V T

Question 1

1. VT could be best described as:
   a. detection of near surface anomalies and various color variations.
   b. optical detection of surface anomalies and checking
   conformance to specification.
   c. evaluation of metallurgical conditions via electronic
   microscope.
   d. examination for a wide variety of discontinuities open to or just below the surface.

Answer 1

b. optical detection of surface anomalies and checking
conformance to specification.

Question 2

2. What element of the eye is analogous to a digital camera, converting a light pattern into electronic signals?
   a. Eye muscle.
   b. Iris.
   c. Lens.
   d. Retina.

Answer 2

d. Retina.

Question 3

3. Illumination varies inversely as the square of the distance between the source and the point on the surface increases. What is this law called?
   a. Inverse square law.
   b. Cosine law.
   c. Generation of light law.
   d. Lambert’s law.

Answer 3

a. Inverse square law.

Question 4

4. When measuring surface roughness, Ra is defined as what?
   a. Average distance between the highest and lowest
   points.
   b. Average waviness from crest to trough.
   c. Average distance of the profile to the mean line.
   d. Parameter of friction between contact surfaces

Answer 4

c. Average distance of the profile to the mean line.

Question 5

5. What is the minimum luminance recommended by the Illuminating Engineering Society (IES) for task lighting with medium contrast and small size detection desired?
   a. 100 lx
   b. 200 lx
   c. 500 lx
   d. 2000 lx

Answer 5

c. 500 lx

Question 6

6. What is the direction of view called in a borescope or videoscope when viewing 45° off the straight-ahead
   direction of the probe?
   a. Forward slant.
   b. Forward oblique.
   c. Forespective.
   d. Angulated.

Answer 6

b. Forward oblique.

Question 7

7. How many bundles are there in a fiber-optic borescope and what are they called?
   a. One; monochromatic bundle.
   b. Two; light guide and image guide.
   c. Two; light guide and CCD cable bundle.
   d. Three; light guide, image guide, and fiber sheath.

Answer 7

b. Two; light guide and image guide.

Question 8

8. What is a commonly evident surface discontinuity visible to the unaided eye following forming?
   a. Forging bursts at the center of the billet.
   b. Laminations at end preparations of plate for welding.
   c. Edge breaks in temper-rolled sheets of steel.
   d. Segregation between pours.

Answer 8

c. Edge breaks in temper-rolled sheets of steel.

Question 9

9. What type of cracking occurs at the termination point of a weld made by tungsten inert gas welding?
   a. Crater crack.
   b. Hot tearing.
   c. Cold cracking.
   d. Hot cracking.

Answer 9

a. Crater crack.

Question 10

10. What is pillowing corrosion on aircraft lap joints, typically on aircraft skins, usually attributed to?
    a. Misalignment corrosion of fasteners used to attach
    the skins to the airframe.
    b. Stretching of the skins beyond their yield points over time.
    c. Expansion of corrosion products under the skins.
    d. Twisting of the airframe during tight turns and similar maneuvers.

Answer 10

c. Expansion of corrosion products under the skins.

Question 11

11. When inspecting welds for discontinuities located by VT, which of the following discontinuities is usually judged the least detrimental, depending on its depth?
    a. Undercut.
    b. Cracks.
    c. Lack of fusion.
    d. Incomplete penetration.

Answer 11

a. Undercut.

Question 12

12. How can the heat-affected zone (HAZ) of carbon steel welds be made visible?
    a. Etchants to enhance the visibility of the
    microstructure.
    b. High-frequency ultrasonic microscopic means.
    c. Color-contrast penetrating liquids.
    d. Arrays of temperature-sensitive markings

Answer 12

a. Etchants to enhance the visibility of the
microstructure.

Question 13

13. Reflectance is a measure of:
    a. the reactance of a coating.
    b. the mirror-like reflectance of a surface.
    c. the amount of artificial light at the inspection surface.
    d. the flatness of a finish coating.

Answer 13

b. the mirror-like reflectance of a surface.

Question 14

14. A datum:
    a. is a theoretical point identified on the blueprint.
    b. is a theoretical point, axis, or plane, derived from
    actual part features.
    c. is a feature controlled by two separate datums.
    d. has form only in terms of itself.

Answer 14

b. is a theoretical point, axis, or plane, derived from
actual part features.

Question 15

15. Color order systems describe color by:
    a. value and brightness saturation.
    b. primary and secondary colors.
    c. value, hue, and saturation.
    d. value of the primary color constituents.

Answer 15

c. value, hue, and saturation.

Question 16

16. A concave mirror can be helpful by:
    a. focusing the image viewed.
    b. diverging and optically reversing small images.
    c. converging and optically reversed small images.
    d. increasing the light returned to the inspector.

Answer 16

b. diverging and optically reversing small images.