更多"Structural traps are traps（）are for"的相关试题:
[单项选择]Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）
A. Ball float
B. Thermostatic
C. Bimetallic
D. Impulse
[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]If a man is easily taken in by emotional traps, he will not be able to make（）judgments.
A. sensitive
B. sentimental
C. sensible
D. sensational
[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]（）is not a longitudinal structural member.
A. sideshell
B. bottom shell plating
C. inner bottom plating
D. transverse bulkhead
[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]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]（）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]Cumulonimbus clouds are formed by（）.
A. vertical air movements
B. heavy rainstorms
C. horizontal air movements
D. any movement of moist air
[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 lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the（）.
A. flash point
B. fire point
C. upper explosive limit
D. lower explosive limit
[单项选择]Condensate formed within the first-effect tube nest of a double-effect,low pressure evaporator, is removed by a （）.
A. series of baffles
B. crossover pipe
C. condensate separator
D. drain pump
