Illumination The work of ballast in a fluorescent tube is to limit the flow of current. provide a kick start when voltage is induced. None of these. both ‘a’ and ‘b’. limit the flow of current. provide a kick start when voltage is induced. None of these. both ‘a’ and ‘b’. ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the total flux emitted by a source of 60 candle power? 0.001326 lumens. 754.2 lumens. 60 lumens. None of these. 0.001326 lumens. 754.2 lumens. 60 lumens. None of these. ANSWER DOWNLOAD EXAMIANS APP
Illumination Unit of luminous flux is lumens. candela. lux. steradians. lumens. candela. lux. steradians. ANSWER DOWNLOAD EXAMIANS APP
Illumination From a uniform light source having luminous intensity of 300 candelas, there exists a plane surface 15 m below. The value of illuminance at a point on the plane surface where the luminous flux rays are inclined at an angle of 30 to the surface is 58.45 Kilolux. 17.32 lux. 1.53 lux. 1.15 lux. 58.45 Kilolux. 17.32 lux. 1.53 lux. 1.15 lux. ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to waste light factor. absorption factor. utilization factor. beam factor. waste light factor. absorption factor. utilization factor. beam factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination 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? 2 5 4 6 2 5 4 6 ANSWER DOWNLOAD EXAMIANS APP
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