1000+ Illumination Objective Questions and Answers Pdf - 2

Question: 6

In case of _____ power factor is the highest.

(A) sodium vapour lamps

(B) tube lights

(C) mercury arc lamps

(D) GLS lamps

Question: 7

Stroboscopic effect due to use of discharge lamps in workshops results in moving machinery appearing

(A) stationary running in reverse direction

(B) stationary running slow

(C) stationary

(D) all of the above

Question: 8

______ will need lowest level of illumination.

(A) Fine engravings

(B) Displays

(C) Railway platform

(D) Audiotoriums

Question: 9

_____ is a cold cathode lamp.

(A) Sodium vapour lamp

(B) Mercury vapour lamp

(C) Fluorescent lamp

(D) Neon lamp

Question: 10

A solid angle is expressed in terms of

(A) degrees

(B) steradians

(C) radians

(D) radians/metre