# ONLINE MCQ EE-ELECTRIC WELDING 6

Q51. In electrical resistance welding the greatest resistance is offered by which of the following ?
A.  Metal surface
B.  Contact point of electrode with metal top
C.  Contact point of electrode with metal bottom
D.  Contact layer o f meta ls to be welded
 \$(document).ready(function(){ \$(‘#loaddata1374’).click(function(){ qid1374=\$(‘#qid1374’).val(); section1374=\$(‘#section1374’).val(); type1374=\$(‘#type1374’).val(); subtype1374=\$(‘#subtype1374’).val(); \$.post(‘../../fav’,{ qid:qid1374, section: section1374, type: type1374, subtype: subtype1374 },function(ajaxresult){ \$(‘#getrequest1374’).html(ajaxresult); qid1374=\$(‘#qid1374’).val(”); section1374=\$(‘#section1374’).val(”); type1374=\$(‘#type1374’).val(”); subtype1374=\$(‘#subtype1374’).val(”); }); }); }); Explanation:- Answer : D

Q52. Arc blow (a welding defect) is generally encountered in
A.  arc welding using A.C. current
B.  arc welding using D.C. current
C.  thermit welding
D.  gas welding
 \$(document).ready(function(){ \$(‘#loaddata1375’).click(function(){ qid1375=\$(‘#qid1375’).val(); section1375=\$(‘#section1375’).val(); type1375=\$(‘#type1375’).val(); subtype1375=\$(‘#subtype1375’).val(); \$.post(‘../../fav’,{ qid:qid1375, section: section1375, type: type1375, subtype: subtype1375 },function(ajaxresult){ \$(‘#getrequest1375’).html(ajaxresult); qid1375=\$(‘#qid1375’).val(”); section1375=\$(‘#section1375’).val(”); type1375=\$(‘#type1375’).val(”); subtype1375=\$(‘#subtype1375’).val(”); }); }); }); Explanation:- Answer : B

Q53. Which of the following automatic weld­ing processes is likely to give maximum rate of metal deposition ?
A.  Continuous flux covered electrode
B.  Multiple power submerged arc
C.  Gas shielded bare wire
D.  Submerged arc (single wire)
 \$(document).ready(function(){ \$(‘#loaddata1376’).click(function(){ qid1376=\$(‘#qid1376’).val(); section1376=\$(‘#section1376’).val(); type1376=\$(‘#type1376’).val(); subtype1376=\$(‘#subtype1376’).val(); \$.post(‘../../fav’,{ qid:qid1376, section: section1376, type: type1376, subtype: subtype1376 },function(ajaxresult){ \$(‘#getrequest1376’).html(ajaxresult); qid1376=\$(‘#qid1376’).val(”); section1376=\$(‘#section1376’).val(”); type1376=\$(‘#type1376’).val(”); subtype1376=\$(‘#subtype1376’).val(”); }); }); }); Explanation:- Answer : B

Q54. During resistance weldingheat produced at the joint is proportional to
A.  I2R
B.  kVA
C.  current
D.  Voltage
 \$(document).ready(function(){ \$(‘#loaddata1377’).click(function(){ qid1377=\$(‘#qid1377’).val(); section1377=\$(‘#section1377’).val(); type1377=\$(‘#type1377’).val(); subtype1377=\$(‘#subtype1377’).val(); \$.post(‘../../fav’,{ qid:qid1377, section: section1377, type: type1377, subtype: subtype1377 },function(ajaxresult){ \$(‘#getrequest1377’).html(ajaxresult); qid1377=\$(‘#qid1377’).val(”); section1377=\$(‘#section1377’).val(”); type1377=\$(‘#type1377’).val(”); subtype1377=\$(‘#subtype1377’).val(”); }); }); }); Explanation:- Answer : A

Q55. Resistance welding cannot be used for
A.  dielectrics
B.  ferrous materials
C.  non-ferrous metals
D.  any of the above
 \$(document).ready(function(){ \$(‘#loaddata1378’).click(function(){ qid1378=\$(‘#qid1378’).val(); section1378=\$(‘#section1378’).val(); type1378=\$(‘#type1378’).val(); subtype1378=\$(‘#subtype1378’).val(); \$.post(‘../../fav’,{ qid:qid1378, section: section1378, type: type1378, subtype: subtype1378 },function(ajaxresult){ \$(‘#getrequest1378’).html(ajaxresult); qid1378=\$(‘#qid1378’).val(”); section1378=\$(‘#section1378’).val(”); type1378=\$(‘#type1378’).val(”); subtype1378=\$(‘#subtype1378’).val(”); }); }); }); Explanation:- Answer : A

A.  high flexibility
B.  high current handling capacity
C.  both (a) and (b)
D.  none of the above
 \$(document).ready(function(){ \$(‘#loaddata1379’).click(function(){ qid1379=\$(‘#qid1379’).val(); section1379=\$(‘#section1379’).val(); type1379=\$(‘#type1379’).val(); subtype1379=\$(‘#subtype1379’).val(); \$.post(‘../../fav’,{ qid:qid1379, section: section1379, type: type1379, subtype: subtype1379 },function(ajaxresult){ \$(‘#getrequest1379’).html(ajaxresult); qid1379=\$(‘#qid1379’).val(”); section1379=\$(‘#section1379’).val(”); type1379=\$(‘#type1379’).val(”); subtype1379=\$(‘#subtype1379’).val(”); }); }); }); Explanation:- Answer : C

Q57. During arc welding as the thickness of the metal to be welded increases
A.  current should decrease, voltage should increase
B.  current should increase, voltage remaining the same
C.  current should increase, voltage should decrease
D.  voltage should increase, current- remaining the same
 \$(document).ready(function(){ \$(‘#loaddata1380’).click(function(){ qid1380=\$(‘#qid1380’).val(); section1380=\$(‘#section1380’).val(); type1380=\$(‘#type1380’).val(); subtype1380=\$(‘#subtype1380’).val(); \$.post(‘../../fav’,{ qid:qid1380, section: section1380, type: type1380, subtype: subtype1380 },function(ajaxresult){ \$(‘#getrequest1380’).html(ajaxresult); qid1380=\$(‘#qid1380’).val(”); section1380=\$(‘#section1380’).val(”); type1380=\$(‘#type1380’).val(”); subtype1380=\$(‘#subtype1380’).val(”); }); }); }); Explanation:- Answer : B

Q58. The tips of the electrodes, for spot weld­ing, are made of
A.  copper alloy
B.  porcelain
C.  mica
D.  carbon
 \$(document).ready(function(){ \$(‘#loaddata1381’).click(function(){ qid1381=\$(‘#qid1381’).val(); section1381=\$(‘#section1381’).val(); type1381=\$(‘#type1381’).val(); subtype1381=\$(‘#subtype1381’).val(); \$.post(‘../../fav’,{ qid:qid1381, section: section1381, type: type1381, subtype: subtype1381 },function(ajaxresult){ \$(‘#getrequest1381’).html(ajaxresult); qid1381=\$(‘#qid1381’).val(”); section1381=\$(‘#section1381’).val(”); type1381=\$(‘#type1381’).val(”); subtype1381=\$(‘#subtype1381’).val(”); }); }); }); Explanation:- Answer : A

Q59. Steel pipes are manufactured by
A.  argon arc welding
B.  thermit welding
C.  resistance welding
D.  arc welding