Welding Safety Test 2019-20

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  • 1/62 Questions

    Gas cylinders must  be chained or secured at all times.

    • True
    • False
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About This Quiz

Welding is the process of joining materials – usually metals or thermoplastics – by causing fusion, a method of metal-joining technique that involves melting the base metal. Must pass the test with a 80% or better to enter the shop.

Welding Safety Test 2019-20 - Quiz

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  • 2. 

    Burns are some of the most common and painful injuries in a welding shop.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Burns are indeed some of the most common and painful injuries in a welding shop. This is because welding involves working with high temperatures, sparks, and molten metal, which can easily cause burns if proper safety precautions are not followed. Welders are at risk of getting burns from direct contact with hot materials, as well as from sparks and splatter. These burns can range from mild to severe, causing pain, blistering, and even permanent scarring. Therefore, it is important for welders to wear appropriate protective clothing and follow safety guidelines to prevent these types of injuries.

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  • 3. 

    Eye protection must be used to:

    • Improve your vision

    • Prevent eyestrain

    • Prevent flying particles, foreign objects or corrosive agents from entering your eye

    • Magnify small objects

    Correct Answer
    A. Prevent flying particles, foreign objects or corrosive agents from entering your eye
    Explanation
    Eye protection must be used to prevent flying particles, foreign objects, or corrosive agents from entering your eye. This is important because these substances can cause serious damage to the eye and potentially lead to vision loss or other eye injuries. Eye protection, such as safety glasses or goggles, creates a barrier between the eye and these hazards, reducing the risk of injury and ensuring the safety of the eyes.

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  • 4. 

    Loose clothing, jewelry, and long hair must be securely fastened or removed:

    • Before operating any machines

    • Before the end of class

    • Only when the instructor is watching

    • Only when it will not affect your image

    Correct Answer
    A. Before operating any machines
    Explanation
    Loose clothing, jewelry, and long hair must be securely fastened or removed before operating any machines to ensure safety. Loose clothing or jewelry can get caught in the moving parts of the machines, leading to accidents or injuries. Long hair should also be tied back to prevent it from getting tangled in the machinery. By securely fastening or removing these items, the risk of accidents or injuries can be significantly reduced.

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  • 5. 

    All accidents and injuries, no matter how slight, must be:

    • Ignored

    • Reported to the high school office

    • Reported to the instructor immediately

    • None of the above

    Correct Answer
    A. Reported to the instructor immediately
    Explanation
    In the event of accidents or injuries, it is important to report them to the instructor immediately. This is necessary to ensure that appropriate action can be taken promptly to address any potential risks or provide necessary medical assistance. Reporting to the instructor allows for proper documentation and communication, which can help in preventing future incidents and ensuring the safety of everyone involved. Ignoring or reporting to the high school office may lead to delays in addressing the situation and could potentially worsen the condition.

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  • 6. 

    Report any breakage or damage to tools, instruments, or machinery:

    • To no-one, just fix it. You might get in trouble

    • To the instructor when everyone leaves so no-one thinks you did it

    • To the instructor immediately

    • To a friend and then fix it together

    Correct Answer
    A. To the instructor immediately
    Explanation
    The correct answer is to report any breakage or damage to the instructor immediately. This is important because the instructor needs to be aware of any issues with tools, instruments, or machinery in order to address them promptly and ensure the safety of everyone using them. Reporting the problem to the instructor immediately also shows responsibility and accountability for any damage that may have occurred.

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  • 7. 

    Long hair, loose-fitting clothes, and ties are personal safety hazards around rotating equipment.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Long hair, loose-fitting clothes, and ties can easily get caught in rotating equipment, posing a serious risk of injury. When hair or clothing gets entangled in machinery, it can result in severe injuries such as scalp or limb lacerations, fractures, or even amputations. Therefore, it is important to avoid wearing long hair, loose-fitting clothes, and ties while working around rotating equipment to ensure personal safety.

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  • 8. 

