Electrifying Insights: The Science Of Electricity Quiz

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Electrifying Insights: The Science Of Electricity Quiz - Quiz

Electricity is the presence and flow of electric charge. Electricity is a form of energy that comes in positive and negative forms, that occur naturally or is produced. When it comes to electricity, safety is of importance. Test your knowledge on safety measures about electricity based threats and accidents using the quiz below. Stay safe!


Questions and Answers
  • 1. 

    Electrical devices can retain potentially lethal voltages.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Electrical devices can retain potentially lethal voltages, meaning that even when they are turned off or unplugged, there may still be a dangerous amount of electricity stored within them. This is why it is important to exercise caution and follow proper safety procedures when handling electrical devices to avoid the risk of electric shock or other accidents.

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  • 2. 

    Do not touch equipment or cables that have been exposed to fluids.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    It is important not to touch equipment or cables that have been exposed to fluids because fluids can conduct electricity and pose a risk of electric shock. Additionally, fluids can damage the equipment or cables, leading to malfunction or failure. Therefore, it is necessary to exercise caution and avoid touching any equipment or cables that have come into contact with fluids.

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  • 3. 

    Report all cabling problems to your instructor after class.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement suggests that all cabling problems should be reported to the instructor after class. The correct answer is false because it is not necessary to wait until after class to report cabling problems. It is important to report any issues with cabling immediately to ensure that they can be addressed and resolved in a timely manner. Waiting until after class may result in prolonged downtime or potential safety hazards.

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  • 4. 

    After disconnecting cables from equipment, it is not necessary to fit a protective cap over each end to prevent moisture and dirt from damaging the sockets. 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    It is necessary to fit a protective cap over each end of the disconnected cables to prevent moisture and dirt from damaging the sockets.

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  • 5. 

    It is OK to bend cables tightly to fit equipment.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Bending cables tightly can cause damage to the cables, leading to signal loss or electrical shorts. It is important to ensure that cables are bent with proper care and not excessively, as it can affect their performance and lifespan. Therefore, it is not okay to bend cables tightly to fit equipment.

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  • 6. 

    Inspect all power connections for worn or loose plugs every time you use them.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    It is important to inspect all power connections for worn or loose plugs every time they are used to ensure safety. Worn or loose plugs can lead to electrical hazards such as short circuits or electrical fires. Regularly checking the power connections helps identify any potential issues and allows for timely repairs or replacements, reducing the risk of accidents. Therefore, the statement is true.

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  • 7. 

    Switch off the power before connecting or disconnecting power cables.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    It is important to switch off the power before connecting or disconnecting power cables to ensure safety. This prevents any potential electrical shocks or damage to the devices or appliances being connected or disconnected. By switching off the power, it eliminates the risk of accidental contact with live wires and reduces the chances of short circuits or electrical fires. Therefore, it is crucial to follow this precautionary measure to avoid any potential hazards.

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  • 8. 

    It is OK to touch power source internal parts with bare hands.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    It is not okay to touch power source internal parts with bare hands. Power sources, such as electrical circuits or batteries, can carry high voltage and pose a risk of electric shock. Touching these internal parts without proper insulation or protective gear can result in injury or even death. It is always recommended to use appropriate safety precautions and equipment when dealing with power sources.

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  • 9. 

    To prevent fire, do not place electrical equipment close to combustible materials.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Placing electrical equipment close to combustible materials increases the risk of fire. Combustible materials, such as paper, fabric, or flammable liquids, can easily catch fire if they come into contact with heat generated by electrical equipment. Therefore, it is important to keep a safe distance between electrical equipment and combustible materials to prevent fire hazards.

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  • 10. 

    It’s ok to consider adapting pieces by grinding them to fit the robot without teacher supervision if you’re in a hurry. 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Adapting pieces by grinding them to fit the robot without teacher supervision is not okay, even if you're in a hurry. This suggests that there are potential risks or negative consequences associated with adapting pieces without proper supervision. It is important to follow proper procedures and guidelines to ensure safety and efficiency when working with robots.

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  • 11. 

    Inspect all tools and materials for safe storage every day.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Inspecting all tools and materials for safe storage every day is an important practice to ensure safety in a work environment. By regularly checking the condition and placement of tools and materials, any potential hazards or risks can be identified and addressed promptly. This helps to prevent accidents, injuries, and damage to the tools and materials themselves. Regular inspections also promote organization and efficiency, as it ensures that everything is in its proper place and readily accessible when needed. Thus, the statement "Inspect all tools and materials for safe storage every day" is true.

