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Electrician
Electrician Set-1
Sources of Light
18

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

18) In a H.P.M.V. lamp, the mercury vapour discharges at :

a higher pressure

a medium pressure

a low pressure

none of the above

Answer is:

a low pressure

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

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

19) Most recent development in fluorescent lighting is the :

rapid start lamp

pre-heat lamp

glow lamp

instant start lamp

Answer is:

glow lamp

20) In a high pressure mercury lamp, to vaporize all the mercury and for the lamp to reach full brilliance, it requires :

2 to 4 minutes

4 to 6 minutes

6 to 8 minutes

8 to 10 minutes

Answer is:

4 to 6 minutes

21) The rating of I.C.D.P. switch used in a neon-sign tube should be :

15 A, 250 V

15 mA, 230 V

15mA, 1000 V

15 A, 1000 V

Answer is:

15 A, 250 V

22) H.P.M.V lamp gives :

30 lumens / watt

50 lumens / watt

60 lumens / watt

80 lumens / watt

Answer is:

50 lumens / watt

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

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