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【单选题】
如 F/2 的光束直径为 50mm ,则 F/4 的光束直径为A.
100mm
B.
75mm
C.
25mm
D.
17mm
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举一反三
【单选题】Under Port State Control (PSC), in general, ships will not be inspected within _____ of a previous inspection in an MOU Port, unless there are clear grounds for inspection.
A.
one year
B.
two months
C.
. six months
D.
one month
【单选题】The conventions under which the port state control inspection is carried out include all the following except ______.
A.
SOLAS 74
B.
MARPOL 73/78
C.
STCW 78/95
D.
ISM Code
【单选题】Under the provisions of applicable international conventions, the officers to conduct port state control inspection must be duly authorized by ______.
A.
the company
B.
the Government of the country
C.
the organization recognized by the Administration
D.
the IMO
【单选题】International Ship Security certificate, ISSC for short, will be checked during Port State Control
A.
Port State Control will issue ISSC
B.
Port State Control will update ISSC
C.
Port State Control will inspect ISSC
D.
Flag State Control will inspect ISSC
【简答题】两腔面积相差很大的单杆缸用二位四通阀换向。有杆腔进油时,无杆腔回油流量很大,为避免使用大通径二位四通阀,可用一个液控单向阀分流,请画回路图。
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