    Skin contact with liquid oxygen can cause frostbite.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Skin contact with liquid oxygen can cause frostbite because liquid oxygen is extremely cold, with a boiling point of -183 degrees Celsius (-297 degrees Fahrenheit). When liquid oxygen comes into contact with skin, it rapidly evaporates and absorbs heat from the surrounding tissue, causing freezing and damage to the skin. This can result in frostbite, which is a condition where the skin and underlying tissues freeze, leading to pain, numbness, and potentially severe tissue damage. Therefore, the statement that skin contact with liquid oxygen can cause frostbite is true.

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  • 9. 

    Acetylene cylinders should never be operated while lying on their side because acetone could be drawn into the valve, regulator and hoses.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Acetylene cylinders should never be operated while lying on their side because when the cylinder is on its side, there is a possibility for acetone, which is used as a solvent and stabilizer in acetylene cylinders, to be drawn into the valve, regulator, and hoses. This can cause damage to the equipment and potentially lead to hazardous situations. Therefore, it is important to always keep acetylene cylinders in an upright position during operation.

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  • 10. 

    Floors, aisles, and passageways must be kept clear of metal, wood, tools, material, oil and grease spots, and other objects:

    • Unless the bell rings and you are in a hurry

    • Because they may cause someone to slip or trip and cause injury

    • Because they are unsightly and make the shop look bad

    • Because they cause more work for the next class or custodians

    Correct Answer
    A. Because they may cause someone to slip or trip and cause injury
    Explanation
    Floors, aisles, and passageways must be kept clear of objects like metal, wood, tools, material, oil and grease spots because they may cause someone to slip or trip and cause injury.

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  • 11. 

    One should       never  touch an electrode to a metal surface other than the workpiece because those surfaces may become electrically live.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Touching an electrode to a metal surface other than the workpiece can cause that surface to become electrically live. This is because the electrode is connected to a power source, and if it comes into contact with another metal surface, it can create a circuit and pass electrical current through that surface. This can be dangerous and potentially cause electric shock or other electrical hazards. Therefore, it is important to only touch the electrode to the workpiece to ensure safe welding practices.

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  • 12. 

    Safety glasses need to be worn:

    • At all times in the shop

    • Only when grinding, chipping, cutting, or shaping metal.

    • Only if someone is working in the shop

    • Only if you don't already wear glasses

    Correct Answer
    A. At all times in the shop
    Explanation
    Safety glasses need to be worn at all times in the shop to ensure protection against any potential hazards. This includes activities such as grinding, chipping, cutting, or shaping metal, but it is not limited to these tasks. Wearing safety glasses is necessary regardless of whether someone is working in the shop or already wears glasses, as it is crucial to prioritize safety and minimize the risk of eye injuries in any situation within the shop.

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  • 13. 

    Oxygen cylinders should never  be stored with flammable gases such as acetylene cylinders.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Oxygen cylinders should never be stored with flammable gases such as acetylene cylinders because oxygen supports combustion and can accelerate the burning process. If a leak or ignition were to occur in the vicinity of the oxygen cylinder, it could lead to a dangerous explosion or fire. Therefore, it is crucial to store oxygen cylinders separately from flammable gases to ensure the safety of the environment and individuals nearby.

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  • 14. 

    When clean-up is called, all scrap metal should be:

    • Swept or dropped onto the floor

    • Left in the booth or on the project you are working on

    • Put in a scrap barrel while wearing gloves

    • Left for the next class to worry about because it will be cool by then

    Correct Answer
    A. Put in a scrap barrel while wearing gloves
    Explanation
    When clean-up is called, all scrap metal should be put in a scrap barrel while wearing gloves. This is the correct answer because it ensures proper disposal of the scrap metal in a designated container. Wearing gloves is important to protect oneself from any sharp edges or potential hazards while handling the scrap metal. Sweeping or dropping the scrap metal onto the floor is not a safe or appropriate method of clean-up. Leaving the scrap metal in the booth or on the project is also not recommended as it can create clutter and potential safety issues. Leaving it for the next class to worry about is not responsible or considerate.

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  • 15. 

