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Free download in PDF Welding Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Forge welding is best suited for.......
[A]
Stainless steel
[B]
High carbon steel
[C]
Cast iron
[D]
Wrought iron
(2)
In arc welding, temperature of the following order may be granted......
[A]
1000oC
[B]
1500oC
[C]
5500oC
[D]
8000oC
(3)
Which of the following is strongest for brazing joints.......
[A]
Butt
[B]
Scarf (inclined)
[C]
Lap
[D]
All are equally strong
(4)
Equipment is used for arc welding a material by carbon electrode.......
[A]
A.C. welding set
[B]
Rectifier
[C]
Motor generator
[D]
D.C. welding set with straight polarity
Answer: D.C. welding set with straight polarity
(5)
In reverse polarity welding.......
[A]
Electrode holder is connected to the negative and work to positive
[B]
Electrode holder is connected to the positive and work to negative
[C]
Work is positive and holder is earthed
[D]
Holder is positive and work is earthed
Answer: Electrode holder is connected to the positive and work to negative
(6)
In MIG welding, the metal is transferred in the form of.......
[A]
A fine spray of metal
[B]
Molten drops
[C]
Weld pool
[D]
Molecules
Answer: A fine spray of metal
(7)
Distortion in welding occures due to......
[A]
Use of excessive current
[B]
Improper clamping methods
[C]
Use of wrong electrodes
[D]
Oxidation of weld pool
Answer: Improper clamping methods
(8)
In inter gas arc welding following is used for welding alluminium.......
[A]
No-combustible electrode in combination with helium and d.c. current
[B]
Combustible electrodes and argon in combination with a.c. current
[C]
Straight polarity d.c. current
[D]
Carbon dioxide, because of its excellent penetration and high speed
Answer: Combustible electrodes and argon in combination with a.c. current
(9)
In inter gas arc welding following is used for welding magnesium.......
[A]
No-combustible electrode in combination with helium and d.c. current
[B]
Combustible electrodes and argon in combination with a.c. current
[C]
Straight polarity d.c. current
[D]
Carbon dioxide, because of its excellent penetration and high speed
Answer: No-combustible electrode in combination with helium and d.c. current
(10)
Carbon arc welding is.......
[A]
A process which uses a mixture of iron oxide and granular aluminium
[B]
Accomplished by maintaining a hot molten metal pool between plates
[C]
Used to weld carbon rods
[D]
None of the above
Answer: None of the above
(11)
Thermit welding.......
[A]
A process which uses a mixture of iron oxide and granular aluminium
[B]
Accomplished by maintaining a hot molten metal pool between plates
[C]
A process in which arc is maintained under blanket of flux
[D]
In no welding process
Answer: A process which uses a mixture of iron oxide and granular aluminium
(12)
The most commonly used flame in gas welding is......
[A]
Neutral
[B]
Oxidising
[C]
Carburising
[D]
All of the above
(13)
Arc-welding uses following electric supply .........
[A]
A.C.
[B]
D.C.
[C]
Both AC and DC
[D]
Spiral waveform
(14)
The electroslag welding is.......
[A]
A process which uses a mixture of iron oxide and granular aluminium
[B]
Accomplished by maintaining a hot molten metal pool between plates
[C]
A process in which arc is maintained under a blanket of flux
[D]
There is nothing called electroslag
Answer: Accomplished by maintaining a hot molten metal pool between plates
(15)
Submerged arc welding is.......
[A]
A process which uses a mixture of iron oxide and granular aluminium
[B]
Accomplished by maintaining a hot molten metal pool between plates
[C]
A process in which arc is maintained under a blanket of flux
[D]
All of the above
Answer: A process in which arc is maintained under a blanket of flux
(16)
TIG welding is best suited for welding.......
[A]
Mild welding
[B]
Stainless steel
[C]
Carbon steel
[D]
Aluminium
(17)
Thermit welding is a form of......
[A]
Resistance welding
[B]
Gas welding
[C]
Fusion welding
[D]
Forge welding
(18)
Seam-welding is.........
[A]
Multi-spot welding process
[B]
Continuous spot welding process
[C]
Used to form mesh
[D]
Used for welding cylindrical objects
Answer: Continuous spot welding process
(19)
Projection welding is.......
[A]
Multi-spot welding process
[B]
Continuous spot welding process
[C]
Used to form mesh
[D]
Used to make cantilevers
Answer: Multi-spot welding process
(20)
Cross-wire welding is.......
[A]
Multi-spot welding process
[B]
Continuous spot welding process
[C]
Used to form mesh
[D]
Used where additional strength is desired
Answer: Used to form mesh
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