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  • 12. 

    If a piece of equipment is not working, open it up and see if you can fix it.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement suggests that if a piece of equipment is not working, the solution is to open it up and see if you can fix it. However, this is not always the case. Opening up a piece of equipment without proper knowledge or expertise can lead to further damage or even injury. It is important to consult a professional or follow the manufacturer's instructions for troubleshooting and repair. Therefore, the correct answer is False.

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  • 13. 

    It is OK to handle equipment with wet hands or feet even if the equipment is plugged in.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Handling equipment with wet hands or feet, especially when the equipment is plugged in, can be extremely dangerous. Water is a good conductor of electricity, and wet hands or feet can provide a path for electrical current to flow through the body, resulting in electric shock or electrocution. Therefore, it is not safe to handle equipment with wet hands or feet, and the correct answer is false.

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  • 14. 

    Dispose of used batteries in the garbage.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The correct answer is False because disposing of used batteries in the garbage is not recommended. Batteries contain hazardous materials that can harm the environment if not disposed of properly. It is recommended to recycle used batteries at designated recycling centers or drop-off locations to ensure they are handled and disposed of safely.

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  • 15. 

    The amount of electricity used in solderless breadboards (max voltage 5V) can cause a heart attack?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false. Solderless breadboards are used for prototyping electronic circuits and do not have the capability to generate high voltages that can cause a heart attack. The maximum voltage for solderless breadboards is typically 5V, which is not sufficient to pose any danger to human health.

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  • 16. 

    The purpose of the "third wire" on a three-pronged plug is to "ground" leaking or stray electricity?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The purpose of the "third wire" on a three-pronged plug is not to "ground" leaking or stray electricity. The third wire, also known as the ground wire, is actually designed to provide a path for electrical current to safely flow into the ground in the event of a fault or electrical surge. This helps protect against electric shock and prevents damage to electrical appliances. Therefore, the statement that the purpose of the "third wire" is to "ground" leaking or stray electricity is false.

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  • 17. 

    When you unplug a tool, you should pull the electrical cord?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    When you unplug a tool, you should not pull the electrical cord. Pulling the cord can damage the cord itself, the plug, or the outlet. It is recommended to grasp the plug firmly and pull it straight out of the outlet to safely unplug a tool.

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  • 18. 

    You should never leave a running machine unattended, however, you can leave powered breadboard unattended because there is no moving parts there?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Leaving a powered breadboard unattended is not recommended because even though it may not have moving parts, it can still pose a fire hazard or cause electrical issues if left unattended. It is always important to monitor any powered equipment to ensure safety and prevent any potential accidents or damage.

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  • 19. 

    Which of the following problems can faulty electrical equipment cause?

    • A.

      Shock.

    • B.

      Fire

    • C.

      Explosion

    • D.

      All of the above

    Correct Answer
    D. All of the above
    Explanation
    Faulty electrical equipment can cause various problems, including shock, fire, and explosion. When electrical equipment is faulty, it can lead to electrical shocks if a person comes into contact with exposed wires or faulty components. It can also cause fires due to short circuits, overheating, or sparks igniting flammable materials. Additionally, faulty electrical equipment can result in explosions if there is a buildup of gases or if electrical arcing occurs in hazardous environments. Therefore, all of the mentioned problems can be caused by faulty electrical equipment.

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  • 20. 

    Which statement is TRUE about low voltage circuits (5 - 9 V) 

    • A.

      At low voltages (5-9V), the major risk is the risk of burns from high current short circuits

    • B.

      Electrical circuits with low voltages (5-9V) cannot cause short circuits, because the voltage is too low

    • C.

      Even low voltages (5-9V) circuit can supply 20 amps of current ,that is why there is a major risk for human to get heart attack or shock

    • D.

      All of the above

    Correct Answer
    A. At low voltages (5-9V), the major risk is the risk of burns from high current short circuits
    Explanation
    At low voltages (5-9V), the major risk is the risk of burns from high current short circuits. This is because even though the voltage is low, high current can still flow through the circuit, leading to overheating and potentially causing burns. It is important to handle low voltage circuits with caution and ensure that proper safety measures are in place to prevent short circuits and the associated risks.

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  • 21. 

    The ratings for four typical domestic appliance fuses are given below. Which is the safest fuse to use for an appliance with a normal operating current of 2A

    • A.