    Potential hazards relating to arc welding are

    • Radiation

    • Fumes

    • Toxic gases

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    The potential hazards relating to arc welding include radiation, fumes, and toxic gases. Radiation can be emitted during the welding process, which can be harmful to the eyes and skin if proper protective measures are not taken. Fumes generated during welding can contain various toxic substances, such as metal oxides and gases, which can cause respiratory issues and other health problems. Additionally, certain welding processes can produce toxic gases, such as carbon monoxide and nitrogen dioxide, which can be hazardous if inhaled. Therefore, all of the above options are correct in identifying the potential hazards of arc welding.

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  • 16. 

    A butane or propane cigarette lighter is safe around welding equipment as long as it is kept in one's pocket.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Keeping a butane or propane cigarette lighter in one's pocket around welding equipment is not safe. Lighters that use flammable gases like butane or propane can pose a fire hazard in the presence of sparks or open flames from welding equipment. It is important to keep such lighters away from any potential ignition sources to prevent accidents or fires.

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  • 17. 

    When not in use, an electrode holder, GTAW torch or MIG gun should not be placed in contact with a grounded metal surface.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    When not in use, an electrode holder, GTAW torch, or MIG gun should not be placed in contact with a grounded metal surface because it can cause a short circuit or electrical shock. Grounding is a safety measure to prevent electrical accidents, and placing these tools in contact with a grounded metal surface can bypass this safety measure and create a dangerous situation. Therefore, it is important to ensure that these tools are properly stored and kept away from any grounded metal surfaces when not in use.

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  • 18. 

    Which of the following is the only acceptable method for lighting oxyfuel torches?

    • Matches

    • Cigarette lighter

    • Welding arc

    • Striker

    Correct Answer
    A. Striker
    Explanation
    The only acceptable method for lighting oxyfuel torches is by using a striker. A striker is a tool that produces sparks when struck against a rough surface, such as flint. These sparks are used to ignite the fuel gas and create a flame in the torch. Matches and a cigarette lighter are not suitable for lighting oxyfuel torches as they may not provide a consistent and controlled ignition source. Similarly, a welding arc is not used for lighting oxyfuel torches as it is a completely different process used for welding and cutting metals.

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  • 19. 

    While welding, ventilation should be placed as close to the fume source as practical.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true because placing ventilation as close to the fume source as possible helps to effectively remove and disperse the fumes generated during welding. This reduces the concentration of harmful fumes in the surrounding air, minimizing the risk of inhalation by the welder and others nearby. By positioning the ventilation close to the fume source, it ensures that the fumes are captured and extracted efficiently, creating a safer working environment.

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  • 20. 

    When using a fire extinguisher to extinguish a fire, it should be

    • Pointed at the base of the fire

    • Moved up and down to cool the flames

    • Pointed at the top of the fire

    • Held within six (6) inches of the flames

    Correct Answer
    A. Pointed at the base of the fire
    Explanation
    When using a fire extinguisher to extinguish a fire, it should be pointed at the base of the fire because this is where the fuel source is located. By directing the extinguisher at the base, it helps to cut off the supply of fuel and effectively put out the fire. Pointing at the top of the fire or holding it within six inches of the flames may not be as effective as it does not target the source of the fire. Moving the extinguisher up and down to cool the flames may help in some cases, but it is still important to aim at the base to fully extinguish the fire.

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  • 21. 

    The benefit of copper coated electrode wires is

    • Better arc starts

    • Increased contact tip life

    • Improved wire feeding

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Copper coated electrode wires offer several benefits. Firstly, they provide better arc starts, ensuring a smooth and stable welding process. Secondly, the copper coating helps to increase the lifespan of the contact tip, reducing the need for frequent replacements. Lastly, the copper coating also improves wire feeding, ensuring a consistent and reliable wire feed rate. Therefore, the correct answer is "all of the above".

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  • 22. 

    Fuel gas fittings are equipped with left hand threads.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Fuel gas fittings are equipped with left hand threads because left hand threads are designed to resist loosening caused by the rotation of the fitting during use. This is important for fuel gas fittings as they are subjected to high pressure and vibration, which can cause traditional right hand threads to loosen over time. Left hand threads provide a more secure and reliable connection, ensuring that the fitting remains tight and leak-free.

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  • 23. 

