更多"（）is the main center-line structura"的相关试题:
[单项选择]（）The main center-line structural member, running fore and aft along the bottom of a ship, sometimes referred to as the backbone.
A. Frame
B. Deckbeam
C. Stringer
D. Keel
[单项选择]（）is not a longitudinal structural member.
A. sideshell
B. bottom shell plating
C. inner bottom plating
D. transverse bulkhead
[单项选择]The central longitudinal structural hull strength member of the lower hulls of semisubmersible ship’s is called the（）.
A. stress plate
B. keel
C. rider plate
D. main beam
[单项选择]Vertical structural members attached to the floors that add strength to the floors are called（）.
A. boss plates
B. buckler plates
C. stiffeners
D. breast hooks
[单项选择]Compared to internal structural plating. The exterior hull plating on a vessel is usually（）.
A. stronger
B. thinner
C. more corrosion resistant
D. a lower grade steel
[单项选择]Compared to internal structural plating，the exterior hull plating on a vessel is usually（）.
A. stronger
B. thinner
C. more corrosion resistant
D. a lower grade steel
[单项选择]The athwartship hull structural members of a ship are（）.
A. stringers
B. girders
C. breasthooks
D. deck beams
[单项选择]The structural members of the hull extending in a fore and aft direction are called （）.
A. frames
B. joiners
C. longitudinals
D. knees
[单项选择]You have a computer running Windows 2000 Professional. You have purchased a new USB scanner. You attached it to the USB port. When you go to device manager to see the status of the USB port， you did not find any USB controller there. What should you do to resolve this problem？（）
A. Update the scanner drivers using certified drivers
B. Enable the USB port in the computers BIOS
C. Enable the USB hub controller in device manager.
D. Reinstall the USB device driver and disable the USB error detection
[单项选择]Structural traps are traps（）are formed because of a deformation in the rock layer （）contains the hydrocarbons.
A. that, that
B. what,what
C. what,that
D. that,what
[单项选择]Structural stress levels in a ship are the sum of loading stresses and stresses due to（）.
A. environmental loads
B. variable loads
C. ballast loading
D. mooring loads
[单项选择]Structural bulkheads on a ship are usually（）.
A. continuous
B. watertight
C. transverse
D. non-watertight
[单项选择]With reference to a vessel’s structural integrity, the most significant characteristic of a cryogenic liquid is its （）.
A. capability of causing brittle fractures
B. highly corrosive action on mild steel
C. vapor cloud which reacts violently with saltwater
D. toxicity at atmospheric pressure
[单项选择]Structural stress on a ship can be reduced by（）.
A. lessening the effect of environmental forces
B. even and symmetrical variable loading
C. local concentration of heavy consumables
D. increasing the metacentric height
[单项选择]The main purpose of changing main engine to electronic controlled is not to（）
A. control fuel injection time more precisely
B. control fuel injection rate more precisely
C. meet the environmental requirements
D. meet high engine speed requirements
[单项选择]The main purpose of warming the parts of the main engine is （）
A. to reduce heat stress
B. to reduce low temperature corrosion
C. to improve firing and starting performance
D. fuel saving
