Quiz Questions: |
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| 1. |
This course describes about the inspection, evaluation, and repair of hydraulic steel structures, including pre-inspection identification of critical locations (such as fracture critical members and various connections) |
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True |
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False |
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| 2. |
Corrosion can seriously weaken a structure or impair its operation, so the effect
of corrosion on the strength, stability, and serviceability of hydraulic steel structures must be evaluated.
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True |
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False |
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| 3. |
What are the factors that can contribute to fracture and weld-related cracking in hydraulic steel structures? |
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Material properties |
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Welding influences |
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Thick plates |
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All of the above. |
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| 4. |
Fatigue is known as the process of cumulative damage caused by repeated cyclic loading. |
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True |
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False |
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| 5. |
Proper operation and maintenance of hydraulic steel structures are necessary to prevent structural deterioration. |
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True |
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False |
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| 6. |
What are the primary steps that are to be considered necessary to perform a periodic inspection adequately? |
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Preinspection assessment |
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Inspection |
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Evaluation |
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Recommendations |
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All of the above |
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| 7. |
For the results of an inspection to be worthwhile, the inspector must be qualified. |
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True |
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False |
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| 8. |
What are the qualifications necessary for individuals to inspect welds adequately? |
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A welding inspector must be familiar with engineering drawings and able to interpret specifications. |
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False
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A welding inspector should be familiar with welding processes and welding procedures.
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A welding inspector should be able to maintain adequate records.
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A welding inspector should have passed an eye examination with or without corrective lenses to prove near-vision acuity of Snellen English, or equivalent, at 300 mm (12 in.), and far-vision acuity of 20/40, or better.
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All of the above.
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| 9. |
Material information that may be required to evaluate a steel structure includes chemical composition, tensile strength, bend ductility, fillet weld shear strength, hardness, and fracture toughness. |
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True |
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False |
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| 10. |
Tension tests provide information on the strength and ductility of materials under uniaxial tensile stress. |
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True |
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False |
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| 11. |
Hardness measurements provide indications of metallurgical changes caused by welding, metallurgical variations, and abrupt microstructural discontinuities in weld joints, brittleness, and relative sensitivity to cracking under structural loads. |
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True |
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False |
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| 12. |
Fracture toughness testing provides a measure of resistance to fracture of a material. |
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True |
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False |
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| 13. |
Structural evaluation is the process of determining the capability of a structure to perform its intended function. |
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True |
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False |
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| 14. |
Traditional member/frame structural analysis or even finite element methods can be used to evaluate the effect of reduction in sections from corrosion damage. |
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True |
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False |
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| 15. |
The type of structural repair details selected will be determined considering the following factors. |
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Cause of damage. |
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Remaining service life of the structure./p> |
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Frequency and type of future inspections. |
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Construction constraints. |
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All of the above. |
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| 16. |
The primary means to avoid corrosion is by providing a protective coating system. |
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True |
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False |
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| 17. |
The appropriate method for repairing cracks in a given situation is dependent on the size and location of the crack and the type of detail at which the cracking occurs. |
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True |
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False |
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| 18. |
The general guidelines for a welded crack repair are as follows:
- Clean area and determine extent of crack with dye penetrant testing.
- Drill hole at crack tip location.
- Gouge out crack and prepare joint as a full-penetration groove weld in accordance with
ANSI/AWS D1.1.
- Preheat and weld joint using runout tabs and backing as required per American National Standards Institute/American Welding Society (ANSI/AWS) D1.1.
- Remove backing and runout tabs.
- Grind weld smooth.
- Ream hole to remove weld metal and smooth edges.
- Verify removal of crack tip with dye penetrant testing.
- Inspect weld with appropriate nondestructive testing
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True |
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False |
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| 19. |
The general guidelines for a welded crack repair are as follows:
- Determine extent of crack with dye penetrant testing.
- Drill hole at crack tip location.
- Verify removal of crack tip with dye penetrant testing.
- Prepare and install bolted repair over the crack.
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True |
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False |
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| 20. |
Peening is effective as a retrofit for shallow surface cracks that commonly occur at fillet weld toes. |
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True |
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False |
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