    One should never enter a welding shop without wearing

    • Gloves

    • Safety glasses

    • A welding helmet

    • Welding leathers

    Correct Answer
    A. Safety glasses
    Explanation
    Safety glasses are necessary when entering a welding shop to protect the eyes from sparks, debris, and harmful radiation emitted during the welding process. Welding produces intense light, heat, and sparks that can cause severe eye damage if proper eye protection is not worn. Therefore, safety glasses are an essential safety measure to prevent eye injuries and should always be worn in a welding shop.

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  • 24. 

    One should never  operate arc welding equipment while

    • Standing on wet or damp floors

    • In poorly lighted areas

    • Someone is standing near by

    • In a confined area with proper ventilation

    Correct Answer
    A. Standing on wet or damp floors
    Explanation
    Operating arc welding equipment while standing on wet or damp floors is dangerous because water is a good conductor of electricity. If the floors are wet or damp, there is a higher risk of electrical shock or electrocution. Water can create a path for electricity to flow through the body, resulting in severe injuries or even death. Therefore, it is crucial to ensure a dry and safe working environment when using arc welding equipment.

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  • 25. 

    Safety glasses are not required when welding with the helmet down.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Safety glasses are not required when welding with the helmet down. This statement is false. Safety glasses are an essential safety precaution when welding, even with the helmet down. They provide additional protection for the eyes from sparks, debris, and harmful UV radiation. Welding can create intense light and heat, which can cause eye damage if proper eye protection is not worn. Therefore, safety glasses should always be worn in addition to a welding helmet to ensure maximum safety.

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  • 26. 

    What are the initials of the federal organization created to insure safe and sanitary working conditions for employees?

    • FAA

    • IRS

    • FDA

    • OSHA

    Correct Answer
    A. OSHA
    Explanation
    OSHA stands for Occupational Safety and Health Administration. It is a federal organization that ensures safe and sanitary working conditions for employees. OSHA sets and enforces standards, provides training, outreach, education, and assistance to employers and workers regarding workplace safety and health. It plays a crucial role in preventing workplace injuries, illnesses, and fatalities by promoting and enforcing regulations and guidelines to protect employees.

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  • 27. 

    Vaporized metals, such as zinc, cadmium, lead, chromium and beryllium

    • Are hazardous

    • Can be ignored

    • Are highly flammable

    • May cause slag inclusions

    Correct Answer
    A. Are hazardous
    Explanation
    The given correct answer states that vaporized metals, such as zinc, cadmium, lead, chromium, and beryllium, are hazardous. This means that these metals, when in a vaporized state, pose a potential danger or risk to human health, the environment, or both. It implies that precautions should be taken when working with or around these metals to prevent any negative consequences or harm.

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  • 28. 

    Fuel gas hoses are usually colored

    • Green

    • Red

    • Blue

    • Yellow

    Correct Answer
    A. Red
    Explanation
    Fuel gas hoses are usually colored red because red is commonly recognized as the standard color for identifying fuel-related equipment. This color coding system helps to prevent confusion and ensure safety in various industries where fuel gases are used. Red hoses indicate that they are specifically designed for fuel gas applications, making it easier for workers to identify and handle them correctly.

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  • 29. 

    What should one never  use on gas cylinders, regulators, connections and hoses?

    • Wrenches

    • Teflon tape

    • Leak detectors

    • Oil

    Correct Answer
    A. Oil
    Explanation
    Oil should never be used on gas cylinders, regulators, connections, and hoses because oil is flammable and can increase the risk of fire or explosion. Additionally, oil can degrade the materials used in these components, leading to leaks or other failures. It is important to use appropriate lubricants and sealants that are specifically designed for use with gas systems to ensure safety and proper functioning.

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  • 30. 

    GMAW is the abbreviation for?

    • Gas Machine Arc Welding

    • Gas Method Arc Welding

    • Gas Material Arc Welding

    • Gas Metal Arc Welding

    Correct Answer
    A. Gas Metal Arc Welding
    Explanation
    GMAW stands for Gas Metal Arc Welding. This process involves using a continuous solid wire electrode, which is fed through a welding gun and combined with a shielding gas to create an electric arc. The arc melts the wire and the base metal, creating a weld. This method is commonly used in industries such as automotive, construction, and manufacturing due to its versatility and ability to produce high-quality welds.

