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Illumination

Illumination
Illumination can be expressed in

  radians.
  lux.
  candela.
  lumens.

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Illumination
Luminous efficacy of a typical HPSV lamp is in between

 10 - 40 lm/watt
 70 - 120 lm/watt.
 40 - 70 lm/watt.
 120 - 200 lm/watt.

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Illumination
___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions.

  Utilization.
  Maintenance.
  Depreciation.
  Absorption factor.

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Illumination
Which lamp has a negative Colour Rendering Index (CRI)?

 LED
 High pressure sodium vapour
 Low pressure sodium vapour
 Fluorescent

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Illumination
What will be the total flux emitted by a source of 60 candle power?

 60 lumens.
 0.001326 lumens.
  None of these.
  754.2 lumens.

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Illumination
Unit of luminous flux is

  lumens.
  lux.
  candela.
  steradians.

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