单项选择题

A.a helicopter carrying cargo onlyB.a turbine-equipped ……

The only type of helicopter that may be refueled with the engine running and the blades turning is（）.

A.a helicopter carrying cargo only
B.a turbine-equipped helicopter
C.a Sikorsky
D.a helicopter carrying injured personnel in an emergency situation

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单项选择题The most likely location for a liquid cargo fire to occur on a tanker would be（）.

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B.at the main deck manifold
C.at the vent header
D.in the pumproom

单项选择题The major cause of anchor buoy pendant wire failures is（）.

A.corrosion
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A.advance
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单项选择题The distance a vessel moves parallel to the original course from the point where the rudder is put over to any point on the turning circle is called the（）.

A.advance
B.drift angle
C.pivoting point
D.transfer

单项选择题The distance a vessel moves at right angles to the original course，when a turn of 180°has been completed，is called the（）.

A.advance
B.pivoting point
C.tactical diameter
D.kick