Inspection (4) Flashcards
1
Q
Wavelengths for visible light spectrum
A
400 to 700nm 400 = violet 700 = Red (most sensitive)
2
Q
Minimum visible white light intensity required:
A
1000lux or 100fc at inspection surface
quantity of photon energy striking test surface
3
Q
Which light method is more sensitive?
A
Fluorescent
550nm (yellow/green)
4
Q
Ultraviolet light spectrum
A
100 to 400nm
classes A, B, C
5
Q
Black Light wavelength (UV-A) and risks
A
320-400nm
peak at 365nm
- blurred vision
- risk of cataracts
6
Q
UV-B wavelength and risks
A
280-320nm
“mid-wave”
- sunburn
- eye damage (snow blindness)
7
Q
UV-C wavelength and risks
A
100-280nm "short-wave" - sterilization - burns - eye damage
8
Q
Lamp types
A
Mercery Vapor - flood - spot (most common) - 100 watt Metal Halide - 400 watt - x10 UV light
9
Q
Parts of a black light
A
- current carrying electrode
- heater or starting electrode
- quartz tube
- resistor
- glass envelope
10
Q
UV light intensity required
A
at 15in should be 1000uW per cm²
