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ONLINE MCQ EE-ILLUMINATION 5

Harikesh Yadav
Q41. The unit of luminous flux is
 A.  watt/m2
 [Wrong Answer]		  B.  lumen
 [Correct Answer]
 C.  lumen/m2
 [Wrong Answer]		  D.  watt
 [Wrong Answer]
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Q42. The colour of sodium vapour discharge lamp is
 A.  red
 [Wrong Answer]		  B.  pink
 [Wrong Answer]
 C.  yellow
 [Correct Answer]		  D.  bluish green
 [Wrong Answer]
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Q43. A reflector is provided to
 A.  protect the lamp
 [Wrong Answer]		  B.  provide better illumination
 [Wrong Answer]
 C.  avoid glare
 [Wrong Answer]		  D.  do all of the above
 [Correct Answer]
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Q44. ____ does not have separate choke
 A.  Sodium vapour lamp
 [Correct Answer]		  B.  Fluorescent lamp
 [Wrong Answer]
 C.  Mercury vapour lamp
 [Wrong Answer]		  D.  All of the above
 [Wrong Answer]
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qid2187=$(‘#qid2187’).val(”);
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Q45. A substance which change its electrical resistance when illuminated by light is called
 A.  photoelectric
 [Wrong Answer]		  B.  photovoltaic
 [Wrong Answer]
 C.  phatoconductive
 [Correct Answer]		  D.  none of the above
 [Wrong Answer]
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qid2188=$(‘#qid2188’).val(”);
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type2188=$(‘#type2188’).val(”);
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Q46. Luminous flux is
 A.  the light energy radiated by sun
 [Wrong Answer]		  B.  the part of light energy, radiated by sun, which is received on the earth
 [Wrong Answer]
 C.  the rate of energy radiation in the form of light waves
 [Correct Answer]		  D.  none of the above
 [Wrong Answer]
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$(‘#getrequest2189’).html(ajaxresult);

qid2189=$(‘#qid2189’).val(”);
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subtype2189=$(‘#subtype2189’).val(”);
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Q47. Sky appears blue because of
 A.  refraction
 [Wrong Answer]		  B.  reflection
 [Wrong Answer]
 C.  radiation
 [Wrong Answer]		  D.  scattering of light over dust parti­cles
 [Correct Answer]
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Q48. The level of illumination on a surface least depends on
 A.  ambient temperature
 [Correct Answer]		  B.  candle power of the source
 [Wrong Answer]
 C.  distance of the source
 [Wrong Answer]		  D.  type of reflector used
 [Wrong Answer]
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$(‘#getrequest2191’).html(ajaxresult);

qid2191=$(‘#qid2191’).val(”);
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Q49. Filament lamps operate normally at a power factor of
 A.  0.5 lagging
 [Wrong Answer]		  B.  0.8 lagging
 [Wrong Answer]
 C.  unity
 [Correct Answer]		  D.  0.8 leading
 [Wrong Answer]
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$(‘#getrequest2192’).html(ajaxresult);

qid2192=$(‘#qid2192’).val(”);
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subtype2192=$(‘#subtype2192’).val(”);
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Q50. Carbon arc lamps are commonly used in
 A.  photography
 [Wrong Answer]		  B.  cinema projectors
 [Correct Answer]
 C.  domestic lighting
 [Wrong Answer]		  D.  street lighting
 [Wrong Answer]
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$(‘#getrequest2193’).html(ajaxresult);

qid2193=$(‘#qid2193’).val(”);
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