ONLINE MCQ EE-ELECTRIC WELDING 4

Q31. In which of the following methods of welding the molten metal is poured for joining the metals ?
 A.  Thermit welding
 [Correct Answer]
 B.  Gas welding.
 [Wrong Answer]
 C.  TIG welding
 [Wrong Answer]
 D.  Arc welding
 [Wrong Answer]
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Q32. The welding of aluminium alloy entails which of the following problems ?
 A.  High tlermal conductivity quick dissipating heat
 [Wrong Answer]
 B.  On melting becomes thin liquid- tendency to run off
 [Wrong Answer]
 C.  Low specific resistance requiring heavy current
 [Wrong Answer]
 D.  All of the above
 [Correct Answer]
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Q33. TIG welding is
 A.  thorium iodine gas welding
 [Wrong Answer]
 B.  thermally induced gas welding
 [Wrong Answer]
 C.  temperature insulated gas welding
 [Wrong Answer]
 D.  tungsten inert gas welding
 [Correct Answer]
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Q34. In ultrasonic welding the frequency range is generally
 A.  2000 to 3000 Hz
 [Wrong Answer]
 B.  4000 to 20000 Hz
 [Correct Answer]
 C.  30000 to 40000 Hz
 [Wrong Answer]
 D.  50000 to 80000 Hz
 [Wrong Answer]
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Q35. Which of the following equipment is used for arc welding generally used for arc welding ?
 A.  Single phase alternator
 [Wrong Answer]
 B.  Two phase alternator
 [Wrong Answer]
 C.  Three phase alternator
 [Wrong Answer]
 D.  Transformer
 [Correct Answer]
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Q36. In spot welding composition and thickness of the base metal decides
 A.  the amount of squeeze pressure
 [Wrong Answer]
 B.  hold time
 [Wrong Answer]
 C.  the amount of weld current
 [Wrong Answer]
 D.  all above
 [Correct Answer]
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Q37. Motor-generator set for D.C. arc welding has generator of
 A.  series type
 [Wrong Answer]
 B.  shunt type
 [Wrong Answer]
 C.  differentially compound type
 [Wrong Answer]
 D.  level compound type
 [Correct Answer]
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Q38. In atomic hydrogen welding the electrode is made of
 A.  carbon
 [Wrong Answer]
 B.  graphite
 [Wrong Answer]
 C.  tungsten
 [Correct Answer]
 D.  mild steel
 [Wrong Answer]
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Q39. During carbon arc welding
 A.  electrode is connected to neutral if A.C. is used
 [Wrong Answer]
 B.  electrode is not connected to any voltage source when A.C. is used
 [Wrong Answer]
 C.  electrode is negative with respect to the work if D.C. is used
 [Correct Answer]
 D.  electrode is positive with respect to the work if D.C. is used
 [Wrong Answer]
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Q40. Flux used in TIG welding is
 A.  borax
 [Wrong Answer]
 B.  ammonium chloride
 [Wrong Answer]
 C.  ash
 [Wrong Answer]
 D.  none
 [Correct Answer]
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ONLINE MCQ EE-ELECTRIC WELDING 5
ONLINE MCQ EE-ELECTRIC WELDING 3

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