      13A

    • B.

      3A

    • C.

      8A

    • D.

      5A

    Correct Answer
    B. 3A
    Explanation
    The safest fuse to use for an appliance with a normal operating current of 2A would be a 3A fuse. This is because the fuse rating should be slightly higher than the normal operating current to allow for any temporary surges in current that may occur. Using a fuse with a rating that is too high, such as 5A or 8A, could result in the fuse not blowing when it should and potentially causing damage to the appliance or creating a safety hazard.

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  • 22. 

    Which of the following statements is NOT correct? 

    • A.

      Electricity always travels to ground

    • B.

      Electricity tries to travel to ground

    • C.

      Electricity takes the path of lease resistance

    • D.

      Electricity travels in a complete circuit

    Correct Answer
    A. Electricity always travels to ground
    Explanation
    The statement "Electricity always travels to ground" is not correct. While it is true that electricity tends to follow the path of least resistance, it does not always travel to ground. Electricity can flow through conductors and circuits without necessarily going to the ground.

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  • 23. 

    A current even as low as ______ can be felt by the body

    • A.

      1 Amp

    • B.

      6 Volts

    • C.

      1 mAmp

    • D.

      6 Ohms

    Correct Answer
    C. 1 mAmp
    Explanation
    A current even as low as 1 mAmp can be felt by the body because the human body is sensitive to electrical currents. Even small currents can cause muscle contractions and nerve stimulation, leading to a tingling or painful sensation. The threshold for feeling electrical currents varies among individuals, but generally, currents above 1 mAmp are noticeable and can be uncomfortable.

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  • 24. 

    Which part of the human body offers the most resistance to electricity

    • A.

      Fingers

    • B.

      Toes

    • C.

      Wet skin

    • D.

      Thick and/or dry skin

    Correct Answer
    D. Thick and/or dry skin
    Explanation
    Thick and/or dry skin offers the most resistance to electricity because it acts as an insulator, preventing the flow of electric current through the body. Fingers, toes, and wet skin are more conductive and offer less resistance to electricity.

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  • 25. 

    The greater the body's resistance to electricity, the ____ amount of harm to the person

    • A.

      Less

    • B.

      Greater

    • C.

      Resistance has no effect on electricity

    • D.

      Equal

    Correct Answer
    A. Less
    Explanation
    The greater the body's resistance to electricity, the less amount of harm to the person. This is because resistance limits the flow of electric current through the body. When resistance is high, it reduces the amount of current that can pass through the body, thereby reducing the potential harm or damage caused by electricity.

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  • 26. 

    Which of the following are electrical hazards

    • A.

      Flammable materials near electrical equipment and/or static electricity

    • B.

      Damaged insulation on wires, broken plugs, and overheated appliances

    • C.

      Overloaded circuits

    • D.

      All of the above are electrical hazards

    Correct Answer
    D. All of the above are electrical hazards
    Explanation
    The given answer is correct because all of the mentioned options are indeed electrical hazards. Flammable materials near electrical equipment and static electricity can cause fires and explosions. Damaged insulation on wires, broken plugs, and overheated appliances can lead to electrical shocks and fires. Overloaded circuits can cause overheating and potential fire hazards. Therefore, all of these scenarios pose risks and can be considered electrical hazards.

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  • 27. 

    If you are uncertain about something in the lab, it is okay to ask a friend who has completed all the requirements to use that specific tool.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    It is important to ask for help or clarification when uncertain about something in the lab. Asking a friend who has completed all the requirements to use a specific tool can provide valuable guidance and ensure safety. Collaborating with others can enhance learning and prevent mistakes or accidents. Therefore, it is acceptable to seek assistance from a knowledgeable friend in such situations.

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  • 28. 

    All injuries must be reported to the teacher immediately

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    All injuries must be reported to the teacher immediately in order to ensure prompt medical attention and appropriate action. Reporting injuries immediately allows the teacher to assess the severity of the injury and provide necessary first aid or medical assistance. It also helps in documenting the incident and taking appropriate measures to prevent similar accidents in the future. By reporting injuries to the teacher immediately, students can ensure their own safety and the safety of others in the school environment.

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  • 29. 

    Lab equipment needs to be cleaned only at the end of the period each day

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Lab equipment needs to be cleaned not only at the end of the period each day, but also before and after each use. This is important to maintain hygiene and prevent cross-contamination between different experiments or samples. Regular cleaning ensures that the equipment is in proper working condition and ready for the next use. Failure to clean the equipment regularly can lead to inaccurate results, contamination, and potential hazards.

