When the derrick is lowered, the guys must be （）.

A、slacked off

B、taken in

C、send away

D、send out

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更多“When the derrick is lowered, the guys must be （）.”相关的问题

第1题

[] 吊杆停用时，稳索必须要收起来。（）

A、A. When the derrick is stopped, the guy must be stowed. B、B. When the derrick is stopped, the guy must be topped. C、C. When the derrick is stopped, the guy must be lowered. D、D. When the guy is stopped, the derrick must be stowed.

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第2题

[单选题] When the union purchase derrick is operated, one derrick is positioned over the quayside and the other almost vertically over the （）.

A、dock B、hold C、pedestal D、machinery space

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第3题

[单选题] 起货机出故障时，水手要去叫电工来修理。（）

A、When the windlass is in trouble, the sailor must go and call the electrician to repair it. B、When the derrick is in trouble, the sailor must go and call the electrician to repair it. C、When the winch is in trouble, the sailor must go and call the electrician to repair it. D、When the winch is in trouble, the sailor must go and call the carpenter to repair it.

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第4题

[单选题] 这个吊杆的安全工作负荷是6吨。（）

A、The SWL of the derrick is five tons. B、The SWL of the heavy derrick is six tons. C、The SWL of the derrick is six tons. D、The SWL of the crane is six tons.