1000+ Illumination Objective Questions and Answers Pdf - 1

Question: 1

The filament of a GLS lamp is made of

(A) aluminium

(B) carbon

(C) copper

(D) tungsten

Question: 2

Candela is the unit of which of the following?

(A) frequency

(B) luminous flux

(C) luminous intensity

(D) wavelength

Question: 3

The colour of sodium vapour discharge lamp is

(A) bluish green

(B) yellow

(C) pink

(D) red

Question: 4

The purpose of coating the fluorescent tube from inside with white power is

(A) to increase the light radiations due to secondary emissions

(B) to change the colour of light emitted to white

(C) to improve the appearance

(D) to improve its life

Question: 5

The function of capacitor across the supply to the fluorescent tube is primarily to

(A) reduce the noise

(B) improve the supply power factor

(C) reduce the starting current

(D) stabilize the arc