60 Important Electrical Welding MCQ Question and Answer | PDF Free Download
1.Which of the following method is normally not preferred for welding of chromium molybdenum steels?
- AOxyacetylene welding
- BResistance welding
- CThermit welding
- DSubmerged arc welding
2.The welding of aluminium alloy entails which of the following problems?
- AHigh thermal conductivity-quick dissipating heat
- BOn melting become thin liquid-tendency to run off
- CLow specific resistance requiring heavy current
- DAll of the above
3.During carbon arc welding
- AElectrode is connected to neutral if AC is used
- BElectrode is not connected to any voltage source when AC is used
- CElectrode is negative with respect to the work if DC is used
- DElectrode is positive with respect to the work if DC is used
4.Weld spatter defect in welding is generally due to
- AToo high voltage during welding
- BToo high current during welding
- CLow voltage during welding
- DLow current during welding
5.Magnetic Arc blow is a welding defect generally encountered in
- AArc welding using AC current
- BArc welding using DC current
- CThermit welding
- DGas welding
6.Steel pipes are manufactured by
- AArgon arc welding
- BThermit welding
- CResistance welding
- DArc welding
7.A rectifier for welding has voltage current characteristic as
- AStatic
- BVariable
- CDrooping
- DRising
8.Which of the following is not a welding accessory?
- AHand screen
- BCable
- CElectrode holder
- DGloves
9.Grey iron is usually welded by
- AGas welding
- BTIG welding
- CMIG welding
- DArc welding
10.The welding load is always
- AContinuous but varying
- B Continuous and constant
- CIntermittent
- DNone of the above
11.Electrodes used for welding aluminium alloys are
- AHard drawn copper
- BCadmium copper
- CTungsten copper
- DNone of these
12.TIG welding is
- AThorium iodine gas welding
- BThermally induced gas welding
- CTemperature insulated gas welding
- DTungsten inert gas welding
13.The Flux used in TIG welding is
- ABorax
- BAmmonium chloride
- CAsh
- DNone
14.The recommended welding methods For the welding of aluminium alloys are
- AAcetylene-oxygen gas welding
- BDC arc welding
- CAC arc welding
- DTungsten arc welding
15.Which of the following automatic welding process is likely to give maximum rate of metal deposition?
- AContinuous flux covered electrode
- BMultiple power submerged arc
- CGas shielded bare wire
- DSubmerged arc (single wire)
16.A 10 SWG electrode usually operates in the current range
- A300 to 400 amperes
- B95 to 135 amperes
- C50 to 65 amperes
- D20 to 30 amperes
17.Which of the following electrodes will have least diameter?
- A20 SWG
- B16 SWG
- C14 SWG
- D4 SWG
18.The danger of shock is maximum
- ABefore welding
- BAfter arcing
- CDuring arcing
- DWhile inserting electrode into the holder
19.The welding electric circuit is
- ANever earthed
- BAlways earthed
- CThrough cables only
- DNone of these
20.Steel rails are welded by
- AGas welding
- BThermit welding
- CResistance welding
- DArgon arc welding