更多"[单选题] You are underway in fog and y"的相关试题:
[单选题]?10. You are underway in heavy fog. You hear the fog signal of a vessel which is somewhere ahead of your vessel. You must ______.
A. slow to moderate speed and navigate with caution
B. maintain speed and sound the danger signal
C. stop engines and navigate with caution
D. slow to bare steerageway and navigate with caution
[单选题] Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship's whistle．This indicates ______．
A.A vessel towed
B.A vessel not under command and unable to maneuver
C.A vessel anchored giving warning of her position
D.A vessel stopped dead in the water
[单选题] A vessel sounding a fog signal of one short，one prolonged，and one short blast is indicating that the vessel is ______.
A. fishing
B. in distress
C. at anchor
D. not under command
[单选题] In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow．You should ______．
A.stop your engines
B.sound the danger signal at two-minute intervals
C.hold course and speed until the other vessel is sighted
D.take avoiding action as soon as possible
[单选题] While underway in thick fog you are on watch and hear the cry“man overboard”．Which type of maneuver should you make ________．
A.Figure eight turn
B.Round turn
C.Racetrack turn
D.Williamson turn
[单选题] If your vessel is underway in fog and you hear one prolonged and three short blasts，this is a ______．
A.vessel not under command
B.sailing vessel
C.vessel being towed（manned）
D.vessel being towed（unmanned）
[单选题]I will bring you__one.
A.an other
B.another
C.the other
D.a
[单选题] In dense fog a vessel without operational radar may not be justified ______ at all but should anchor if it is safe and practicable for her to do so．
A.to be underway
B.on under way condition
C.to stop engine
D.in being under way
[单选题] An instrument useful in predicting fog is the ______.
A. sling psychrometer
B. microbarograph
C. anemometer
D. aneroid barometer
[单选题] The fog produced by warm moist air passing over a cold surface is called ______.
A. conduction fog
B. radiation fog
C. frontal fog
D. advection fog
[单选题] 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
[单选题] When approaching a fog bank or rain squall, _________ should always be switched on.
A. VHF
B. radar
C. warning signals
D. red lights
[单选题] Fog is likely to occur when there is little difference between the dew point and the ____ .
A. relative humidity
B. air temperature
C. barometric pressure
D. absolute humidity
[单选题] What is an advantage of water fog or water spray over a straight stream of water in fighting an oil fire ________．
A.It has a smothering effect on the fire
B.It requires less water to remove the same amount of heat
C.It gives more protection to fire fighting personnel
D.All of the above
[单选题] Fog is most commonly associated with a(n) ______.
A. warm front at night
B. low pressure area
C. anticyclone
D. lack of frontal activity
[单选题] 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
[单选题] ______ is a type of fog occurring close to the sea surface when the air is dry and cold-probably at least 9℃ below the sea surface temperature．
A.MIXING FOG
B.ADVECTION FOG
C.RADIATION FOG
D.ARCTIC SEA SMOKE
[单选题] You can’t watch TV _____ you’ve finished your homework.
A. since
B. until
C. as
D. after
