海船船员考试

单选题A mechanical davit is designed to automatically（）.A position the boat at the embarkation stationB lift the boat off the inboard chocksC energize the winch for the fallsD set the brake on the winch

题目
单选题
A mechanical davit is designed to automatically（）.
A

position the boat at the embarkation station

B

lift the boat off the inboard chocks

C

energize the winch for the falls

D

set the brake on the winch

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相似问题和答案

第1题：

grammar practice is usually divided into two categories, _______________.

A. meaningful drilling and communicative drilling

B. mechanical drilling and meaningful drilling

C. mechanical practice and meaningful practice

D. meaningful practice and communicative practice


正确答案是:C

第2题：

When the prime movers of two paralleled generators are equipped with mechanical-hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will .

A.pick up more of any increase in load

B.pick up less of any increase in load

C.share an equal amount of any increase in load

D.drop an equal amount of any decrease in load


正确答案：A

第3题：

MEMS的英文名称是()

A.MECHANICAL-ELECTRO-MICROSYSTEMS

B.MICRO-ELECTRO-MECHANICALSYSTEMS

C.MICRO-MECHANICAL-ELECTROSYSTEMS

D.ELECTRO-MICRO-MECHANICALSYSTEMS


参考答案：B

第4题：

Which davit type may be operated by one man ________．

A.Quadrantal

B.Gravity

C.Sheath-screw

D.Radial


正确答案：B

第5题：

While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the ______．

A.Davit arm to pivot on the traveling nut and the head to fall outboard

B.Traveling nut to lock up in place on the worm gear

C.Limit switch to engage and hold the traveling nut in position

D.Winch brake to lock in position and prevent lowering the boat


正确答案：A

第6题：

grammar pratice is usually dividied into two categories:_________________.

A、mechanical drilling and meaningful drilling

B、mechanical practice and meaningful practice

C、meaningful drilling and communcative drilling

D、meaningful practice and communicative practice


参考答案：B

第7题：

Which device is designed to automatically hold the load if power should fail to an electric winch?

A.Pneumatic brake

B.Electromagnetic brake

C.Hand brake

D.Motor controller


正确答案：B

第8题：

机械性传播(mechanical transmission)


正确答案：有些医学节肢动物对病原体的传播作用仅起携带。输送的作用，病原体在节肢动物的体表或体内均无数量和形态上的变化，这种传播方式称为机械性传播。

第9题：

The most common type of davit found on merchant vessels today is the ______．

A.Radial

B.Sheath-screw

C.Gravity

D.Quadrantal


正确答案：C

第10题：

Which type of davit is not considered to be a mechanical davit ________．

A.Sheath-screw boom

B.Radial

C.Crescent

D.Quadrantal


正确答案：B

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