Welding MCQ Multiple Choice Questions Answers for Practice

Q: 1. In a gas cut plate, the cut shows grooves and has deep drag lines. This is due to

Correct Answer is: less oxygen pressure

Q: 2. One of the functions of electrode coating is

Correct Answer is: to stabilize the arc

Q: 4. Which one of the following is a temporary joint?

Correct Answer is: Press fit joint

Q: 5. In fusion welding, penetration is the ratio of

Correct Answer is: width of the weld to its depth

Q: 6. Which of the following joint have high corrosion resistance?

Correct Answer is: Welding joint

Q: 7. Which of the following is a design recommendation for welding?

Correct Answer is: The buildup of weld fillets should be kept to a minimum

Q: 9. Which of the following is not a resistance welding?

Correct Answer is: Pressure welding

Q: 10. The resistance welding process suitable for welding ferrous and non-ferrous metals upto 8mm thickness is

Correct Answer is: Spot welding

Q: 11. Which of the following is false regarding welding process and its corresponding minimum thickness of plate material?

Correct Answer is: Flux-Cored Weldments: minimum thickness - 4.5 mm

Q: 12. Which of the following welding process is used for welding of sheet metals in automobile and air craft industries?

Correct Answer is: Resistance welding

1. In a gas cut plate, the cut shows grooves and has deep drag lines. This is due to

too much travel speed
less oxygen pressure
smaller size cutting nozzle
tip too close to the cut surface

2. One of the functions of electrode coating is

to stabilize the arc
to prevent rusting
to control arc temperature
to increase welding current

3. In an acetylene cylinder, the acetylene is dissolved in

Carbon Dioxide
Acetone
Mercury
Water

4. Which one of the following is a temporary joint?

Riveted joint
Soldered joint
Press fit joint
Welded joint

5. In fusion welding, penetration is the ratio of

length of the weld to its depth
depth of the weld to its width
depth of the weld to its length
width of the weld to its depth

6. Which of the following joint have high corrosion resistance?

Riveted joint
Bolted joint
None of the above
Welding joint

7. Which of the following is a design recommendation for welding?

Welding should be done horizontally, with the stick or electrode holder pointing upward during welding
The buildup of weld fillets should be kept to a minimum
Locate welds where special finishing operations are required
Welded assemblies should have more parts

8. Which of the following processes do not use flux during welding?

Oxyfuel
Flux Cored Arc
Friction
Submerged Arc

9. Which of the following is not a resistance welding?

Butt welding
Pressure welding
Percussion welding
Spot welding

10. The resistance welding process suitable for welding ferrous and non-ferrous metals upto 8mm thickness is

Projection welding
Butt welding
Pressure welding
Spot welding

11. Which of the following is false regarding welding process and its corresponding minimum thickness of plate material?

Submerged Arc Weldments: minimum thickness - 4.5mm
Flux-Cored Weldments: minimum thickness - 4.5 mm
Gas-Metal Arc Weldments: minimum thickness - 0.5 mm and even thinner
Shielded-Metal Arc or Stick Weldments: minimum thickness - 1.5 mm

12. Which of the following welding process is used for welding of sheet metals in automobile and air craft industries?

Gas tungsten arc welding
Thermit welding
Resistance welding
Shield metal arc welding

13. Heat is created by the chemical reaction in

Oxy-acetylene welding
Tungsten arc welding
Thermit welding
Resistance welding

14. Which of the processes can be classified as solid state welding?

Electron beam welding
Diffusion welding
Resistance welding
Oxyfuel welding

15. Which flame is suitable for welding of ferrous metals, Cu and Al alloys?

Carburising flame
Neutral flame
None of the above
Oxidising flame

16. Which flame is suitable for cutting operations?

Carburising flame
Neutral flame
None of the above
Oxidising flame

17. Which flame is suitable for welding of non ferrous metals (brasses and bronzes)?

Carburising flame
Neutral flame
None of the above
Oxidising flame

18. Which flame is suitable for welding steel?

Carburising flame
Neutral flame
None of the above
Oxidising flame

19. Which of the following is false regarding material to be welded and its corresponding welding process?

higher-alloy steels - GMAW and GTAW welding
Stainless steel - GTAW, GMAW and shielded-metal arc welding
Aluminium alloys - GMAW or GTAW process
high-carbon steel - shielded-metal arc, flux-cored arc, and submerged arc welding

20. Which of the following is not true for gas welding?

It is suitable for thin sheets
It is slower than arc welding
There are safety problems in storing and handling the gases
Heat effected zone and distortion are less as compare to arc welding

21. Which of the welding processes utilize a non-consumable electrode?

Plasma Arc and Shielded Metal Arc
Shielded Metal Arc and Gas-Metal Arc
Gas-Metal Arc and Plasma Arc
Gas-tungsten Arc and Plasma Arc

22. Which of the following is an example of plastic welding?

Arc welding
Forge welding
Thermit welding
Gas welding

23. Which of the following welding process uses non-consumable electrode?

Shielded metal arc welding
CO2 shielded welding
Gas metal arc welding (MIG)
Gas tungsten arc welding (TIG)

24. Which of the following ray is not produced during welding?

Visible light rays
Infrared ray
Ultra violet rays
Gamma rays

25. In which of the following process, heat is created by blacksmith fire

Spot welding
Projection welding
Seam welding
Forge welding

26. Which of the following is not true in regard to welding joint?

Heavy in weight
Economical
Have a pleasing appearance
Exhibit excellent strength characteristics equal to or even stronger than the base component

27. The voltage needed in resistance welding does not depend upon

Area
Thickness of weld
Length of weld
Composition

28. The metals having good weldability, in descending order are

carbon steel, iron, cast steel, cast iron
iron, carbon steel, cast steel, cast iron
cast iron, iron, carbon steel, cast steel
cast steel, iron, carbon steel, cast iron

29. Which of the following types is not fillet weld?

lap joint
T-joint
Corner joint
butt joint

30. Which of the following is a weld joint?

T joints
Corner joints and edge joints
all of the above
butt and lap joints

Welding multiple-choice questions (MCQs) are essential for students and exam aspirants to test and enhance their knowledge of welding techniques and principles. Practice these questions to excel in your exams and career.

About Welding MCQ Questions

Welding MCQs cover a wide range of topics, including types of welding processes, safety procedures, equipment usage, and material properties. These questions are designed to help you understand the fundamental and advanced concepts of welding, ensuring you are well-prepared for any academic or professional challenge.

Why Practice Welding Objective Questions?

Practicing Welding MCQs offers several benefits. It helps you reinforce your understanding of key concepts, prepares you for exams, and enhances your problem-solving skills. Regular practice also boosts your confidence for interviews and ensures you are up-to-date with the latest welding techniques and standards.

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