Fluorescent Lamp Multiple Choice Questions and Answers


41.  Which off the following is present inside the fluorescent tube?


   A. Helium and oxygen

   B. Aragon and carbon dioxide

   C. Aragon and neon

   D. Mercury vapour


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D. Mercury vapour

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42.  Standard wattage of a 1 m fluorescent tube is


   A. 50 w

   B. 25 w

   C. 100 w

   D. 85 w


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B. 25 w

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43.  A fluorescent tube can be operated on


   A. Both DC and AC supply

   B. Only AC supply

   C. Only DC supply

   D. Satisfactory only on the supply


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A. Both DC and AC supply

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44.  A capacitor is connected across the fluorescent tube circuit in order to


   A. Eliminate the noise

   B. Limit the current

   C. Improve the power factor of the tube circuit

   D. All of the above

   E. None of the above


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C. Improve the power factor of the tube circuit

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45.  The Flickr effect of fluorescent lamps is more pronounced at


   A. Lower voltages

   B. Higher voltages

   C. Higher frequencies

   D. Lower frequencies


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D. Lower frequencies

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