Electrifying Insights: The Science Of Electricity Quiz
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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. TrueExplanation
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.Rate this question:
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- 2.
Do not touch equipment or cables that have been exposed to fluids.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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- 3.
Report all cabling problems to your instructor after class.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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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. FalseExplanation
It is necessary to fit a protective cap over each end of the disconnected cables to prevent moisture and dirt from damaging the sockets.Rate this question:
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- 5.
It is OK to bend cables tightly to fit equipment.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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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. TrueExplanation
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.Rate this question:
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- 7.
Switch off the power before connecting or disconnecting power cables.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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- 8.
It is OK to touch power source internal parts with bare hands.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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- 9.
To prevent fire, do not place electrical equipment close to combustible materials.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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- 11.
Inspect all tools and materials for safe storage every day.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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- 14.
Dispose of used batteries in the garbage.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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- 17.
When you unplug a tool, you should pull the electrical cord?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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 aboveExplanation
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.Rate this question:
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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 circuitsExplanation
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.Rate this question:
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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. 3AExplanation
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.Rate this question:
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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 groundExplanation
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.Rate this question:
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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 mAmpExplanation
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.Rate this question:
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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 skinExplanation
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.Rate this question:
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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. LessExplanation
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.Rate this question:
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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 hazardsExplanation
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.Rate this question:
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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. TrueExplanation
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.Rate this question:
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- 28.
All injuries must be reported to the teacher immediately
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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- 37.
Minor injuries need not be reported
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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- 38.
If a machine does not work, report it to the instructor
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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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. TrueExplanation
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.Rate this question:
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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. TrueExplanation
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.Rate this question:
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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. FalseExplanation
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.Rate this question:
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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. TrueExplanation
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.Rate this question:
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- 43.
A safety zone is an area where shop rules do not apply
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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.Rate this question:
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- 44.
Long hair must be tied back before using any power tool.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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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. TrueExplanation
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.Rate this question:
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- 46.
Any adjustments to a machine must be made with the power off
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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- 47.
Hand tools in __________condition are responsible for many injuries
Correct Answer
poor
bad
brokenExplanation
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.Rate this question:
- 48.
After use, __________and return the tool to its proper place
Correct Answer
clean
checkExplanation
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.Rate this question:
- 49.
Use the __________tool for the job
Correct Answer
right
proper
correctExplanation
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.Rate this question:
- 50.
Never __________behind a person using a piece of equipment
Correct Answer
standExplanation
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.Rate this question:
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Current Version
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Nov 21, 2023Quiz Edited by
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Sep 15, 2015Quiz Created by
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