Welding Test Questions And Answers

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Welding Test Questions And Answers - Quiz

Welcome to the Welding Test Questions and Answers Quiz! This quiz is designed to test your knowledge and understanding of welding principles, techniques, and safety protocols. Whether you are a welding enthusiast, a student studying welding, or a professional welder, this quiz will challenge your expertise in this essential trade.

Put your welding knowledge to the test and see if you can weld your way to a perfect score!
Are you ready to strike an arc and dive into the world of welding? Grab your helmet and electrodes, and let's get started on this exciting journey through the Welding Test Questions Read moreand Answers Quiz!


Welding Test Questions and Answers

  • 1. 

    What is an "inert gas" as used in Metal Inert Gas (MIG) Welding?

    • A.

      A gas that cools the weld zone to prevent cracking.

    • B.

      A gas that prevents porosity by burning a hot neutral flame.

    • C.

      A gas that does not chemically react with other elements to help produce a quality weld.

    • D.

      A gas that heats up the weld zone to create a better quality weld.

    Correct Answer
    C. A gas that does not chemically react with other elements to help produce a quality weld.
    Explanation
    An "inert gas" used in Metal Inert Gas (MIG) Welding is a gas that does not chemically react with other elements. This is important because it helps produce a quality weld by preventing any unwanted reactions or contamination during the welding process. By using an inert gas, the weld zone remains stable and free from any chemical reactions that could weaken the weld or introduce impurities.

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  • 2. 

    Stick (Arc) Welding uses a coated electrode; what is the purpose of this coating?

    • A.

      The coating insulates the welder from electric shocks.

    • B.

      The coating helps clean the weld zone from contaminants such as rust or paint.

    • C.

      The coating prevents water from damaging the electrode.

    • D.

      The coating produces a protective gas to prevent porosity.

    Correct Answer
    D. The coating produces a protective gas to prevent porosity.
    Explanation
    The purpose of the coating on a stick (arc) welding electrode is to produce a protective gas that prevents porosity. Porosity refers to the presence of small holes or voids in the weld, which can weaken its strength and integrity. The coating on the electrode generates a gas that shields the molten weld pool from the surrounding atmosphere, preventing the formation of these voids. This helps to ensure a stronger and more reliable weld.

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  • 3. 

          Which weld procedure is safe to perform in wet conditions?      

    • A.

      Oxy Welding

    • B.

      Arc Welding

    • C.

      MIG Welding

    • D.

      TIG Welding

    • E.

      None of the Above

    Correct Answer
    E. None of the Above
    Explanation
    None of the welding procedures listed—Oxy Welding, Arc Welding, MIG Welding, or TIG Welding—are safe to perform in wet conditions. Wet conditions pose a significant risk of electric shock, especially in processes involving electricity such as Arc Welding, MIG Welding, and TIG Welding.

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  • 4. 

    What is the minimum recommended filter shade on a welding helmet to protect your eyes?

    • A.

      Shade 10

    • B.

      Shade 13

    • C.

      Shade 5

    • D.

      Clear lens

    Correct Answer
    A. Shade 10
    Explanation
    The minimum recommended filter shade on a welding helmet to protect your eyes is Shade 10. This shade provides enough protection to shield your eyes from the intense light and harmful radiation produced during welding. A lower shade number may not provide sufficient protection, while a higher shade number may make it difficult to see the welding process clearly.

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  • 5. 

     What type of respiratory protection is the minimum required when welding? 

    • A.

      Dust mask

    • B.

      P2 Respirator

    • C.

      No protection is required.

    • D.

      Hazmat suit

    Correct Answer
    B. P2 Respirator
    Explanation
    The minimum required respiratory protection when welding is a P2 Respirator. This type of respirator is specifically designed to filter out fine particles such as welding fumes, which can be harmful to breathe in. The P2 Respirator provides a higher level of protection compared to a dust mask, and it is necessary to ensure the safety and health of the welder. A hazmat suit is not required for welding as it is designed for protection against hazardous materials in a different context.

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  • 6. 

    How would you prepare heavily rusted mild steel for welding?

    • A.

      Wash with soap and water.

    • B.

      Grind back to bare metal.

    • C.

      Nothing, I would weld over it.

    • D.

      Give it light sand with 240 grit sandpaper.

    Correct Answer
    B. Grind back to bare metal.
    Explanation
    To prepare heavily rusted mild steel for welding, it is necessary to grind back to bare metal. This is because welding over rusted metal can result in weak and unreliable welds. Grinding back to bare metal removes the rust and any other contaminants, ensuring a clean surface for proper welding.

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  • 7. 

    What type of weld would you do to form a T shape between two pieces of flat bar?

    • A.

      Butt

    • B.

      Fillet

    • C.

      Edge

    • D.

      Outside Corner

    Correct Answer
    B. Fillet
    Explanation
    To form a T shape between two pieces of flat bar, a fillet weld would be used. A fillet weld is a type of weld that is used to join two pieces of metal at a right angle, forming a T shape. It is commonly used in structural applications where strength and stability are required. The fillet weld is formed by creating a triangular-shaped bead of weld metal along the joint, providing a strong and durable connection between the two flat bars.