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  • 30. 

    It is okay to bring a drink into the lab as long as none of the equipment is running

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Bringing a drink into the lab, even when none of the equipment is running, is not okay. Lab environments require strict safety measures to prevent accidents and contamination. Liquids can spill, causing damage to equipment or creating hazards. Additionally, certain chemicals or substances in the lab may react with the drink, leading to dangerous reactions. Therefore, it is important to avoid bringing any food or drinks into the lab, regardless of whether the equipment is running or not.

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  • 31. 

    Carrying a tool in your pocket is okay as long as you don’t remove it from the class

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Carrying a tool in your pocket is not okay, even if you don't remove it from the class. The statement implies that it is acceptable to have a tool in your pocket as long as you don't take it out, but this is incorrect. Carrying a tool in your pocket can still pose a safety risk and may be against the rules or policies of the class or institution. It is important to follow guidelines and ensure that tools are stored properly to prevent accidents or disruptions.

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  • 32. 

    It is okay to talk to a person while they are using a piece of equipment, as long as you do not distract them

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    It is not okay to talk to a person while they are using a piece of equipment, even if you do not distract them. Engaging in conversation can still divert their attention, leading to potential accidents or mistakes. It is important to prioritize safety and minimize distractions when someone is operating equipment.

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  • 33. 

     It is okay to use a ‘flat’ screwdriver to undo a ‘cross’ screw

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    It is not okay to use a 'flat' screwdriver to undo a 'cross' screw. A 'cross' screw requires a 'cross' or 'Phillips' screwdriver with a specific shape that matches the screw head. Using a 'flat' screwdriver on a 'cross' screw can lead to slipping and damaging the screw head, making it difficult to undo or causing potential harm.

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  • 34. 

    The first aid kit can be should only be stored in the school main office, so no one steals the contents

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement suggests that the first aid kit should only be stored in the school main office to prevent theft. However, this is not a valid reason for storing the first aid kit in a specific location. The primary concern should be accessibility and availability of the kit during emergencies, rather than the fear of theft. It is important to have multiple first aid kits placed in easily accessible areas throughout the school to ensure prompt response and assistance in case of accidents or injuries.

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  • 35. 

    A class “D” fire extinguisher is a must in a computer engineering shop

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    A class "D" fire extinguisher is not a must in a computer engineering shop. Class "D" fire extinguishers are specifically designed to extinguish fires caused by combustible metals, such as magnesium, titanium, and sodium. These types of fires are rare in a computer engineering shop, where the primary fire hazards are electrical fires and fires caused by flammable liquids. Therefore, a class "D" fire extinguisher is not necessary in this context.

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  • 36. 

    Once you’ve received your equipment passport you may use the equipment any time without permission

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is false because even after receiving an equipment passport, it does not mean that you can use the equipment anytime without permission. The equipment passport is simply a document that provides information about the equipment and its authorized users. However, permission may still be required from the appropriate authorities or supervisors before using the equipment to ensure safety, compliance, and proper usage protocols.

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  • 37. 

    Minor injuries need not be reported

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Minor injuries should be reported to ensure that proper documentation is maintained and appropriate actions can be taken if necessary. Even though they may not be as severe as major injuries, reporting minor injuries helps in identifying patterns, implementing preventive measures, and ensuring the safety of employees. Therefore, the statement "Minor injuries need not be reported" is false.

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  • 38. 

     If a machine does not work, report it to the instructor

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    If a machine does not work, it is important to report it to the instructor. This is because the instructor needs to be aware of any malfunctioning equipment so that they can either fix it themselves or arrange for someone else to do so. Reporting the issue ensures that the machine can be repaired or replaced in a timely manner, minimizing any disruption to the workflow or learning process. Additionally, reporting the problem helps to maintain a safe working environment and prevents any potential accidents or injuries that may arise from using faulty equipment.

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  • 39. 

    At all times, if you are in doubt of how to use equipment, ask someone who is licensed (student passport), or check the manual or ask the teacher.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The given statement suggests that if someone is unsure about how to use equipment, they should seek guidance from someone who is licensed or refer to the manual or ask the teacher. This emphasizes the importance of safety and proper usage of equipment. Therefore, the correct answer is true.

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  • 40. 

