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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C. Yellow

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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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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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A. 5 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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A. 40 to 50

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