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Illumination

Illumination
The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is

 140.
  150.
 200.
  30

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Illumination
Total flux or lumens required in any lighting scheme depends inversely on

  reduction factor.
None of these
  utilization factor.
  reflection factor.

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Illumination
Unit of luminous flux is

  candela.
  lumens.
  lux.
  steradians.

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Illumination
The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is

  2 / 3.
  3 / 2.
 1 / 3.
 2 / 5.

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Illumination
A 200 candle power lamp is hung 4 m above the centre of circular area of 5 m diameter. The illumination at centre of the area is

  12.5 lux.
 18.5 lux.
 17.5 lux.
  13.5 lux.

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

 Low pressure sodium vapour
 High pressure sodium vapour
 Fluorescent
 LED

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MORE MCQ ON Illumination

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