    All guards must be in place and properly working before using the equipment

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement suggests that it is necessary for all guards to be in place and functioning correctly before utilizing any equipment. This emphasizes the importance of safety measures and precautions to prevent accidents or injuries while operating the equipment. By ensuring that all guards are present and functioning properly, the risk of potential hazards can be minimized, making the statement true.

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  • 41. 

    As long as no one is using the equipment after you, leave it running until you need it again.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The correct answer is False because leaving equipment running when it is not being used can lead to unnecessary energy consumption and increase the risk of accidents or malfunctions. It is more efficient and safer to turn off equipment when it is not in use to conserve energy and prevent any potential hazards.

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  • 42. 

    Safety equipment like PPE are necessary only when using a tool that uses power.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Safety equipment like PPE (Personal Protective Equipment) is necessary when using a tool that uses power because power tools have the potential to cause more severe injuries compared to hand tools. Power tools often generate high speeds, vibrations, and sparks, which can increase the risk of accidents. PPE, such as gloves, goggles, ear protection, and helmets, helps to minimize the chances of injuries by providing a physical barrier and safeguarding the user against potential hazards. Therefore, it is important to wear safety equipment when operating power tools to ensure personal safety.

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  • 43. 

    A safety zone is an area where shop rules do not apply

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement "A safety zone is an area where shop rules do not apply" is false. A safety zone is actually an area where specific rules and regulations are implemented to ensure the safety and well-being of individuals. These rules may include wearing protective gear, following specific procedures, and maintaining a certain level of caution.

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  • 44. 

    Long hair must be tied back before using any power tool.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Long hair can pose a safety hazard when using power tools as it can get caught in the tool's moving parts, leading to serious injuries. Therefore, it is essential to tie back long hair before operating any power tool to prevent accidents and ensure personal safety.

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  • 45. 

    Before working in a computer engineering shop you should know where the emergency exits are.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Knowing the location of emergency exits is important in any workplace, including a computer engineering shop. In case of any emergency situations such as fire, it is crucial to be aware of the nearest exits to ensure a safe and efficient evacuation. This knowledge helps to minimize potential risks and ensure the well-being of all employees in the event of an emergency. Therefore, it is essential for anyone working in a computer engineering shop to know the location of emergency exits.

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  • 46. 

    Any adjustments to a machine must be made with the power off

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Adjustments to a machine should always be made with the power off to ensure safety. Working on a machine while it is powered on can pose a risk of electrical shock or injury. By turning off the power before making any adjustments, the chances of accidents or damage to the machine are significantly reduced. It is a standard safety practice to follow when working with machinery.

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  • 47. 

    Hand tools in __________condition are responsible for many injuries

    Correct Answer
    poor
    bad
    broken
    Explanation
    Hand tools in poor, bad, or broken condition are responsible for many injuries. When hand tools are in poor condition, they may be worn out, rusty, or damaged, making them less effective and more likely to cause accidents. Similarly, hand tools in bad condition may have faulty parts or defects that can lead to accidents. Broken hand tools are especially dangerous as they can easily cause cuts, punctures, or other injuries. Therefore, it is crucial to regularly inspect and maintain hand tools to ensure they are in good working condition and minimize the risk of accidents.

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  • 48. 

    After use, __________and return the tool to its proper place

    Correct Answer
    clean
    check
    Explanation
    After use, it is important to clean the tool to remove any dirt or debris that may have accumulated. This helps to maintain the tool's performance and prevent any damage or malfunction. Additionally, checking the tool ensures that it is in proper working condition and ready for the next use. Regular cleaning and checking of tools not only prolong their lifespan but also promote safety in their usage.

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  • 49. 

    Use the __________tool for the job

    Correct Answer
    right
    proper
    correct
    Explanation
    The given question asks for the tool that should be used for the job. The words "right," "proper," and "correct" all imply that there is a specific tool that is suitable and appropriate for the job. Therefore, any of these options can be chosen as the correct answer because they all convey the same meaning.

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  • 50. 

    Never __________behind a person using a piece of equipment

    Correct Answer
    stand
    Explanation
    When using a piece of equipment, it is important to never stand behind a person using it. Standing behind someone can be dangerous as there is a risk of getting hit or injured by the equipment or the person using it. It is recommended to maintain a safe distance and stand in a position where you have a clear view of the equipment and the person operating it to ensure safety.

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Quiz Review Timeline +

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

  • Current Version
  • Nov 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 15, 2015
    Quiz Created by
    Ratkajm
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