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What is the normal maximum interval for above water routine inspections? correct answers 24
months
What is the normal maximum interval for underwater routine inspections? correct answers 60
months
What are the factors that require a shorter interval for routine underwater inspections? correct
answers Age, condition, aggressive environment, channel instability
What should be the scope of a routine underwater inspection? correct answers 100% level 1,
10% level 2, scour assessment
What is the NBI and what does it contain? correct answers National Bridge Inventory, list of
bridges
When must multiple culverts be considered as bridges? correct answers When the out to out
dimension of the bridge extends 20 ft.
What are the three categories of loads bridges are subjected to? correct answers Dead load, live
load, secondary load
What is the purpose of a foundation seal? correct answers To seal bottom of cofferdam during
construction of substructure
For an in-service bridge, when is the condition of the seal important? correct answers When the
substructure element is on a spread footing
List 3 underwater inspection methods. correct answers Wading, diving, advanced technologies
, What dive safety regulations does the NBIS require be followed? correct answers None, only
OSHA requires dive regulations
Name four types of underwater inspections correct answers Initial, routine, interim, damage
What is the purpose of a hazard analysis? correct answers Identify and mitigate hazards
Name three methods of mitigating hazards. correct answers Operational methods, equipment
choices, avoidance of hazard
In assembling an underwater bridge inspection team, what personnel qualifications should be
considered? correct answers Inspection qualifications and diving qualifications
Name two types of corrosion. correct answers electrochemical, MIC
Name three elements necessary for electrochemical corrosion. correct answers Flow of electrical
current, electrolyte, oxygen
What is the most severe waterfront zone for corrosion? correct answers Splashzone
Name two areas in a corrosion cell correct answers Anode, cathode
Which area is sacrificial (corrodes) and which one is protected? correct answers Anode-corrodes,
cathode-protected
Name two sources for the current flow in corrosion. correct answers External current, dissimilar
metals
What is the normal maximum interval for above water routine inspections? correct answers 24
months
What is the normal maximum interval for underwater routine inspections? correct answers 60
months
What are the factors that require a shorter interval for routine underwater inspections? correct
answers Age, condition, aggressive environment, channel instability
What should be the scope of a routine underwater inspection? correct answers 100% level 1,
10% level 2, scour assessment
What is the NBI and what does it contain? correct answers National Bridge Inventory, list of
bridges
When must multiple culverts be considered as bridges? correct answers When the out to out
dimension of the bridge extends 20 ft.
What are the three categories of loads bridges are subjected to? correct answers Dead load, live
load, secondary load
What is the purpose of a foundation seal? correct answers To seal bottom of cofferdam during
construction of substructure
For an in-service bridge, when is the condition of the seal important? correct answers When the
substructure element is on a spread footing
List 3 underwater inspection methods. correct answers Wading, diving, advanced technologies
, What dive safety regulations does the NBIS require be followed? correct answers None, only
OSHA requires dive regulations
Name four types of underwater inspections correct answers Initial, routine, interim, damage
What is the purpose of a hazard analysis? correct answers Identify and mitigate hazards
Name three methods of mitigating hazards. correct answers Operational methods, equipment
choices, avoidance of hazard
In assembling an underwater bridge inspection team, what personnel qualifications should be
considered? correct answers Inspection qualifications and diving qualifications
Name two types of corrosion. correct answers electrochemical, MIC
Name three elements necessary for electrochemical corrosion. correct answers Flow of electrical
current, electrolyte, oxygen
What is the most severe waterfront zone for corrosion? correct answers Splashzone
Name two areas in a corrosion cell correct answers Anode, cathode
Which area is sacrificial (corrodes) and which one is protected? correct answers Anode-corrodes,
cathode-protected
Name two sources for the current flow in corrosion. correct answers External current, dissimilar
metals
