EXAMIANS
___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions.
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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
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Which lamp has the best Colour Rendering Index (CRI)?
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What is the work of a driver in case of an LED?
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Total flux or lumens required in any lighting scheme depends inversely on
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What is the ratio of illuminance at a point 5m just below a lamp emitting 100 candelas and at a point 5m away from the first point on the same horizontal plane?
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The work of ballast in a fluorescent tube is to
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Illumination can be expressed in
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What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m × 3m rectangular room?
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In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to
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