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单选题
When a wind force causes a floating ship to heel to a static angle，the（）.
A
centers of buoyancy and gravity are in the same vertical line
B
righting moment equals the wind-heeling moment
C
downflooding point is below water
D
deck-edge immersion occurs
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考题
In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to ().A.heel until the angle of loll is reachedB.list until the center of buoyancy is aligned vertically with the center of gravityC.trim to the side opposite TCG until all moments are equalD.decrease draft at the center of flotation
考题
The numeral in the center of a wind rose circle on a pilot chart indicates the ______.A.total number of observationsB.average wind force on the Beaufort scaleC.average wind force in knotsD.percentage of calms
考题
When is the density of the water required to be logged in the logbook of a ship?A.Any time the vessel moves from water of one density into waters of a different densityB.Prior to getting underway when the vessel is floating in fresh or brackish waterC.Only when the vessel moves from fresh water into salt waterD.The density of the water is not required to be logged in the unofficial logbook
考题
Among the possible causes of unexpected constant inclination of the floating ship is ______．A.Consumption of on board liquidsB.Miscalculation of loadsC.Liquid transfer through open valvesD.Flooding due to hull damage
考题
When a wind force causes a floating ship to heel to a static angle，the ______．A.Centers of buoyancy and gravity are in the same vertical lineB.Righting moment equals the wind-heeling momentC.Downflooding point is below waterD.Deck-edge immersion occurs
考题
The velocity of the apparent wind can be more than the true wind，and come from the same direction，if certain conditions are present．One condition is that the ______．A.Ship's speed must be less than the true wind velocityB.True wind must be from dead asternC.True wind velocity must be faster than the ship's speedD.True wind must be from dead ahead
考题
______is the number of millimeters by which the mean draft changes when a ship passes from salt water to fresh water，or vice versa，whilst floating at the loaded draft．A.TPCB.The Fresh Water AllowanceC.Parallel sinking of the shipD.UKC
考题
For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force ______.A.only when there is positive stabilityB.only when there is negative stabilityC.only when there is neutral stabilityD.at all times
考题
有时风大流急，船舶靠码头时必须掉头顶流。（）A、A ship has to turn to stem the tide because the wind is strong when she is getting alongside a wharf.B、Sometimes the wind is strong and the current is rough, so a ship has to turn to stem the tide when she is getting alongside a wharf.C、The wind is big, a ship must get alongside a wharf so she has to turn to stem the tide.D、A ship has to turn to stem the tide so she can get alongside a wharf.
考题
单选题If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.A
require ballastB
be down by the headC
sinkD
float
考题
单选题A ship will always want to settle into a position where（）.A
the pivot point and point of influence of wind in are not in alignmentB
the pivot point and point of influence of wind in are in alignmentC
the point of influence of wind moves depending on the profile of the ship presented to the windD
the ship steams slowly in rough seas
考题
单选题When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.A
reduce the time the sounding tube is openB
avoid creating a sparkC
lessen the effect of roll or pitch on the readingD
lessen the effect of heave on the reading
考题
单选题When will the float-free emergency position indicating radio beacon be activated after abandoning ship?（）A
Immediately after floating freeB
After about one hour when the salt water activates the batteryC
Only when keyed by the radar of another vesselD
Only when daylight activates the photovoltaic cell
考题
单选题When the ship causes oil pollution to the port, she will be（）.A
finedB
leviedC
paidD
deducted
考题
单选题The apparent wind can be zero when the true wind is from（）.A
ahead and equal to the ship's speedB
astern and equal to the ship's speedC
ahead and equal to twice the ship's speedD
astern and equal to twice the ship's speed
考题
单选题If the buoyant force on a ship’s hull is equal to the displacement tonnage, the ship cause（）.A
require ballastB
be down by the headC
sinkD
float
考题
单选题In rough weather，when a ship is able to maneuver，it is best to launch a lifeboat（）.A
on the lee sideB
on the windward sideC
with the wind dead aheadD
with the wind from astern
考题
单选题A twin-screw vessel with a single rudder is making headway. The engines are full speed ahead. There is no wind or current. Which statement is FALSE?（）.A
If one screw is stopped，the ship will turn toward the side of the stopped screwB
The principal force which turns the ship is set up by the wake against the forward side of the rudderC
Turning response by use of the rudder only is greater than on a single-screw vesselD
With the rudder amidships，the ship will steer a fairly steady course
考题
单选题When force of winds reaches 10-11 in Beaufort scale，we usually call such wind（）.A
GaleB
StormC
HurricaneD
Typhoon
考题
单选题For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force（）.A
only when there is positive stabilityB
only when there is negative stabilityC
only when there is neutral stabilityD
at all times
考题
单选题When evacuating a seaman by helicopter lift，which course should the ship take?（）A
Downwind so that the apparent wind is close to nilB
A course that will keep a free flow of air，clear of smoke，over the hoist areaC
A course that will have the hoist area in the lee of the superstructureD
With the wind dead ahead because the helicopter is more maneuverable when going into the wind
考题
单选题When is the density of the water required to be logged in the logbook of a ship?（）A
Any time the vessel moves from water of one density into waters of a different densityB
Prior to getting underway when the vessel is floating in fresh or brackish waterC
Only when the vessel moves from fresh water into salt waterD
The density of the water is not required to be logged in the unofficial logbook
考题
单选题The numeral in the center of a wind rose circle on a pilot chart indicates the （）.A
total number of observationsB
average wind force on the Beaufort scaleC
average wind force in knotsD
percentage of calms
考题
单选题The centre of lateral resistance is（）.A
the center of the hydrodynamic forces acting on the underwater hull to resist the effect of the windB
the point of influence of wind on the shipC
the pivot pointD
the point on the ship's above-water structure upon which the whole force of the wind can be considered an act
考题
单选题When turning a ship in restricted space with a strong wind，it is normally best to（）.A
Go ahead on both engines with the rudder hard to one side，if on a twin-screw vesselB
Back down with the rudder hard to one side，if on a single-screw vesselC
Take advantage of the tendency to back to port，if on a twin-screw vesselD
Turn so that the tendency to back into the wind can be used，if on a single-screw vessel
考题
单选题有时风大流急，船舶靠码头时必须掉头顶流。（）A
A ship has to turn to stem the tide because the wind is strong when she is getting alongside a wharf.B
Sometimes the wind is strong and the current is rough, so a ship has to turn to stem the tide when she is getting alongside a wharf.C
The wind is big, a ship must get alongside a wharf so she has to turn to stem the tide.D
A ship has to turn to stem the tide so she can get alongside a wharf.
考题
单选题When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）A
Immediately after floating freeB
After about one hour when the salt water activates the batteryC
Only when keyed by the radar of another vesselD
Only when daylight activates the photovoltaic cell
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