Building Construction (Lighting Systems)

15 Questions | Total Attempts: 89

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Building Construction (Lighting Systems)

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Questions and Answers
  • 1. 
    Unit of light or luminous flux
  • 2. 
    Amount of lumens falling on an area one square foot one foot away
  • 3. 
    Amound of lumens falling on an area one square meter one meter away
  • 4. 
    Measuring luminous intensity
  • 5. 
    Unit of light intensity
  • 6. 
    Unit of brightness
  • 7. 
    Lamps composed of a seal glass containing a filament connected at its ends to the contact area in the base, thereby completing an electric circuit.
  • 8. 
    Complete optical systems in a single bulb. The bulb contais a filament, reflector and lens
  • 9. 
    Use a halogen gas cycle to prevent rapid depreciation of the lamp filament and darkening of the transparent envelop
  • 10. 
    A cylindrical glass tube, sealed at both ends and containing inert gas. built into each end is a cathode which supplies the electrons to start and maintain the mercury arc or gaseous discharge. 
  • 11. 
    When electrically excited, produces visible light of characteristically blue-green color
  • 12. 
    Modification of the mercury vapor with an arc of improved color. possesses increased light output, improved color rendition without the use of phosphors and a small source size. 
  • 13. 
    Newest addition to the HID field. arc tube is made of high-density polycrystalline alumina and contains a mixture of primarily sodium. 
  • 14. 
    Auxiliary equipment for fluorescent and HID lamps which limits the amount of current in the lamp. 
  • 15. 
    Used where color matching is important, equivalent to a north sky.