Illumination Multiple Choice Questions and Answers

11.  The illumination level required for important traffic routes getting first traffic is about

   A. 30 lux

   B. 200 lux

   C. 100 lux

   D. 5 lux

12.  Desired illumination level on the working plane depends upon

   A. Age group of observers

   B. Whether the object is stationary or moving

   C. Size of the object to be seen and its distance from the observer

   D. All of the above

13.  The luminous flux reaching the working plane list depends on

   A. Proportion of the room

   B. The lumen output of the lamps

   C. Colour of the working plane surface

   D. Reflectance of internal surfaces

14.  Utilisation factor depends upon

   A. Size of the room

   B. Space height ratio of the lamps

   C. Colour of walls or ceding

   D. All of the above

   E.None of the above

15.  The unit of luminous flux is

   A. Watt/metersquare

   B. Lumen

   C. Lumen/m²

   D. Watt

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