單項(xiàng)選擇題

What does “evel-luffing” accomplish during crane operations（）.

A.It prevents the load from swinging when the boom level is adjusted
B.Less power is needed when topping the boom with a load on the hook
C.It maintains the height of the load above the deck
D.All of the above

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單項(xiàng)選擇題

They（）loading at 1400 hours．

A.started
B.finished
C.completed
D.reported

單項(xiàng)選擇題

The net productivity per gang-hour can be improved through a decrease of（）.

A.Cranes/derricks
B.Crane/derrick cycles
C.Crane/derrick cycle time
D.Weight per package

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What does “evel-luffing” accomplish during crane operations（）.

你可能感興趣的試題

They（）loading at 1400 hours．

The net productivity per gang-hour can be improved through a decrease of（）.

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