Sodium Vapour Lamp Multiple Choice Questions and Answers
26. When a sodium paper lamp is switched on initially the colour is
A. Red
B. Pink
C. Yellow
D. Blue
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B. Pink
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27. The colour of light given out by a sodium vapour discharge lamp is
A. Pink
B. Bluish green
C. Yellow
D. Blue
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28. The ignition voltage for a sodium lamp is about
A. 100 to 150 v
B. 200 to 250 v
C. 300 to 400 v
D. 400 to 600 v
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29. Sodium vapour lamp needs and ionisation voltage of about
A. 5 v
B. 20 v
C. 50 v
D. 100 v
E. 150 v
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30. The aluminous if you CNC office sodium vapour lamp is ........lumens per watt
A. 40 to 50
B. 50 to 100
C. 10 to 12
D. 100 to 150
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