1. Arc Welding involves_________ between electrode and work piece.
a) High Voltage & High Current c) High Voltage & Low Current
b) Low Voltage & High Current
d) Low Voltage & Low Current
2. What kind of power source has been used in GTAW process?
a) Constant Current
b) Constant Voltage
c) Pulse Mode
d) Spray Mode
3. To be most effective, visual inspection should be performed:
a) before welding
b) during welding
c) after welding
d) all the above
4. The ratio of load on time allowed to specified test interval time can be defined as
a) Duty cycle
b) OCV
b) c) Input voltage
d) all the above
5. Constant current power sources are referred as ……….
a) Variable voltage power source b) Constant potential power sources
6. In which of following method will melt the base metals?
a) Welding
b) Brazing
c) Soldering
d) All of the above
7. In arc welding, the arc length directly relates to
a) Current
b) Voltage
c) Both a & B
8. In E 7018 – What does 70 mean?
a) 70 Ksi Tensile strength
c) Both a & b
d) None of the above
b) 70 Ksi Yield strength
d) only
9. The distance between the root and toe of a fillet weld is called
(A) root gap
(B) leg length
(C) reinforcement
(D) throat thickness
10.Lack of penetration in a butt-welded joint is due to
(A) too low welding speed
(B) short arc length
(C) high current
(D) low current
11.What is the major function of the coating on an arc welding electrode?
a) Acts as a scavenger, removes oxides and impurities
b) Influences incomplete penetration
c) Liquefies the base metal
d) Adds moisture and accelerates the cooling rate
12. In which type of Volt-Amp characteristics Self-regulating arc will occur?
a) Constant Current
c) Pulse Mode
b) Constant Voltage
d) Spray Mode
13. What is the major function of the coating on an arc welding electrode?
a. Acts as a scavenger, removes oxides and impurities
b. Influences incomplete penetration
c. Liquefies the base metal
14. In SMAW, Arc volatage can be determined by ______
a) Arc length
b) Ampere c) Electrode Dia
d) None of the above
15. For heavy thickness steel plate welding, GTAW process mostly used with
_______
a) Straight polarity b) Reverse Polarity C) both a & B d) DCEP
16. In GTAW, Width & penetration of weld majorly depends on____________
a) Current
b) Travel speed
c) Wire feed d) Arc length
17. The amount of energy produced by arc is ____________
a) Directly proportional to current & Voltage
b) Indirectly proportional to current & voltage
c) Directly proportional to current only
d) Directly proportional to voltage only
18. In GTAW process, the tungsten is ____________
a) Source of electrons
b) Serves as electrical terminal
c) Both a & b
d) None of the above
19. Why do we sharpening the Tungsten in GTAW?
a) for more penetration
b) for getting wider bead
c) for producing optimum arc stability
d) to avoid tungsten inclusion
20. In GMAW process, which mode of metal transfer is suitable for thin section
welding?
a) Spray transfer
b) Short circuit
c) Globular transfer d) Both a & b
21. In GMAW, Globular transfer is characterized by a drop size with a diameter
___________
a) less than that of electrode dia
b) equal to that of electrode dia
c) greater than that of electrode dia
d) grater than that of contact tip dia
22. Which of the following combination will support Spray transfer mode in
GMAW?
a) Argon rich gas with DCEP
b) above transition current
c) Both a & b
d) B only
23. If electrons flow from negative to positive terminal, then this can be called as
a) Straight polarity b) Reverse polarity c) Both a & b d) b only
24. The distance between end of contact tube and the end of electrode is
_____________
a) Arc length b) Electrode Extension
c) stand off distance d) CTWD
25. Which of the following sequence is correct based on density of shielding
gases?
a) He>Ar>air
b) Ar > He > Air
c) Air > Ar> He
d) Air > He > Ar
26. In E70T1-C, what does the term ‘0’ indicate?
a) Welding position
b) Performance capabilities
c) Tensile strength
d) Single pass
27. Statement A: Increasing the current increases electrode deposition
Statement B: Excessive current produces convex bead
a) Both statements are correct
b) Both statements are wrong
c) Statement A only correct
d) Statement B only correct
28. What is/are the defects that are associated with FCAW process?
a) Worm track
b) Tungsten inclusion
c) Porosity
d) Both a & c
29. In SAW process, what are the type of fluxes based on manufacturing?
a) Basic flux & Acidic flux
b) Fused flux & Agglomerated flux
c) Active flux & Neutral flux
d) Both a & c
30. F7A2 -EH10K - What does the term ‘A’ refers?
a) Tensile strength
c) Agglomerated flux
b) Heat treatment
d) Impact test
31. In SAW welding process, increase in voltage increases
a) Bead shape
b) Flux consumption
c) pick up of alloying elements
d) All the above
32. In SAW welding, what is/are the most suitable reason for Pock marks?
a) Higher flux burden
b) High voltage
c) High travel speed
d) None
33. Why do we do preheat?
a) To slow the cooling rate
b) To remove moisture
c) To reduce the temperature gradient between base metal & weld metal
d) All of the above
34. Preheating depends on the ____________
a) Alloying elements
b) Thickness of material
c) Welding parameters
d) Both a & b
35. Which of following statement(s) is/are correct regarding purging?
Statement A: Steels that are having more than 5% Cr usually receives purging
Statement B: Purging is to prevent root weld metal from oxidation
a) Both are wrong
b) Both are correct
c) A only correct
d) B only correct