# ONLINE MCQ EE-ILLUMINATION 1

Q1. What percentage of the input energy is radiated by filament lamps ?
A.  2 to 5 percent
B.  10 to 15 percent
C.  25 to 30 percent
D.  40 to 50 percent
 \$(document).ready(function(){ \$(‘#loaddata2144’).click(function(){ qid2144=\$(‘#qid2144’).val(); section2144=\$(‘#section2144’).val(); type2144=\$(‘#type2144’).val(); subtype2144=\$(‘#subtype2144’).val(); \$.post(‘../../fav’,{ qid:qid2144, section: section2144, type: type2144, subtype: subtype2144 },function(ajaxresult){ \$(‘#getrequest2144’).html(ajaxresult); qid2144=\$(‘#qid2144’).val(”); section2144=\$(‘#section2144’).val(”); type2144=\$(‘#type2144’).val(”); subtype2144=\$(‘#subtype2144’).val(”); }); }); }); Explanation:- Answer : B

Q2. In lighting circuit using filament lamps 1% voltage drop results into
A.  no loss of light
B.  1.5 percent loss in the light output
C.  3.5 percent loss in the light output
D.  15 percent loss in the light output
 \$(document).ready(function(){ \$(‘#loaddata2145’).click(function(){ qid2145=\$(‘#qid2145’).val(); section2145=\$(‘#section2145’).val(); type2145=\$(‘#type2145’).val(); subtype2145=\$(‘#subtype2145’).val(); \$.post(‘../../fav’,{ qid:qid2145, section: section2145, type: type2145, subtype: subtype2145 },function(ajaxresult){ \$(‘#getrequest2145’).html(ajaxresult); qid2145=\$(‘#qid2145’).val(”); section2145=\$(‘#section2145’).val(”); type2145=\$(‘#type2145’).val(”); subtype2145=\$(‘#subtype2145’).val(”); }); }); }); Explanation:- Answer : C

Q3. Which of the following instruments is used for the comparison of candle powers of different sources ?
B.  Bunsen meter.
C.  Photometer
D.  Candle meter
 \$(document).ready(function(){ \$(‘#loaddata2146’).click(function(){ qid2146=\$(‘#qid2146’).val(); section2146=\$(‘#section2146’).val(); type2146=\$(‘#type2146’).val(); subtype2146=\$(‘#subtype2146’).val(); \$.post(‘../../fav’,{ qid:qid2146, section: section2146, type: type2146, subtype: subtype2146 },function(ajaxresult){ \$(‘#getrequest2146’).html(ajaxresult); qid2146=\$(‘#qid2146’).val(”); section2146=\$(‘#section2146’).val(”); type2146=\$(‘#type2146’).val(”); subtype2146=\$(‘#subtype2146’).val(”); }); }); }); Explanation:- Answer : C

Q4. For precision work the illumination ‘level required is of the order of
A.   500-1000 lumens/m2
B.  200-400 lumens/m2
C.   50-100 lumens/m2
D.  10-25 lumens/m2
 \$(document).ready(function(){ \$(‘#loaddata2147’).click(function(){ qid2147=\$(‘#qid2147’).val(); section2147=\$(‘#section2147’).val(); type2147=\$(‘#type2147’).val(); subtype2147=\$(‘#subtype2147’).val(); \$.post(‘../../fav’,{ qid:qid2147, section: section2147, type: type2147, subtype: subtype2147 },function(ajaxresult){ \$(‘#getrequest2147’).html(ajaxresult); qid2147=\$(‘#qid2147’).val(”); section2147=\$(‘#section2147’).val(”); type2147=\$(‘#type2147’).val(”); subtype2147=\$(‘#subtype2147’).val(”); }); }); }); Explanation:- Answer : A

Q5. Which of the following bulbs operates on least power ?
A.  GLS bulb
B.  Torch bulb
C.  Neon bulb
D.  Night bulb
 \$(document).ready(function(){ \$(‘#loaddata2148’).click(function(){ qid2148=\$(‘#qid2148’).val(); section2148=\$(‘#section2148’).val(); type2148=\$(‘#type2148’).val(); subtype2148=\$(‘#subtype2148’).val(); \$.post(‘../../fav’,{ qid:qid2148, section: section2148, type: type2148, subtype: subtype2148 },function(ajaxresult){ \$(‘#getrequest2148’).html(ajaxresult); qid2148=\$(‘#qid2148’).val(”); section2148=\$(‘#section2148’).val(”); type2148=\$(‘#type2148’).val(”); subtype2148=\$(‘#subtype2148’).val(”); }); }); }); Explanation:- Answer : B

Q6. Co-efficient of utilisation depends upon
A.  colour of the walls
B.  colour of ceiling
C.  size of the room
D.  all of the above
 \$(document).ready(function(){ \$(‘#loaddata2149’).click(function(){ qid2149=\$(‘#qid2149’).val(); section2149=\$(‘#section2149’).val(); type2149=\$(‘#type2149’).val(); subtype2149=\$(‘#subtype2149’).val(); \$.post(‘../../fav’,{ qid:qid2149, section: section2149, type: type2149, subtype: subtype2149 },function(ajaxresult){ \$(‘#getrequest2149’).html(ajaxresult); qid2149=\$(‘#qid2149’).val(”); section2149=\$(‘#section2149’).val(”); type2149=\$(‘#type2149’).val(”); subtype2149=\$(‘#subtype2149’).val(”); }); }); }); Explanation:- Answer : D

Q7. In sodium vapour lamp neon gas
A.  acts as a shield around the filament
B.  assists in developing enough heat to vaporize the sodium
C.  change the colour of light
D.  prevents the vaporization of filament
 \$(document).ready(function(){ \$(‘#loaddata2150’).click(function(){ qid2150=\$(‘#qid2150’).val(); section2150=\$(‘#section2150’).val(); type2150=\$(‘#type2150’).val(); subtype2150=\$(‘#subtype2150’).val(); \$.post(‘../../fav’,{ qid:qid2150, section: section2150, type: type2150, subtype: subtype2150 },function(ajaxresult){ \$(‘#getrequest2150’).html(ajaxresult); qid2150=\$(‘#qid2150’).val(”); section2150=\$(‘#section2150’).val(”); type2150=\$(‘#type2150’).val(”); subtype2150=\$(‘#subtype2150’).val(”); }); }); }); Explanation:- Answer : B

Q8. Candela is the unit of which of the following ?
A.  Wavelength
B.  Luminous intensity
C.  Luminous flux
D.  Frequency
 \$(document).ready(function(){ \$(‘#loaddata2151’).click(function(){ qid2151=\$(‘#qid2151’).val(); section2151=\$(‘#section2151’).val(); type2151=\$(‘#type2151’).val(); subtype2151=\$(‘#subtype2151’).val(); \$.post(‘../../fav’,{ qid:qid2151, section: section2151, type: type2151, subtype: subtype2151 },function(ajaxresult){ \$(‘#getrequest2151’).html(ajaxresult); qid2151=\$(‘#qid2151’).val(”); section2151=\$(‘#section2151’).val(”); type2151=\$(‘#type2151’).val(”); subtype2151=\$(‘#subtype2151’).val(”); }); }); }); Explanation:- Answer : B

Q9. Which of the following lamps is the ‘cheapest for the same wattage ?
A.  Fluorescent tube
B.  Mercury vapour lamp
C.  GLS lanip
D.  Sodium vapour lamp