航海英語船舶操縱基本知識單項(xiàng)選擇題每日一練(2019.01.21)

單項(xiàng)選擇題
Apparent wind speed blowing across a vessel under tow can be measured by a(n)（）.
A.barometer
B.wind vane
C.anemometer
D.thermometer
單項(xiàng)選擇題
The catenary（）.
A.acts as a reserve length of towing hawser when the tug applies more power，and it dampens the surge effect of the tow
B.gives an approximation of the amount of strain on the towing hawser
C.is the dip in the towing hawser between the tug and the tow
D.All of the above
單項(xiàng)選擇題
The effect known as bank cushion acts in which of the following ways on a single-screw vessel proceeding along a narrow channel? （）
A.It forces the bow away from the bank
B.It forces the stern away from the bank
C.It forces the entire vessel away from the bank
D.It heels the vessel toward the bank
單項(xiàng)選擇題
In ballasting to survival draft，while in transit，due to extreme wind and wave loads，thrusters or propulsion，if available，should be used to（）.
A.reduce windward mooring tensions
B.maintain vessel heading
C.maximize accelerations
D.increase speed of advance
單項(xiàng)選擇題
A twin-screw vessel is easier to maneuver than a single-screw vessel because the twin-screw vessel（）.
A.permits the rudder to move faster
B.generates more power
C.can turn without using her rudder
D.can suck the water away from the rudder

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