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Test Yourself in Electric Welding
1. The basic electrical requirement in arc welding is that there should be
A. coated electrodes
B. high open-circuit voltage --> Ans
C. no arc blow
D. dc power supply
2. Welding is not done directly from the supply mains because
A. it is customary to use welding machines
B. its voltage is too high
C. its voltage keeps fluctuating
D. it is impractical to draw heavy currents -->Ans
3. AC welding machine cannot be used for ____ welding.
A. MIG --> Ans
B. atomic hydrogen
C. resistance
D. submerged arc
4. In electrical welding, arc blow can be avoided by
A. using bare electrodes
B. welding away from earth ground connection
C. using ac welding machines ---> Ans
D. increasing arc length
5. In DCSP welding
A. electrode is the hottest
B. workpiece is relatively cooler
C. base metal penetration is deep --> Ans
D. heavily-coated electrodes are used
6. Overhead welding position is thought to be the most ______.
A. hazardous ---> Ans
B. difficult
C. economical
D. useful
7. The ultimate aim of using electrode coating is to
A. provide shieding to weld pool
B. prevent atmospheric contamination
C. improve bead quality --> Ans
D. cleanse the base metal
8. In electrode-positive welding, _____ of the total heat is produced at the electrode.
A. one-third
B. two-third --> Ans
C. one-half
D. one-fourth
9. Submerged arc process is characterized by
A. deep penetration
B. high welding current
C. exceptionally smooth beads
D. all of the above --> Ans
10. The major disadvantage of carbon arc welding is that
A. there is occurence of blow holes --> Ans
B. electrodes are consumed fast
C. separate filler rod is needed
D. bare electrodes are necessary
11. In atomic hydrogen welding, electrodes are long lived because
A. two are used at a time
B. arc is in the shape of a fan
C. ac supply is used --> Ans
D. it is a non-pressure process
12. Unlike TIG welding, MIG welding
A. requires no flux
B. uses consumable electrodes --> Ans
C. provides complete protection from atmospheric contamination
D. requires no post-weld cleansing
13. The major power supply used in MIG welding is
A. ac supply
B. DCSP
C. electrode-negative
D. DCRP --> Ans
14. MIG welding process is becoming increasingly popular in welding industry mainly because of
A. its easy operation
B. its high metal deposit rate
C. its use in both ferrous and non-ferrous metals
D. both its easy operation and its high metal deposit rate --> Ans
15. A weld bead of wineglass design is produced in _____ welding.
A. plasma arc --> Ans
B. laser
C. electron beam
D. MAG
16. Spot welding process basically depends on
A. ohmic resistance
B. generation of heat
C. application of forging pressure
D. generation of heat and application of forging pressure --> Ans
17. Electric resistance seam welding uses _____ electrodes.
A. pointed
B. disc --> Ans
C. flat
D. domed
18. Projection welding can be regarded as a mass production form of ______ welding.
A. seam
B. butt
C. spot --> Ans
D. upset
19. In the process of electroslag welding, theoretically there is no upper limit to the
A. thickness of weld lead --> Ans
B. rate of metal deposit
C. slag bath-temperature
D. rate of slag consumption
20. High temperature metals like columbium can be easily welded by _____ welding.
A. flash
B. MIG
C. TIG
D. electron beam ---> Ans
News Archive go back to home A. coated electrodes
B. high open-circuit voltage --> Ans
C. no arc blow
D. dc power supply
2. Welding is not done directly from the supply mains because
A. it is customary to use welding machines
B. its voltage is too high
C. its voltage keeps fluctuating
D. it is impractical to draw heavy currents -->Ans
3. AC welding machine cannot be used for ____ welding.
A. MIG --> Ans
B. atomic hydrogen
C. resistance
D. submerged arc
4. In electrical welding, arc blow can be avoided by
A. using bare electrodes
B. welding away from earth ground connection
C. using ac welding machines ---> Ans
D. increasing arc length
5. In DCSP welding
A. electrode is the hottest
B. workpiece is relatively cooler
C. base metal penetration is deep --> Ans
D. heavily-coated electrodes are used
6. Overhead welding position is thought to be the most ______.
A. hazardous ---> Ans
B. difficult
C. economical
D. useful
7. The ultimate aim of using electrode coating is to
A. provide shieding to weld pool
B. prevent atmospheric contamination
C. improve bead quality --> Ans
D. cleanse the base metal
8. In electrode-positive welding, _____ of the total heat is produced at the electrode.
A. one-third
B. two-third --> Ans
C. one-half
D. one-fourth
9. Submerged arc process is characterized by
A. deep penetration
B. high welding current
C. exceptionally smooth beads
D. all of the above --> Ans
10. The major disadvantage of carbon arc welding is that
A. there is occurence of blow holes --> Ans
B. electrodes are consumed fast
C. separate filler rod is needed
D. bare electrodes are necessary
11. In atomic hydrogen welding, electrodes are long lived because
A. two are used at a time
B. arc is in the shape of a fan
C. ac supply is used --> Ans
D. it is a non-pressure process
12. Unlike TIG welding, MIG welding
A. requires no flux
B. uses consumable electrodes --> Ans
C. provides complete protection from atmospheric contamination
D. requires no post-weld cleansing
13. The major power supply used in MIG welding is
A. ac supply
B. DCSP
C. electrode-negative
D. DCRP --> Ans
14. MIG welding process is becoming increasingly popular in welding industry mainly because of
A. its easy operation
B. its high metal deposit rate
C. its use in both ferrous and non-ferrous metals
D. both its easy operation and its high metal deposit rate --> Ans
15. A weld bead of wineglass design is produced in _____ welding.
A. plasma arc --> Ans
B. laser
C. electron beam
D. MAG
16. Spot welding process basically depends on
A. ohmic resistance
B. generation of heat
C. application of forging pressure
D. generation of heat and application of forging pressure --> Ans
17. Electric resistance seam welding uses _____ electrodes.
A. pointed
B. disc --> Ans
C. flat
D. domed
18. Projection welding can be regarded as a mass production form of ______ welding.
A. seam
B. butt
C. spot --> Ans
D. upset
19. In the process of electroslag welding, theoretically there is no upper limit to the
A. thickness of weld lead --> Ans
B. rate of metal deposit
C. slag bath-temperature
D. rate of slag consumption
20. High temperature metals like columbium can be easily welded by _____ welding.
A. flash
B. MIG
C. TIG
D. electron beam ---> Ans