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ITI
Electrician
Electrician Set-2
Illumination
12

Illumination MCQ with Answers

12) What is the unit of luminous flux?

Lux

Lumen

Candela

Lumen/m²

Answer is:

Lumen

Illumination MCQ with Answers

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Related Illumination MCQ with Answers

13) What is the unit of luminous efficiency?

Lux

Lumen

Lumen/m²

Lumen/watt

Answer is:

Lumen/watt

14) How the rate of evaporation in a vacuum bulb is reduced?

Filling inert gas

Producing arc in bulb

Reducing filament resistance

Increasing filament resistance

Answer is:

Filling inert gas

15) What is the main advantage of coiled coil lamp?

High melting point

Higher light output

Low operating voltage

Low power consumption

Answer is:

Higher light output

16) Which device provides ignition voltage and act as choke in a HPSV lamp?

Arc tube

Sodium vapour

Leak transformer

High pressure aluminium oxide

Answer is:

Leak transformer

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