The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.

[单选题]E．ach ship shall carry on board a ship security plan approved byA．the chief engineer officerB．the master of the shipC．the manager of the companyD．the Administration

[单选题]E．ach ship shall carry on board a ship security plan approved by______.A．the chief engineer officerB．the master of the shipC．the manager of the companyD．the Administration

[单选题]Compressed air is used on board ship （）.A . for starting diesel enginesB . in pneumatic control systemC . in pneumatic toolsD . All the above are true

[判断题]Time chartering covers a situation where a ship is employed to carry aparti

[单选题]Structural stress on a ship can be reduced by（）.A . lessening the effect of environmental forcesB . even and symmetrical variable loadingC . local concentration of heavy consumablesD . increasing the metacentric height

[单选题]Many businesses ship their products by rail if they are shipping longdistan

[单选题]Many businesses ship their products by rail if they are shipping long dista

[单选题]A mere touch at the wall of the cabin can _____ the astronauts flying about

[单选题]G．ear pumps are widely used to transfer any one of the following but .A．fuel oilB．lube oilC．hydraulic oilD．fresh water

[单选题]The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than _____ of the total bilge pumping capacity.A．one-thirdB．two-thirdsC．one-fourthD．two-fourths