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  • 8. 

    Which of the following is an advantage of MIG welding?

    • A.

      It works well in the wind.

    • B.

      You can safely weld in wet conditions with it.

    • C.

      It takes less operator skill than other weld types.

    • D.

      It is slow and accurate, which is good for very thin metal.

    Correct Answer
    C. It takes less operator skill than other weld types.
    Explanation
    MIG welding has the advantage of requiring less operator skill compared to other types of welding. This is because MIG welding uses a wire electrode that is continuously fed, making it easier to control and manipulate the welding process. It also provides better control over the heat input, resulting in less distortion and warping of the metal being welded. This makes MIG welding a preferred choice for beginners or those who have limited welding experience.

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  • 9. 

    How would you prepare a 25mm low carbon steel flat bar for a butt weld?

    • A.

      Give it a quick grind to make sure the metal is clean.

    • B.

      Grind a single bevel preparation.

    • C.

      Nothing

    • D.

      Grind a double V preparation

    Correct Answer
    D. Grind a double V preparation
    Explanation
    To prepare a 25mm low carbon steel flat bar for a butt weld, the correct approach is to grind a double V preparation. This involves grinding a V-shaped groove on both sides of the bar, creating a channel for the weld to fill. This preparation ensures better penetration and a stronger weld joint.

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  • 10. 

    What two items on a MIG welder would need to be changed when changing from a 0.9mm mild steel wire electrode to a 1.2mm mild steel wire electrode?

    • A.

      Contact tip and shroud.

    • B.

      Contact tip and drive rollers.

    • C.

      Gas diffuser and drive rollers.

    • D.

      Gas bottle and earth clamp.

    Correct Answer
    B. Contact tip and drive rollers.
    Explanation
    When changing from a 0.9mm mild steel wire electrode to a 1.2mm mild steel wire electrode on a MIG welder, the contact tip and drive rollers would need to be changed. The contact tip is responsible for guiding the wire electrode to the welding point, and since the diameter of the wire has changed, a different contact tip is required to ensure proper alignment. Similarly, the drive rollers are responsible for feeding the wire electrode through the welder, and since the diameter of the wire has changed, the drive rollers need to be adjusted or replaced to accommodate the larger diameter.

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  • 11. 

    What treatment is recommended after welding stainless steel?

    • A.

      No treatment is required for stainless.

    • B.

      Quench in water to remove oxides.

    • C.

      Apply the pickling paste.

    • D.

      Oil to stop rust

    Correct Answer
    C. Apply the pickling paste.
    Explanation
    After welding stainless steel, it is recommended to apply the pickling paste. This is because welding stainless steel can cause the formation of oxides on the surface, which can lead to corrosion. Applying the pickling paste helps to remove these oxides and restore the stainless steel's corrosion resistance. It is an effective treatment method to ensure the longevity and durability of the stainless steel after welding.

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  • 12. 

    When performing a fillet weld between two pieces of 5mm thick mild steel, what is the recommended size (leg length) of the weld? (when not given a size)

    • A.

      5mm

    • B.

      10mm

    • C.

      7.5mm

    • D.

      3mm

    Correct Answer
    A. 5mm
    Explanation
    When performing a fillet weld between two pieces of 5mm thick mild steel, the recommended size (leg length) of the weld is 5mm. This means that the length of each leg of the weld should be 5mm. A fillet weld is a type of weld that joins two pieces of metal at a right angle, and the leg length refers to the distance from the root of the weld to the toe. In this case, since the thickness of the steel is 5mm, it is recommended to have a leg length of 5mm for the weld.

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  • 13. 

    If you found a tool to be faulty or dangerous, what should you do?

    • A.

      Put it back in the store.

    • B.

      Only use it one more time, then get it fixed.

    • C.

      Take it out of service, report it, and if required, tag it.

    • D.

      Do nothing

    Correct Answer
    C. Take it out of service, report it, and if required, tag it.
    Explanation
    If you find a tool to be faulty or dangerous, the correct course of action is to take it out of service to prevent any potential harm or accidents. Additionally, it is important to report the issue to the appropriate authorities or supervisors so that they can address the problem and take necessary actions to fix or replace the tool. If required, tagging the tool can help to clearly indicate that it is not safe for use, ensuring that others are aware of the issue and do not attempt to use it.

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  • 14. 

    Why shouldn't you wear nylon clothing when welding?

    • A.

      Because you will get too sweaty.

    • B.

      It is fine to wear.

    • C.

      Because static electricity can build up cause shocks.

    • D.

      Because it can catch fire easily and melt to your skin.

    Correct Answer
    D. Because it can catch fire easily and melt to your skin.
    Explanation
    Nylon is a synthetic material that is known to be highly flammable. When exposed to high temperatures, such as those encountered during welding, nylon clothing can catch fire and melt. This poses a significant safety hazard as molten nylon can cause severe burns to the skin. Therefore, it is essential to avoid wearing nylon clothing when engaging in activities like welding, where there is a risk of exposure to intense heat and sparks.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jun 12, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 25, 2014
    Quiz Created by
    Houseboatbilly
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