Illumination Candela/metre square is the unit of which photometric quantity? Luminous flux Illuminance Luminance Luminous Intensity Luminous flux Illuminance Luminance Luminous Intensity ANSWER DOWNLOAD EXAMIANS APP
Illumination What is the work of a driver in case of an LED? To convert AC to DC To convert DC to AC None of these Both ‘a’ and ‘b’ To convert AC to DC To convert DC to AC None of these Both ‘a’ and ‘b’ ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to absorption factor. waste light factor. beam factor. utilization factor. absorption factor. waste light factor. beam factor. utilization factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination A 1000 W bulb fitted with a reflector illuminates an area of 3 m x 3 m with an average illumination of 450 lux. If the bulb has and efficiency of 9 lumens / watt the efficiency of the reflector is 70 %. 45 %. 20 %. 30 %. 70 %. 45 %. 20 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp has a negative Colour Rendering Index (CRI)? LED Low pressure sodium vapour High pressure sodium vapour Fluorescent LED Low pressure sodium vapour High pressure sodium vapour Fluorescent ANSWER DOWNLOAD EXAMIANS APP
Illumination Unit of luminous flux is lumens. lux. candela. steradians. lumens. lux. candela. steradians. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS