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CGSB VISUAL TESTING (VT) LEVEL 2 QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS) Q &
A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary objective of visual testing (VT)? A. Detect internal flaws B. Measure hardness C. Identify surface discontinuities D. Determine chemical composition Rationale: VT is mainly used for surface defect detection. Answer: C 2. Which tool enhances visual inspection accuracy? A. Thermometer B. Magnifying glass C. Hydrometer D. Tachometer Rationale: Magnification improves defect visibility. Answer: B 3. VT is classified under which NDT method? A. Volumetric B. Surface C. Magnetic D. Radiographic
Rationale: VT detects surface conditions only. Answer: B
4. Direct visual testing requires: A. Computer imaging B. Direct line of sight C. Radiation source D. Magnetic field Rationale: Direct VT needs visual access. Answer: B 5. Indirect VT uses: A. Mirrors and cameras B. Chemical reagents C. Electrical current D. Ultrasonic waves Rationale: Indirect VT uses optical aids. Answer: A 6. The most common defect detected by VT is: A. Subsurface voids B. Surface cracks C. Atomic defects D. Grain structure
Rationale: Borescopes access confined spaces. Answer: B
10. VT is most effective on: A. Transparent liquids B. Surface-accessible parts C. Radioactive materials D. Gas mixtures Rationale: VT requires visible surfaces. Answer: B 11. Surface roughness affects VT by: A. Improving chemical bonding B. Hiding defects C. Increasing density D. Changing color Rationale: Rough surfaces may mask flaws. Answer: B 12. A limitation of VT is: A. Requires radiation B. Only surface inspection C. High cost D. Requires vacuum
Rationale: VT cannot detect internal flaws. Answer: B
13. VT is often used as: A. Final inspection method B. Primary NDT screening tool C. Chemical test D. Mechanical test Rationale: VT is quick and preliminary. Answer: B 14. A crack perpendicular to surface is: A. Always visible B. Harder to detect C. Magnetic only D. Not relevant Rationale: Orientation affects visibility. Answer: B 15. Shadowing in VT occurs due to: A. Excess heat B. Poor lighting angles C. Radiation D. Vibration
Rationale: VT is widely used industrially. Answer: A
19. A surface discontinuity is: A. Internal void B. Crack or scratch C. Grain boundary only D. Phase change Rationale: It appears on surface. Answer: B 20. VT cannot detect: A. Weld defects B. Surface cracks C. Internal porosity D. Corrosion Rationale: Internal flaws are invisible. Answer: C 21. Weld inspection using VT checks for: A. Electrical resistance B. Surface discontinuities C. Density D. Elasticity
Rationale: VT evaluates weld surface quality. Answer: B
22. A key VT advantage is: A. Requires no equipment B. Fast and economical C. Detects all flaws D. Requires radiation Rationale: VT is low-cost and quick. Answer: B 23. VT inspection quality improves with: A. Poor lighting B. Training C. Blind inspection D. Heat Rationale: Skilled inspectors improve accuracy. Answer: B 24. Indirect VT is used when: A. Surface is painted B. Direct access is available C. Material is radioactive D. No tools needed
Rationale: VT does not damage material. Answer: B
28. A discontinuity is best defined as: A. Material improvement B. Loss of material continuity C. Heat increase D. Magnetic field Rationale: It interrupts structure. Answer: B 29. VT is most sensitive to: A. Surface-breaking defects B. Internal cracks C. Atomic structure D. Electrical current Rationale: Surface flaws are visible. Answer: A 30. Cleanliness of surface affects VT by: A. Increasing hardness B. Improving visibility C. Changing density D. Creating defects
Rationale: Clean surfaces reveal defects better. Answer: B
31. VT documentation includes: A. Chemical analysis B. Inspection reports C. Radiation graphs D. Stress curves Rationale: Records are required for quality control. Answer: B 32. A borescope is primarily used in: A. External inspection B. Confined space inspection C. Chemical testing D. Pressure testing Rationale: It accesses internal areas. Answer: B 33. VT is least effective for: A. Weld inspection B. Surface cracks C. Internal porosity D. Corrosion detection
Rationale: Visibility is reduced. Answer: B
37. VT inspection should be done: A. Randomly B. Systematically C. Blindly D. Chemically Rationale: Structured inspection ensures reliability. Answer: B 38. VT is used in welds to detect: A. Electrical faults B. Cracks and porosity C. Radiation D. Chemical composition Rationale: Surface weld defects are visible. Answer: B 39. A limitation of VT is: A. High accuracy internal detection B. Dependence on visibility C. Chemical dependency D. Magnetic requirement
Rationale: Visibility is essential. Answer: B
40. VT inspection reliability depends on: A. Inspector skill B. Material color only C. Weight D. Temperature Rationale: Human interpretation is key. Answer: A 41. VT inspection reports must include: A. Chemical composition B. Findings and observations C. Radiation dosage D. Hardness values Rationale: VT reports document visual findings only. Answer: B 42. A crack filled with debris is: A. Easier to see B. Harder to detect C. Magnetic only
D. Phase change Rationale: It is open to surface. Answer: B
46. VT is most affected by: A. Operator eyesight B. Magnetic field C. Radiation D. Pressure Rationale: Human vision is critical. Answer: A 47. The purpose of lighting angle is to: A. Reduce cost B. Enhance defect contrast C. Heat material D. Magnetize object Rationale: Proper angle improves visibility. Answer: B 48. Indirect VT is necessary when: A. Surface is accessible B. Direct line of sight is blocked C. Material is transparent
D. No defect exists Rationale: Tools are needed for hidden areas. Answer: B
49. A mirror in VT primarily helps with: A. Heat reflection B. Viewing hidden surfaces C. Measuring hardness D. Chemical testing Rationale: It improves viewing access. Answer: B 50. Fiber optic borescopes are used for: A. External polishing B. Internal inspection C. Welding D. Painting Rationale: They inspect confined spaces. Answer: B 51. VT cannot reliably detect: A. Surface cracks B. Corrosion C. Internal voids
D. It changes structure Rationale: VT is quick and effective for surface weld defects. Answer: B
55. A well-trained VT inspector must have: A. Chemical knowledge only B. Good visual acuity C. Radiation skills D. Welding certification only Rationale: Vision and interpretation are key. Answer: B 56. Surface roughness can: A. Hide defects B. Improve strength C. Remove cracks D. Change density Rationale: Rough surfaces mask flaws. Answer: A 57. VT documentation is important for: A. Legal and quality records B. Chemical analysis C. Welding speed
D. Magnetic strength Rationale: It ensures traceability. Answer: A
58. VT is considered: A. Destructive testing B. Non-destructive testing C. Chemical testing D. Mechanical testing Rationale: It does not damage parts. Answer: B 59. The main VT tool for magnification is: A. Microscope B. Thermometer C. Caliper D. Tachometer Rationale: Magnification helps defect detection. Answer: A 60. Shadowing in VT occurs due to: A. Excess heat B. Improper lighting direction C. Magnetic flux
