Visual Testing

Question 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

1) - B

Question 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

2) - D

Question 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

3) - A

Question 4

When measuring surface roughness, Ra is defined as:

A. Average distance between highest and lowest points.

B. Average waviness crest to trough.

C. Average distance of profile to mean line.

D. Parameter of friction.

Answer 4

4) - C

Question 5

Minimum luminance recommended by IES:

A. 100 lx

B. 200 lx

C. 500 lx

D. 2000 lx

Answer 5

5) - C

Question 6

Direction of view 45° off straight‑ahead in borescope:

A. Forward slant

B. Forward oblique

C. Retrospective

D. Angulated

Answer 6

6) - B

Question 7

Number of bundles in a fiberscope:

A. One; monochromatic

B. Two; light guide + image guide

C. Two; light guide + CCD cable

D. Three; light guide + image guide + fiber sheath

Answer 7

7) - B

Question 8

Forming discontinuity visible unaided:

A. forging bursts center billet

B. laminations at weld prep ends

C. edge breaks in temper‑rolled sheet

D. segregation between pours

Answer 8

8) - C

Question 9

Cracking at TIG weld termination:

A. crater crack

B. hot tearing

C. cold cracking

D. hot cracking

Answer 9

9) - A

Question 10

Pillowing corrosion due to:

A. misalignment corrosion fasteners

B. stretching skins

C. expansion of corrosion products

D. twisting of airframe

Answer 10

10) - C

Question 11

Least detrimental weld VT discontinuity:

A. undercut

B. cracks

C. lack of fusion

D. incomplete penetration

Answer 11

11) - A

Question 12

HAZ visibility:

A. etchants

B. ultrasonic microscopy

C. color‑contrast penetrants

D. temperature‑sensitive markings

Answer 12

12) - A

Question 13

Reflectance measures:

A. coating reactance

B. mirror‑like reflectance

C. amount of artificial light

D. flatness of coating

Answer 13

13) - B

Question 14

Datum:

A. theoretical point blueprint

B. theoretical point/axis/plane from features

C. feature controlled by two datums

D. self‑form only

Answer 14

14) - B

Question 15

Color order systems describe by:

A. value + brightness

B. primary + secondary

C. value + hue + saturation

D. value of primary constituents

Answer 15

15) - C

Question 16

Concave mirror helpful by:

A. enlarging image

B. diverging + reversing images

C. converging + reversing images

D. increasing returned light

Answer 16

16) - A

Question 17

Weld discontinuity NOT visually evident on fillet:

A. weld profile

B. crater crack

C. incomplete penetration

D. undercut

Answer 17

17) - C