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 45 %. 30 %. 20 %. 70 %. 45 %. 30 %. 20 %. 70 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination Illumination can be expressed in lux. lumens. radians. candela. lux. lumens. radians. candela. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela is the unit of which? Luminous flux. Frequency. Luminous intensity. Wavelength. Luminous flux. Frequency. Luminous intensity. Wavelength. ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on None of these reduction factor. utilization factor. reflection factor. None of these reduction factor. utilization factor. reflection factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which cells in the eye are responsible for scotopic vision? None of these Rod cells Both ‘a’ and ‘b’ Cone cells None of these Rod cells Both ‘a’ and ‘b’ Cone cells ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp has a negative Colour Rendering Index (CRI)? Fluorescent LED High pressure sodium vapour Low pressure sodium vapour Fluorescent LED High pressure sodium vapour Low pressure sodium vapour ANSWER DOWNLOAD EXAMIANS APP
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