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ONLINE MCQ EE-ILLUMINATION 6

Harikesh Yadav
Q51. The purpose of coating the fluorescent tube from inside with white power is
 A.  to improve its life
 [Wrong Answer]		  B.  to improve the appearance
 [Wrong Answer]
 C.  to change the colour of light emitted to white
 [Wrong Answer]		  D.  to increase the light radiations cl,ie to secondary emissions
 [Correct Answer]
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Q52. In sodium vapour lamp the function of the leak transformer is
 A.  to stabilize the arc
 [Wrong Answer]		  B.  to reduce the supply voltage
 [Wrong Answer]
 C.  both (a) and (b)
 [Correct Answer]		  D.  None of above
 [Wrong Answer]
$(document).ready(function(){
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$(‘#getrequest2195’).html(ajaxresult);

qid2195=$(‘#qid2195’).val(”);
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Q53. In case of ____ power factor is the power factor is the
 A.  GLS lamps
 [Correct Answer]		  B.  mercury arc lamps
 [Wrong Answer]
 C.  tube lights
 [Wrong Answer]		  D.  sodium vapour lamps
 [Wrong Answer]
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qid2196=$(‘#qid2196’).val(”);
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Q54. The vapour discharge tube used for domestic lighting has
 A.  no filament
 [Wrong Answer]		  B.  one filament
 [Wrong Answer]
 C.  two filaments
 [Correct Answer]		  D.  three filaments
 [Wrong Answer]
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$(‘#getrequest2197’).html(ajaxresult);

qid2197=$(‘#qid2197’).val(”);
section2197=$(‘#section2197’).val(”);
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subtype2197=$(‘#subtype2197’).val(”);
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Q55. A poor man for his kitchen will make use of
 A.  fluorescent tube
 [Wrong Answer]		  B.  incandescent lamp
 [Correct Answer]
 C.  sodium vapour lamp
 [Wrong Answer]		  D.  high pressure mercury vapour lamp
 [Wrong Answer]
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$.post(‘../../fav’,{ qid:qid2198, section: section2198, type: type2198, subtype: subtype2198 },function(ajaxresult){
$(‘#getrequest2198’).html(ajaxresult);

qid2198=$(‘#qid2198’).val(”);
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subtype2198=$(‘#subtype2198’).val(”);
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Q56. Luminous efficiency of a fluorescent tube is
 A.  10 lumens/watt
 [Wrong Answer]		  B.  20 lumens/watt
 [Wrong Answer]
 C.  lumens/watt
 [Wrong Answer]		  D.  60 lumens/watt
 [Correct Answer]
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$.post(‘../../fav’,{ qid:qid2199, section: section2199, type: type2199, subtype: subtype2199 },function(ajaxresult){
$(‘#getrequest2199’).html(ajaxresult);

qid2199=$(‘#qid2199’).val(”);
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subtype2199=$(‘#subtype2199’).val(”);
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Q57. The filament of a GLS lamp is made of
 A.  tungsten
 [Correct Answer]		  B.  copper
 [Wrong Answer]
 C.  carbon
 [Wrong Answer]		  D.  aluminium
 [Wrong Answer]
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$.post(‘../../fav’,{ qid:qid2200, section: section2200, type: type2200, subtype: subtype2200 },function(ajaxresult){
$(‘#getrequest2200’).html(ajaxresult);

qid2200=$(‘#qid2200’).val(”);
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Q58. Desired illumination level on the work­ing plane depends upon
 A.  age group of observers
 [Wrong Answer]		  B.  whether the object is stationary or moving
 [Wrong Answer]
 C.  size of the object to be seen and its distance from the observer
 [Wrong Answer]		  D.  whether the object is to be seen for longer duration or shorter duration of time

 [Wrong Answer]
 E.  all above factors
 [Correct Answer]
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$(‘#getrequest2201’).html(ajaxresult);

qid2201=$(‘#qid2201’).val(”);
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Q59. _____ will need lowest level of illumination
 A.  Audiotoriums
 [Wrong Answer]		  B.  Railway platform
 [Correct Answer]
 C.  Displays
 [Wrong Answer]		  D.  Fine engravings
 [Wrong Answer]
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$(‘#getrequest2202’).html(ajaxresult);

qid2202=$(‘#qid2202’).val(”);
section2202=$(‘#section2202’).val(”);
type2202=$(‘#type2202’).val(”);
subtype2202=$(‘#subtype2202’).val(”);
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Q60. Most affected parameter of a filament ‘lamp due to voltage change is
 A.  wattage
 [Wrong Answer]		  B.  life
 [Correct Answer]
 C.   luminous efficiency
 [Wrong Answer]		  D.  light output
 [Wrong Answer]
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