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CGSB VISUAL TESTING (VT) LEVEL 1 QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS) Q &
A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of Visual Testing (VT) in NDT? A. Measure material hardness B. Detect surface discontinuities C. Determine chemical composition D. Measure electrical conductivity Rationale: VT is used to identify visible surface defects such as cracks, corrosion, and misalignment. Correct Answer: B 2. Which of the following is required for effective visual inspection? A. Radiation source B. Clean surface C. Magnetic field D. Ultrasonic probe Rationale: A clean surface ensures defects are visible without obstruction. Correct Answer: B 3. VT is mainly classified as which type of testing?
A. Volumetric B. Surface C. Destructive D. Chemical Rationale: VT detects only surface-breaking or visible discontinuities. Correct Answer: B
4. What is a common limitation of Visual Testing? A. Requires radioactive material B. Only detects internal defects C. Limited to surface defects D. Requires vacuum conditions Rationale: VT cannot detect subsurface flaws. Correct Answer: C 5. Which tool is commonly used to enhance VT? A. Caliper B. Magnifying glass C. Thermometer D. Barometer Rationale: Magnification helps detect small surface defects. Correct Answer: B
9. VT is most effective when performed: A. Before fabrication only B. During and after fabrication C. Only after failure D. Only in laboratory conditions Rationale: VT is used at multiple production stages. Correct Answer: B 10. Which defect is NOT detectable by VT? A. Misalignment B. Cracks C. Internal voids D. Corrosion Rationale: Internal voids are subsurface. Correct Answer: C 11. What is the role of VT in welding inspection? A. Measure weld chemistry B. Detect surface weld defects C. Change weld properties D. Heat treatment
Rationale: VT identifies weld surface discontinuities. Correct Answer: B
12. Which of the following improves VT accuracy? A. Poor lighting B. Clean and dry surface C. Dirty surface D. High humidity only Rationale: Clean surfaces reduce false indications. Correct Answer: B 13. VT is considered: A. Non-destructive testing method B. Destructive testing method C. Chemical analysis D. Radiographic method Rationale: VT does not damage the component. Correct Answer: A 14. A discontinuity in VT refers to: A. Perfect surface B. A break or interruption in material
A. Measuring hardness B. Internal visual inspection C. Chemical testing D. Welding Rationale: Borescopes inspect internal or hard-to-reach areas. Correct Answer: B
18. Which defect is associated with poor welding technique? A. Surface crack B. Magnetic flux C. Radioactivity D. Density increase Rationale: Poor welding often causes surface cracks. Correct Answer: A 19. VT inspection results are highly dependent on: A. Inspector eyesight and experience B. Material color only C. Electricity D. Radiation intensity Rationale: Human judgment is critical in VT. Correct Answer: A
20. What should be done before VT inspection? A. Heat the material B. Clean the surface C. Apply radiation D. Freeze the material Rationale: Surface cleaning ensures accurate inspection. Correct Answer: B 21. VT is commonly used in: A. Medical imaging B. Manufacturing and welding inspection C. Nuclear fusion D. DNA testing Rationale: VT is widely used in industrial inspection. Correct Answer: B 22. Which is a direct VT method? A. Using camera only B. Direct line-of-sight inspection C. Ultrasonic scanning D. Radiography Rationale: Direct VT uses unaided eye observation. Correct Answer: B
Rationale: VT is simple, fast, and inexpensive. Correct Answer: B
26. Which factor most affects visual acuity during VT? A. Surface temperature B. Lighting conditions C. Magnetic field D. Radiation level Rationale: Proper lighting directly affects what the inspector can see. Correct Answer: B 27. What is the purpose of VT in quality control? A. Modify material properties B. Identify visible defects early C. Increase hardness D. Heat treatment Rationale: VT ensures defects are detected early in production. Correct Answer: B 28. Which is an example of indirect VT? A. Naked eye inspection B. Using a mirror C. Touch testing D. Chemical analysis
Rationale: Mirrors allow viewing of hidden areas. Correct Answer: B
29. VT is most commonly applied in: A. Structural welding inspection B. DNA sequencing C. Blood analysis D. Gas chromatography Rationale: VT is widely used in weld inspection. Correct Answer: A 30. A surface discontinuity refers to: A. Internal void B. Visible flaw on surface C. Chemical change D. Magnetic flux Rationale: It is a break on or breaking the surface. Correct Answer: B 31. Which tool helps inspect internal pipe surfaces? A. Thermometer B. Borescope
A. Low intensity B. Adequate white light C. Colored light D. Flickering light Rationale: White light improves defect visibility. Correct Answer: B
35. VT inspection is performed by: A. Robots only B. Human eye or optical aid C. X-ray machines D. Ultrasonic waves Rationale: VT relies on visual observation. Correct Answer: B 36. What is the function of a magnifying lens in VT? A. Detect internal cracks B. Improve surface detail visibility C. Change material structure D. Measure hardness Rationale: Magnification enhances small defect detection. Correct Answer: B
37. VT is classified under: A. Destructive testing B. Non-destructive testing C. Chemical testing D. Thermal testing Rationale: VT does not damage the component. Correct Answer: B 38. Which is NOT a VT application? A. Weld inspection B. Crack detection C. Chemical composition analysis D. Surface corrosion detection Rationale: Chemical analysis is not VT. Correct Answer: C 39. What does VT rely on most? A. Radiation B. Human eyesight C. Electricity D. Magnetism Rationale: VT is based on visual perception. Correct Answer: B
Rationale: Internal inclusions are not visible. Correct Answer: C
43. Proper VT requires: A. Dark room B. Good illumination C. Magnetic field D. Radiation source Rationale: Lighting is essential for inspection. Correct Answer: B 44. VT is commonly used in: A. Aircraft inspection B. Software testing C. Chemical synthesis D. Genetics Rationale: VT is widely used in aerospace inspection. Correct Answer: A 45. Which defect is visible during VT? A. Internal crack B. Surface crack
C. Atomic defect D. Grain boundary only Rationale: Surface cracks are visible to the eye. Correct Answer: B
46. VT inspection results depend on: A. Inspector skill B. Chemical reaction C. Radiation intensity D. Electrical flow Rationale: Experience affects accuracy. Correct Answer: A 47. VT is most effective when performed: A. Only at failure B. During fabrication stages C. Only in lab D. After destruction Rationale: Early detection prevents defects. Correct Answer: B 48. Which is a limitation of VT?
51. VT is considered the first step in NDT because: A. It is most expensive B. It is quick and simple C. It uses radiation D. It is destructive Correct Answer: B 52. Which is an example of remote VT? A. Direct eye inspection B. Camera system C. Touch inspection D. Chemical dip Correct Answer: B 53. VT can detect weld: A. Chemistry B. Surface defects C. Radiation D. Density Correct Answer: B 54. A crack is classified as:
A. Discontinuity B. Alloy C. Element D. Phase Correct Answer: A
55. VT is performed using: A. Human senses B. Nuclear reactors C. Spectrometers D. Lasers only Correct Answer: A 56. VT inspection should be done: A. Only once B. At multiple stages C. Only after failure D. Only in labs Correct Answer: B 57. Surface preparation is important because: A. Improves color B. Enhances defect visibility
