99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<pre id="kvcv7"><legend id="kvcv7"><s id="kvcv7"></s></legend></pre>

<pre id="kvcv7"><strong id="kvcv7"></strong></pre>

<ruby id="kvcv7"></ruby>

單項選擇題

Which action(s) should the operator of a pedestal crane take if crane control is lost?（）

A.Let go of both control levers and return to neutral position
B.Press the emergency stop
C.Notify the mate on watch
D.All of the above

你可能感興趣的試題

單項選擇題

Which action(s) is/are included in crane operations?（）

A.Normal boom stowage and shutdown operations
B.Emergency shutdown operation
C.Removing booms from stowage
D.All of the above

單項選擇題

Where must the 0mster or person in charge of a ship record the date of each test of emergency lighting and power systems and the condition and performance of the equipment?（）

A.On the Certificate of Inspection
B.On the Muster List ("Station Bill")
C.In the Operations Manual
D.In either the official or unofficial log