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  • 31. 

    Because of the low amount of ultraviolet light present, it is not necessary to use shaded lenses when oxy-fuel cutting.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement suggests that shaded lenses are not necessary when oxy-fuel cutting due to the low amount of ultraviolet light present. However, this is incorrect. Oxy-fuel cutting produces a significant amount of ultraviolet light, which can be harmful to the eyes. Therefore, it is necessary to use shaded lenses for eye protection during oxy-fuel cutting.

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  • 32. 

    Which of the following is considered an advantage of the GMAW process?

    • Higher deposition rates than manual processes

    • Easy to use compared to manual processes

    • Less electrode waste than with SMAW

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    The GMAW process, also known as Gas Metal Arc Welding or MIG welding, offers several advantages. Firstly, it provides higher deposition rates compared to manual processes, meaning that more material can be welded in a shorter amount of time. Secondly, it is easier to use compared to manual processes, making it more accessible for welders of different skill levels. Lastly, GMAW results in less electrode waste than Shielded Metal Arc Welding (SMAW) because it uses a wire electrode that is consumed during the welding process, whereas SMAW uses a coated electrode that is mostly wasted. Therefore, all of the given options are considered advantages of the GMAW process.

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  • 33. 

    Flash burn is

    • Another name for a severe sunburn

    • A burn caused by the welding arc coming in contact with bare skin

    • A burn to the eye caused by exposure to ultraviolet light from the welding arc

    • Damage to equipment and clothing due to the extreme heat of the welding arc

    Correct Answer
    A. A burn to the eye caused by exposure to ultraviolet light from the welding arc
    Explanation
    Flash burn is a burn to the eye caused by exposure to ultraviolet light from the welding arc. When a person's eyes are not properly protected while welding, the intense UV light emitted by the welding arc can damage the surface of the eye, leading to a flash burn. This can cause symptoms such as pain, redness, watering of the eyes, and sensitivity to light. It is important for welders to wear appropriate protective eyewear to prevent flash burns and other eye injuries.

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  • 34. 

    What shade lens should be worn or what shade should you set your auto darkening helmet to when welding:

    • Shade 3

    • Shade 8

    • Shade 5

    • Shade 10

    Correct Answer
    A. Shade 10
    Explanation
    When welding, it is important to protect your eyes from the intense light and radiation produced. Shade 10 is the appropriate lens shade to wear or set your auto darkening helmet to when welding. This shade provides a high level of protection by filtering out a significant amount of the harmful UV and infrared rays emitted during the welding process. It ensures that your eyes are shielded from the bright light, preventing any potential damage or injury.

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  • 35. 

    Which of the following is correct about safety colors:

    • Safe = Green; Danger = Red; Caution = Yellow; Warning = Orange

    • Safe = Yellow; Danger = Orange; Caution = Red; Warning = Green

    • Safe = Green; Danger = Orange; Caution = Green; Warning = Yellow

    • Safe = Green; Danger = Red; Caution = Orange; Warning = Yellow

    Correct Answer
    A. Safe = Green; Danger = Red; Caution = Yellow; Warning = Orange
    Explanation
    The correct answer is Safe = Green; Danger = Red; Caution = Yellow; Warning = Orange. Safety colors are used to convey different levels of risk and caution in various settings. Green is commonly associated with safety and represents a safe or secure condition. Red is universally recognized as a color that signifies danger or a hazardous situation. Yellow is often used to indicate caution or a warning to be careful. Orange is typically used to convey a higher level of warning or danger compared to yellow. Therefore, the given answer accurately represents the commonly accepted meanings of safety colors.

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  • 36. 

    What type of fire extinguisher should be used on electrical fires?

    • Type A

    • Type B

    • TypeC

    • Type D

    Correct Answer
    A. TypeC
    Explanation
    Type C fire extinguishers should be used on electrical fires. This type of extinguisher is specifically designed to extinguish fires involving electrical equipment such as wiring, circuit breakers, and outlets. Type C extinguishers contain non-conductive extinguishing agents, such as dry chemical powder or carbon dioxide, which do not conduct electricity and therefore can safely be used on electrical fires. Using the correct type of fire extinguisher is crucial to effectively and safely extinguish different types of fires.

