Q.Co-efficient of utilisation depends upon

  • AColour of the walls
  • BColour of ceiling
  • CSize of the room
  • DAll of the above
Correct Answer : (D)

All of the above

Hints :

Co-efficient of utilisation depends upon Colour of the walls, Colour of ceiling and Size of the room.


Luminous efficiency of a fluorescent tube is


Candela is the unit of which of the following?

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