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Visual Testing (VT) - Level II

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VT Level II General Quiz - Set 2

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1. Which part of the eye provides the greatest share of the eye's total refractive (focusing) power?
Cornea Retina Pupil Crystalline lens
2. Rod cells in the retina are primarily responsible for:
Perception of fine colour differences Protecting the eye from ultraviolet light Changing the curvature of the lens Vision under low-light conditions
3. Visual fatigue during prolonged inspection is best managed by:
Viewing the part from a greater distance Scheduling periodic rest breaks and providing adequate lighting Increasing magnification to the maximum available Reducing the illumination to lessen glare
4. Visual acuity is defined as the ability of the eye to:
Adapt to changes in brightness Perceive depth using both eyes Resolve fine detail Distinguish between colours
5. The most common form of inherited colour vision deficiency is:
Total colour blindness Inability to see shades of grey Red-green deficiency Blue-yellow deficiency
6. Dark adaptation refers to:
The narrowing of the pupil in bright light The gradual increase in the eye's sensitivity after moving from bright to dim light The eye's ability to focus on near objects Loss of colour perception with age
7. Presbyopia, which can affect an inspector's near vision, is caused by:
A deficiency of cone cells Damage to the optic nerve Clouding of the cornea Age-related loss of the lens's ability to accommodate
8. Illuminance is best described as:
The amount of light falling on a surface per unit area The light reflected from a surface toward the observer The total light output of a lamp in all directions The colour temperature of a light source
9. The instrument used to verify the illumination level at an examination surface is a:
Gloss meter Pyrometer Calibrated light meter (illuminance meter) Densitometer
10. Translucent visual examination relies on:
Light transmitted through the material to reveal internal features Light reflected only from the front surface Ultraviolet radiation causing fluorescence Magnetic fields to reveal surface cracks
11. A visual examination in which the line of sight is interrupted and imaging aids such as borescopes or cameras are used is called:
Translucent visual examination Remote visual examination Direct visual examination Aided direct examination
12. When viewing a component with an inspection mirror, the inspector must remember that the image is:
Identical in orientation to direct viewing Magnified by a factor of two Inverted top to bottom and side to side Laterally reversed
13. Depth of field is defined as:
The maximum area visible through an optical device The distance from the lens to the image sensor The range of distances over which an object remains in acceptable focus The ratio of image size to object size
14. Field of view is defined as:
The range of distances that remain in focus The angle at which light strikes the test surface The smallest detail an optical system can resolve The area of the object that can be seen through an optical device at one time
15. A borescope with a 0 degree direction of view looks:
Straight ahead along the axis of the instrument Backward toward the eyepiece At right angles to the instrument axis At a fixed 45 degree oblique angle
16. Which feature allows a modern videoscope to estimate the size of a discontinuity?
The light guide bundle Built-in measurement capability such as stereo or 3D phase measurement Tip articulation control The insertion tube's outer braid
17. The principal advantage of a flexible fiberscope over a rigid borescope is that it:
Requires no external light source Always provides higher image resolution Can be guided through curved or non-straight access paths Is immune to damage from bending
18. Black dots that appear in a fixed pattern in a fiberscope image most likely indicate:
Porosity in the component An incorrect light source colour temperature Dirt on the test surface Broken fibres in the image bundle
19. Parallax error when reading a steel rule is minimised by:
Holding the rule slightly above the surface Viewing the graduation directly perpendicular to the scale with the rule edge in contact Viewing the scale at a 45 degree angle Reading the scale from the opposite end
20. A standard dial caliper can typically be used to measure:
Outside, inside and depth dimensions Outside dimensions only Depth dimensions only Outside and inside dimensions only
21. The ratchet stop or friction thimble on a micrometer is used to:
Lock the spindle in position after measuring Increase the measuring range Convert readings from inch to metric Apply a consistent measuring force for repeatable readings
22. Before using a micrometer, the inspector should first:
Apply lubricant to the anvil and spindle faces Open the micrometer to its full range Clean the measuring faces and verify the zero reading Heat the micrometer to the part temperature
23. The Bridge Cam (Cambridge) weld gauge is a multi-purpose gauge capable of measuring:
Preparation angle, excess weld metal, undercut depth and misalignment Interpass temperature and preheat Surface roughness and coating thickness Hardness and tensile strength
24. Weld reinforcement in a groove weld refers to:
The width of the heat-affected zone Weld metal in excess of the quantity required to fill the joint The depth of fusion into the base metal The backing strip placed under the root
25. For a flat-faced equal-leg fillet weld with 10 mm legs, the theoretical throat is approximately:
5 mm 10 mm 7 mm 14 mm
26. Incomplete fusion is a weld discontinuity in which:
Gas pores are aligned along the weld axis Weld metal fails to extend through the joint thickness only at the root The weld face is below the adjacent base metal surface Fusion did not occur between weld metal and the fusion faces or adjoining weld beads
27. Viewing a single-V groove weld from the root side, an unfused root face visible along the joint indicates:
Undercut Incomplete joint penetration Excessive reinforcement Overlap
28. A crater crack is typically found:
At the termination of a weld bead Along the centre of the heat-affected zone only In the base metal far from the weld At the start of every weld pass
29. Root concavity (suck-back) is best described as:
A shallow groove in the root surface caused by shrinkage of the root bead A crack running along the root centreline A groove at the weld toe on the face side Excess weld metal protruding from the root
30. Which welding process uses a consumable electrode coated with flux?
Submerged arc welding (SAW) Shielded metal arc welding (SMAW) Gas metal arc welding (GMAW) Gas tungsten arc welding (GTAW)
31. Tungsten inclusions are a discontinuity most commonly associated with:
Shielded metal arc welding (SMAW) Oxyfuel gas welding (OFW) Submerged arc welding (SAW) Gas tungsten arc welding (GTAW)
32. Submerged arc welding (SAW) is characterised by:
A non-consumable tungsten electrode Shielding provided only by an inert gas An arc shielded beneath a blanket of granular flux A flux-coated stick electrode
33. Shrinkage cavities in castings are caused by:
Inadequate feeding of molten metal during solidification contraction Folding of metal during hot working Galvanic action between dissimilar metals Cyclic stresses in service
34. Which of the following is classified as a service-induced discontinuity?
Forging lap Lamination Fatigue crack Cold shut
35. Stress corrosion cracking requires the combination of:
Cyclic loading in a dry environment Tensile stress, a susceptible material and a specific corrosive environment Compressive stress and high temperature only Abrasive particles and high fluid velocity
36. Crevice corrosion is most likely to occur:
Only on surfaces exposed to high-velocity flow Only in components made of dissimilar metals Uniformly over fully exposed surfaces In shielded areas such as under gaskets or in lap joints where stagnant solution collects
37. Fretting damage results from:
High-velocity fluid impingement Hydrogen diffusion into the metal Small oscillatory relative motion between contacting surfaces Exposure to elevated temperature only
38. On an AWS standard welding symbol, a weld symbol placed below the reference line indicates that the weld is to be made on the:
Arrow side of the joint Other side of the joint Field side of the joint Both sides of the joint
39. When using high-intensity light sources during visual testing, the inspector should:
Look directly into the source to check its output Operate the source without any guards to reduce heat Remove safety glasses to improve visibility Avoid looking directly into the source and use appropriate eye protection
40. Forging bursts are internal ruptures typically caused by:
Gas evolution during casting solidification Working the metal at improper temperatures or with excessive reduction Galvanic corrosion in service Insufficient filler metal during welding