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Electrician
Electrician Set-1
Sources of Light
42

Sources of Light MCQ - Electrician (Set-1) with Answers

42) Colour of the light from the Neon-sign lamp depends on which one of the following

Colour of the building

Current flowing through the tube

Temperature of the tube

Gases in the tube

Answer is:

Gases in the tube

Sources of Light MCQ - Electrician (Set-1) with Answers

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Related Sources of Light MCQ - Electrician (Set-1) with Answers

43) Which one of the basic fluorescent powder is used in neon sign lamp to get blue colour ?

Cadmium silicate

Calcium silicate

Calcium tungstate

Zinc silicate

Answer is:

Calcium tungstate

44) The average life of sodium vapour lamp is about

1000 hours

2000 hours

3000 hours

6000 hours

Answer is:

6000 hours

45) Light used in the front yard of the house should not attract insects in view of safety. Which type of lamp you will avoid ?

Mercury vapour lamp

Sodium vapour lamp

Halogen lamp

GLS lamp

Answer is:

Mercury vapour lamp

46) MB type mercury vapour lamp operates at a high extra pressure of

2 to 10 atmospheres

3 to 10 atmospheres

4 to 10 atmospheres

5 to 10 atmospheres

Answer is:

5 to 10 atmospheres

Sources of Light MCQ - Electrician (Set-1) with Answers

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