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  • 37. 

    One should never cut or weld directly against

    • Cast iron

    • Concrete

    • A workbench

    • A non-flammable surface

    Correct Answer
    A. Concrete
    Explanation
    Cutting or welding directly against concrete can be dangerous because it can cause the concrete to crack or explode. Concrete is a brittle material that can shatter under intense heat or pressure. Additionally, concrete contains moisture which can turn into steam when exposed to high temperatures, further increasing the risk of an explosion. Therefore, it is important to avoid cutting or welding directly against concrete to prevent accidents and ensure safety.

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  • 38. 

    A burn that causes the skin to blister is referred to as a

    • First degree burn

    • Second degree burn

    • Third degree burn

    • Fourth degree burn

    Correct Answer
    A. Second degree burn
    Explanation
    A burn that causes the skin to blister is referred to as a second degree burn. This type of burn affects the epidermis and the dermis layers of the skin. It is characterized by redness, pain, swelling, and the formation of blisters. Unlike a first degree burn, which only affects the outermost layer of the skin, a second degree burn penetrates deeper into the skin. It is important to seek medical attention for second degree burns to prevent infection and promote proper healing.

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  • 39. 

    The maximum safe working pressure for Acetylene is

    • 10 psi.

    • 15 psi.

    • 20 psi.

    • 32 psi.

    Correct Answer
    A. 15 psi.
    Explanation
    Acetylene is a highly flammable gas and therefore has a lower maximum safe working pressure compared to other gases. A pressure of 15 psi is considered safe for handling and storage of acetylene. Higher pressures can increase the risk of explosion and fire hazards.

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  • 40. 

    Compressed air may be used to clean sawdust off the ground:

    • Only when you are the only one in the shop

    • If no-one is looking

    • As long as everyone is wearing safety glasses and dressed safely

    • Never

    Correct Answer
    A. Never
    Explanation
    Compressed air should never be used to clean sawdust off the ground. This is because using compressed air can create airborne particles, which can be harmful if inhaled. It is important to use appropriate tools and methods, such as brooms or vacuums, to clean sawdust safely.

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  • 41. 

    What type of thread and color are fuel gases fittings?

    • Right hand - Red

    • Left hand-Red

    • Right hand - Green

    • Left hand - Green

    Correct Answer
    A. Left hand-Red
    Explanation
    Fuel gases fittings are typically color-coded to indicate their type and thread direction. In this case, the correct answer is "Left hand-Red." This means that the fitting has a left-hand thread and is color-coded with the color red. The color red is commonly used to identify fittings that are used for fuel gases.

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  • 42. 

    Of the following, which is not a requirement for the SMAW process?

    • Electricity

    • Gas supply

    • Base metal

    • Filler metal

    Correct Answer
    A. Gas supply
    Explanation
    The SMAW (Shielded Metal Arc Welding) process does not require a gas supply. It uses a flux-coated electrode to create the arc and shield the weld pool from the surrounding atmosphere. The flux coating provides the necessary protection, eliminating the need for an external gas supply like in other welding processes such as TIG or MIG welding.

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  • 43. 

    What is the term for the width of the cut produced by any cutting process?

    • Drag line

    • Kerf

    • Wraparound

    • Slag

    Correct Answer
    A. Kerf
    Explanation
    The term for the width of the cut produced by any cutting process is called "kerf". Kerf refers to the material that is removed during the cutting process, resulting in a gap or width in the cut. This term is commonly used in various cutting processes such as woodworking, metalworking, and laser cutting. The width of the kerf is an important factor to consider in order to achieve accurate and precise cuts.

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  • 44. 

    The oxyfuel process uses oxygen and what other types of gases?

