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单选题
You are approaching a vertical lift bridge.You know the span is fully open when（）.
A
Three white lights in a vertical line are lit
B
A red light starts to flash at about 60 times a minute
C
A yellow light is illuminated on the bridge pier
D
There is a range of green lights under the lift span
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更多 “单选题You are approaching a vertical lift bridge.You know the span is fully open when（）.A Three white lights in a vertical line are litB A red light starts to flash at about 60 times a minuteC A yellow light is illuminated on the bridge pierD There is a range of green lights under the lift span” 相关考题
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考题
单选题Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.A
Cargo whipB
Gooseneck fittingC
Spider bandD
Topping lift
考题
单选题You are underway and approaching a bend in the channel where vessels approaching from the opposite direction cannot be seen．You should sound（）.A
one blast，4 to 6 seconds in durationB
three blasts，4 to 6 seconds in durationC
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one blast，8 to 10 seconds in duration
考题
单选题You are about to cross a narrow channel when you see an approaching vessel that can only be navigated safely within the channel.You should（）.A
cross the channel as you are the stand-on vesselB
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考题
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考题
单选题作为一名值班水手，你必须懂得如何调整吊杆。（）A
As an officer on duty, you must know how to adjust derricks.B
As a sailor on duty, you must know how to adjust derricks.C
As a sailor on duty, you must know how to operate cranes.D
As an officer on duty, you must know how to operate cranes.
考题
单选题When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.A
Arch the back to add strength to the musclesB
Bend his knees and lift with his legsC
Bend his back and stoopD
Bend his back and stoop with arms straight
考题
单选题Risk of collision may exist（）.A
if the compass bearing of an approaching vessel does not appreciably changeB
even when an appreciable bearing change is evident, particularly when approaching a vessel at close rangeC
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考题
单选题With a given load on the cargo hook，tension in a single span topping lift（）.A
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decreases as the boom's angle to the horizontal decreases
考题
单选题How would you pass a red buoy in the maritime buoyage system“A” （）.A
keep the buoy on the vessel's starboard side when approaching a port and on the vessel's port side when leavingB
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keep the buoy on the vessel's starboard side when approaching and leavingD
keep the buoy on the vessel's port side when approaching and leaving
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