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Electrician
Electrician Set-2
Illumination
10

Illumination MCQ with Answers

10) Why the outer tube of a high pressure metal halide lamp made of boro silicate glass?

Increase the lighting effect

Withstand heavy temperatu

Withstand atmospheric pressure

Reduce the ultra violet radiation from lamp

Answer is:

Reduce the ultra violet radiation from lamp

Illumination MCQ with Answers

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Related Illumination MCQ with Answers

11) What is the term refers luminous flux given by light source per unit solid angle?

Lumen

Candela

Illuminance

Luminous intensity

Answer is:

Luminous intensity

12) What is the unit of luminous flux?

Lux

Lumen

Candela

Lumen/m²

Answer is:

Lumen

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

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