    • Inert Gases

    • Reactive Gases

    • Mixed gases

    • Flammable gases

    Correct Answer
    A. Flammable gases
    Explanation
    The oxyfuel process involves the use of oxygen along with flammable gases. This combination of gases is used in various industrial processes such as cutting, welding, and heating. The oxygen helps in supporting the combustion of the flammable gases, resulting in high temperatures that are necessary for these processes. The use of flammable gases in the oxyfuel process allows for efficient and controlled heating, making it a widely used technique in industries.

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  • 45. 

    Which shielding gas or gas mixture is most often used for welding carbon steel with the short-circuiting transfer mode?

    • 100% Argon

    • 10% Carbon dioxide, 90% Helium

    • 98% Argon, 2% Oxygen

    • 75% Argon, 25% Carbon Dioxide

    Correct Answer
    A. 75% Argon, 25% Carbon Dioxide
    Explanation
    The most commonly used shielding gas or gas mixture for welding carbon steel with the short-circuiting transfer mode is 75% Argon and 25% Carbon Dioxide. This mixture provides good arc stability, improved weld penetration, and reduced spatter. Argon helps to stabilize the arc, while carbon dioxide enhances the weld penetration. The combination of these gases is ideal for achieving high-quality welds on carbon steel using the short-circuiting transfer mode.

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  • 46. 

    The shielding gas most commonly used for welding low carbon steel with GTAW is

    • Carbon Dioxide

    • Argon

    • Helium

    • A mix of Argon and Helium

    Correct Answer
    A. Argon
    Explanation
    Argon is the most commonly used shielding gas for welding low carbon steel with GTAW (Gas Tungsten Arc Welding). Argon is preferred because it provides excellent arc stability, good penetration, and minimal spatter. It also helps to protect the weld from atmospheric contamination and oxidation. Carbon Dioxide, Helium, and a mix of Argon and Helium can also be used as shielding gases for different applications, but Argon is the most commonly used gas for welding low carbon steel.

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  • 47. 

    In GMAW, insufficient gas flow can cause?

    • Undercut

    • Overlap

    • Porosity

    • Hydrogen cracking

    Correct Answer
    A. Porosity
    Explanation
    Insufficient gas flow in GMAW (Gas Metal Arc Welding) can cause porosity. Porosity refers to the presence of small gas pockets or voids in the weld metal, which weakens the weld and reduces its integrity. When there is not enough shielding gas flowing over the weld pool, it fails to protect the molten metal from atmospheric contamination. This leads to the entrapment of gases, such as oxygen and nitrogen, in the weld, resulting in porosity.

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  • 48. 

    Federal regulation requires that hazardous information about a product be provided to all users of that product. The form used to provide this information is called a(n)

    • Information Form (IF)

    • Hazardous Information Sheet (HIS)

    • Occupational Safety and Hazard Form (OSHF)

    • Material Safety Data Sheet (MSDS)

    Correct Answer
    A. Material Safety Data Sheet (MSDS)
    Explanation
    Federal regulation requires that hazardous information about a product be provided to all users of that product. The form used to provide this information is called a Material Safety Data Sheet (MSDS). This document contains detailed information about the potential hazards of a product, including its chemical composition, physical properties, and proper handling procedures. It is important for users to have access to this information in order to safely handle and use hazardous products. The other options, such as Information Form (IF), Hazardous Information Sheet (HIS), and Occupational Safety and Hazard Form (OSHF), do not accurately describe the specific form required by federal regulation.

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  • 49. 

    When using GTAW to weld Aluminum with Alternating Current (AC), the tip of the tungsten electrode should be

    • Tapered

    • Tapered with the end slightly blunted

    • Rounded at the tip

    • Ground at right angles to the grain of the electrode

    Correct Answer
    A. Rounded at the tip
    Explanation
    When using GTAW to weld Aluminum with Alternating Current (AC), the tip of the tungsten electrode should be rounded at the tip. This is because a rounded tip helps to produce a stable and focused arc, which is important for achieving a high-quality weld. The rounded tip also helps to prevent the electrode from sticking to the workpiece and allows for better control of the weld puddle.

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Quiz Review Timeline (Updated): Dec 11, 2023 +

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

  • Current Version
  • Dec 11, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 04, 2018
    Quiz Created by
    Matt Gines

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