TIG welding (MCQ)

MCQ ON THE TIG WELDING(GTAW)

Today in this exercise i will explain to you detail important question about TIG welding process . after this you will be able to know what are important question about this process, then you must read this exercise carefully step by step. I hope that after reading this , you will be able to learn that very well and it will be very helpful for you in the competition exam. so lets continue to understand further.

 All the important questions about TIG welding process are  given below

1. The welding process shown in Figure is .

  

    a) TIG        b) MIG        c) MAG       d) SAW

    Ans:- (a)

2. The melting point of tungsten is about ...

     a) 2600°C

     b) 3000°C

     c) 3400°C

     d) 3800°C

    Ans:- (c)

3. What type of current supply is best suited for Gas Tungsten Arc Welding of aluminium and its alloys?

    a) AC

    b) DC

    c) DCSP

    d) DCRP

    Ans:- (a)

4. The gas nozzle of the torch used for gas tungsten arc welding is made of

    a) Plastic 

    b) Glass

    c) Copper

    d) Ceramic

    Ans:- (d)

5. Argon is used in welding of stainless steel because

    a) It is inert 

    b) It help in melting the electrode

    c) It prevents porosity

    d) It is cheap

    Ans:- (a)

6. The two commonly used inert gases are 

    a) Argon and carbon dioxide

    b) Helium and carbon dioxide

    c) Carbon dioxide and nitrogen

    d) Argon and helium

    Ans:- (d)

7. There are five inert gases, of which argon and helium are the most common. The other three inert gases are

    a) Neon, Krypton, Xenon

    b) Neon, Hydrogen, Krypton

    c) Neon, Hydrogen, Xenon

    d) Xenon, Hydrogen, Krypton

    Ans:- (a)

8. It is a non-consumable electrode having high melting point. It is used in TIG welding. What is this electrode?

    a) Carbon electrode

    b) Copper electrode

    c) Aluminium electrode

    d) Tungsten electrode

    Ans:-(d)

9. Helium is .........times lighter than argon.

    a) Six

    b) Eight

    c) Ten

    d) Twelve

    Ans:- (c)

10. What is also referred as a GTAW?

    a) TIG welding

    b) MIG welding

    c) STUD welding

    d) GAS welding

    

    Ans:- (a)

11. What is marked as "X" ?

    a) Torch

    b) Shield

    c) Arc

    d) Filler

    Ans:-(b)

12. What is the angle of electrode tip by setting DCEN for SS welding by TIG welding process?

    a) 50°

    b) 40°

    c) 45°

    d) 60°

    Ans:- (d)

13. What is the tungsten electrode used for carbon steel & low alloy steel TIG welding?

    a) 5% thoriated tungsten electrode 

    b) 2% thoriated tungsten electrode

    c) 5% zirconiated tungsten electrode

    d) 2% zirconiated tungsten electrode

    Ans:- (b)

14. In TIG welding the tungsten electrode used in general is- 

    a) Pointed for DC welding and a spherical end for AC welding 

    b) Pointed for AC welding and a spherical end  for DC welding

    c) Pointed for DC welding and pointed for AC welding 

    d) Spherical end for DC welding and spherical end for AC welding

    Ans:- (a)

15. In welding magnesium with TIG arc welding, direct current with ____is used.

    a) Strsight polarity

    b) Reversed polarity 

    c) Both (a) & (b)

    d) None of these

    Ans:- 

16.Which of the following welding process used non-consumable electrode?

    a) TIG welding 

    b) MIG welding

    c) Manual arc welding 

    d) Submerged arc welding

    Ans:- (a)

17. Using TIG welding the easiest metal to weld is- 

    a) Aluminium

    b) Carbon Steel

    c) Low alloy steel

    d) Stainless Steel

    Ans:- (a)

18. The easiest joint to produce using GTAW is -

    a) Butt 

    b) Tee

    c) Lap

    d) Corner

    e) Edge

19. How is the inert gas directed to flow over weld pool, in TIG welding ?

    a) Through copper nozzle 

    b) Through brass nozzle 

    c) Through ceramic nozzle

    d) Through metal nozzle

    Ans:- (c)

20. What is the name of part of TIG welding torch for holding tungsten electrode ?

    a) Collect

    b) Adaptor

    c) Ceramic nozzle

    d) Electrode cap

    Ans:- (a)

21. What is the purpose of H.F. unit in TIG welding?

    a) To produce the AC

    b) To change AC to DC

    C) To produce power supply

    d) To initiate the arc without touching the electrode on base metal

    Ans:- (d)

22. What is the device used to show the volum of the inert gas allowed to go the welding torch in TIG welding /

    a) Flow meter

    b) CO2  regulator

    c) Pressure meter

    d) Argon regulator

    Ans:- (a)

23. Which type of tungsten electrode is suitable for welding of SS by TIG process with DC?

    a) Pure tungsten electrode 

    b) Cerium tungsten electrode 

    c) Thoriated tungsten electrode 

    d) Zirconium tungsten electrode

Ans:-( c) 

24. What is defect while TIG welding if the current is too low?

    a) Crack

    b) Porosity

    c) Under cut

    d) Lack of fusion

    Ans:-( d) 

25. What is the defect caused by high current in TIG welding?

    a) Crack

    b) Porosity

    c) Under cut

    d) Lack of fusion

    Ans:- (c)