ONLINE MCQ EE-ELECTRIC WELDING 1

Q1. Electric arc welding process produces temperature upto
 A.  1000°C
 [Wrong Answer]
 B.  1500°C
 [Wrong Answer]
 C.  3500°C
 [Wrong Answer]
 D.  5550°C
 [Correct Answer]
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Q2. Air craft body is
 A.  spot welded
 [Wrong Answer]
 B.  gas welded
 [Wrong Answer]
 C.  seam welded
 [Wrong Answer]
 D.  riveted
 [Correct Answer]
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Q3. In D.C. arc welding
 A.  electrode is made positive and work- piece negative
 [Wrong Answer]
 B.  electrode is made negative and workpiece positive
 [Correct Answer]
 C.  both electrode as well as workpiece are made positive
 [Wrong Answer]
 D.  both electrode as well as workpiece are made negative
 [Wrong Answer]
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Q4. During spot welding the current flows for
 A.  fraction of a minute to several minutes
 [Wrong Answer]
 B.  fraction of a second to several seconds
 [Correct Answer]
 C.  few milliseconds
 [Wrong Answer]
 D.  few microseconds
 [Wrong Answer]
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Q5. A rectifier for welding has voltage/cur­rent characteristic as
 A.  static
 [Wrong Answer]
 B.  variable
 [Wrong Answer]
 C.  drooping
 [Correct Answer]
 D.  rising
 [Wrong Answer]
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Q6. Which of the following electrodes will have leastliameter ?
 A.  20 SWG
 [Correct Answer]
 B.  16 SWG
 [Wrong Answer]
 C.  14 SWG
 [Wrong Answer]
 D.  4 SWG
 [Wrong Answer]
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Q7. The metal surfaces for electrical resistance welding must be
 A.  lubricated
 [Wrong Answer]
 B.  cleaned
 [Correct Answer]
 C.  moistened
 [Wrong Answer]
 D.  rough
 [Wrong Answer]
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Q8. Increased heat due to shorter arc is harmful on account of
 A.  under-cutting of base material
 [Wrong Answer]
 B.  burn through
 [Wrong Answer]
 C.  excessive porosity
 [Wrong Answer]
 D.  all of the above
 [Correct Answer]
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Q9. For arc welding current range is usual­ly
 A.  10 to 15A
 [Wrong Answer]
 B.  30 to 40 A
 [Wrong Answer]
 C.  50 to 100 A
 [Wrong Answer]
 D.  100 to 350 A
 [Correct Answer]
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Q10. The purpose of coating on arc welding electrodes is to
 A.  stabilise the arc
 [Wrong Answer]
 B.  provide a protecting atmosphere
 [Wrong Answer]
 C.  provide slag to protect the molten metal
 [Wrong Answer]
 D.  all of the above
 [Correct Answer]
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ONLINE MCQ EE-ELECTRIC WELDING 2
QUIZ OF DAY-17/02/2017 GK & CURRENT AFFAIRS

One Response

  1. Satish kurrey January 15, 2018

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