temperature inversion
C. is thinnest at the surface
D. dissipates during the evening
[单项选择]High-velocity fog（）.
A. is a finer，more diffuse water spray than low-velocity fog
B. requires that the water pressure be no greater than 60 psi
C. produces an effective fog pattern no more than 6 feet beyond the nozzle
D. extinguishes a fire by absorbing heat and reducing the supply of oxygen
[单项选择]Immediately after abandoning a vessel，lookouts should be posted aboard liferafts to look for（）.
A. survivors in the water
B. food and water
C. land
D. bad weather
[单项选择]According to the relevant regulation, lifeboat should be powered by（）.
A. inboard diesel engine
B. outboard diesel engine
C. outboard gasoline engine
D. inboard gasoline engine
[单项选择]Fog forms when the air（）.
A. Is 50% water saturated
B. Is 90% water saturated
C. Temperature is greater than the dew point temperature
D. Temperature is equal to，or below the dew point temperature
[单项选择]Which instrument is most useful in forecasting fog（）.
A. A barometer
B. An anemometer
C. A sling psychrometer
D. A pyrometer
[单项选择]Advection fog holds longest over which portions of the lakes?（）
A. Northwest
B. Southeast
C. Northeast
D. Southwest
[单项选择]When launching a lifeboat，the tricing pennants should be released（）.
A. before the boat is lowered from the stowed position
B. as the boat-fall blocks break clear of the davit head
C. before the boat is lowered from the embarkation level
D. after the boat is released into the water
