Supplemental Lighting (4)

Question 1

Main purpose of supplemental lighting

Answer 1

Make sure the minimum lighting requirements are met.

Question 2

What does a phosphor coating do on an LED light?

Answer 2

shifts the wavelengths produced from an LED (pale blue) to a warm yellow colour so that the produced light mimics a radiated incandescence.

Question 3

Angle of viewing with light

Answer 3

ASME Boiler and Pressure Vessel Code, Section V, Article 9 states: eye must be closer than 25inches but not to close that the eye cannot focus, viewing angle is not less than 30° from the measured inspection surface

Question 4

Colour Filters

Answer 4

Used to change the characteristics of light during an inspection;
- coloured filters -eliminate colours

Question 5

Scotopic vision

Answer 5

trying to preserve light (Scotopic)

- Flashlights with red filters

Question 6

Diffusers

Answer 6

Used to change the characteristics of light;

- diffusers intentionally scatter the light source to reduce glare, contrast and shadows

Question 7

Polarizing Filters

Answer 7

Used to change the characteristics of light;

- control light scatter and glare, polarize the source or received image

Question 8

Magnification

Answer 8

Magnifiers/Loupes
Mag power = 10
——-
focal distance (in)

Question 9

Remote Visual Inspection

Answer 9

• Mirrors
• Borescopes
• Videoscopes