Basic Information Of Electrical Safety Quiz

1. It is safe to work close to an overhead power line if:

You do not touch the line for more than 30 seconds

You use a wooden ladder

The power is switched off

It is not raining

Working close to an overhead power line is safe only if the power is switched off. This ensures that there is no electricity flowing through the line, eliminating the risk of electric shock or electrocution. Even if other precautions like not touching the line for more than 30 seconds, using a wooden ladder, or it not raining may reduce the risk to some extent, they do not guarantee safety. The only foolproof way to ensure safety is by switching off the power.

Explanation

Working close to an overhead power line is safe only if the power is switched off. This ensures that there is no electricity flowing through the line, eliminating the risk of electric shock or electrocution. Even if other precautions like not touching the line for more than 30 seconds, using a wooden ladder, or it not raining may reduce the risk to some extent, they do not guarantee safety. The only foolproof way to ensure safety is by switching off the power.

2. When do you need to check electrical hand tools for damage?

Before you use it

Every day

Once a week

At least once a year

Before using electrical hand tools, it is important to check them for any damage. This is crucial for ensuring safety and preventing any accidents or injuries. By inspecting the tools before each use, you can identify any potential issues such as frayed cords, loose connections, or broken parts. This allows you to address the problems promptly and avoid using faulty equipment that could pose a risk. Regularly checking for damage before each use is a good practice to maintain the safety and efficiency of electrical hand tools.

Explanation

Before using electrical hand tools, it is important to check them for any damage. This is crucial for ensuring safety and preventing any accidents or injuries. By inspecting the tools before each use, you can identify any potential issues such as frayed cords, loose connections, or broken parts. This allows you to address the problems promptly and avoid using faulty equipment that could pose a risk. Regularly checking for damage before each use is a good practice to maintain the safety and efficiency of electrical hand tools.

3. You are using a 230 volt item of equipment when the fuse blows. What is the first thing you should do?

Fit another fuse of the same size

Fit a bigger fuse

Use a paper clip to link the contacts

Check for obvious damage

The first thing you should do when the fuse blows while using a 230 volt item of equipment is to check for obvious damage. This is important because a blown fuse could be a result of a fault or damage in the equipment. By checking for obvious damage, you can identify any visible issues such as frayed wires, burnt components, or loose connections that may have caused the fuse to blow. This step is crucial for ensuring the safety of the equipment and preventing further damage or potential hazards.

Explanation

The first thing you should do when the fuse blows while using a 230 volt item of equipment is to check for obvious damage. This is important because a blown fuse could be a result of a fault or damage in the equipment. By checking for obvious damage, you can identify any visible issues such as frayed wires, burnt components, or loose connections that may have caused the fuse to blow. This step is crucial for ensuring the safety of the equipment and preventing further damage or potential hazards.

4. You should use an Residual Current Device with 230 volt tools because:

It lowers the voltage

It quickly cuts off the power if there is a fault

It makes the tool run at a safe speed

It saves energy and lowers costs

Using a Residual Current Device (RCD) with 230 volt tools is important because it quickly cuts off the power if there is a fault. This is crucial for safety reasons as it helps to prevent electric shocks or other accidents that may occur due to faulty equipment. By detecting any imbalance in the electrical current, the RCD can immediately interrupt the power supply, minimizing the risk of injury or damage. Therefore, using an RCD provides an added layer of protection and ensures a safer working environment.

Explanation

Using a Residual Current Device (RCD) with 230 volt tools is important because it quickly cuts off the power if there is a fault. This is crucial for safety reasons as it helps to prevent electric shocks or other accidents that may occur due to faulty equipment. By detecting any imbalance in the electrical current, the RCD can immediately interrupt the power supply, minimizing the risk of injury or damage. Therefore, using an RCD provides an added layer of protection and ensures a safer working environment.

5. On building sites, the recommended safe voltage for electrical equipment is:

12 volts

24 volts

110 volts

230 volts

The recommended safe voltage for electrical equipment on building sites is 110 volts. This voltage is typically used to power tools and equipment in construction sites as it provides enough power for most tasks while reducing the risk of electrical shock. Higher voltages, such as 230 volts, can pose a greater danger to workers if proper safety measures are not in place. Therefore, the recommended safe voltage for electrical equipment on building sites is 110 volts.

Explanation

The recommended safe voltage for electrical equipment on building sites is 110 volts. This voltage is typically used to power tools and equipment in construction sites as it provides enough power for most tasks while reducing the risk of electrical shock. Higher voltages, such as 230 volts, can pose a greater danger to workers if proper safety measures are not in place. Therefore, the recommended safe voltage for electrical equipment on building sites is 110 volts.

6. Why do building sites use a 110 volt electricity supply instead of the usual 230 volt domestic supply?

It is less likely to kill you

It is cheaper

It moves faster along the cables

It is safer for the environment

Building sites use a 110 volt electricity supply instead of the usual 230 volt domestic supply because it is less likely to kill you. A lower voltage is considered safer as it reduces the risk of electric shock and electrocution. This is especially important in construction sites where workers are exposed to various electrical hazards. By using a lower voltage, the severity of potential accidents is minimized, ensuring the safety of the workers.

Explanation

Building sites use a 110 volt electricity supply instead of the usual 230 volt domestic supply because it is less likely to kill you. A lower voltage is considered safer as it reduces the risk of electric shock and electrocution. This is especially important in construction sites where workers are exposed to various electrical hazards. By using a lower voltage, the severity of potential accidents is minimized, ensuring the safety of the workers.

7. The PAT test label on a power tool tells you:

When the next safety check is due

When the tool was made

Who tested the tool before it left the factory

Its earth-loop impedance

The PAT test label on a power tool tells you when the next safety check is due. This label provides important information about the maintenance and inspection schedule of the power tool. It serves as a reminder for the user to conduct regular safety checks on the tool to ensure its safe operation. By indicating when the next safety check is due, the label helps in promoting a safe working environment and preventing potential accidents or hazards.

Explanation

The PAT test label on a power tool tells you when the next safety check is due. This label provides important information about the maintenance and inspection schedule of the power tool. It serves as a reminder for the user to conduct regular safety checks on the tool to ensure its safe operation. By indicating when the next safety check is due, the label helps in promoting a safe working environment and preventing potential accidents or hazards.

8. If you need to use a power tool in a waterlogged part of the site, it is safest to:

Wear Wellington boots

Use an air-powered tool if possible

Only use 230 volt equipment

Wrap a plastic bag around the tool

Using an air-powered tool if possible is the safest option when needing to use a power tool in a waterlogged part of the site. This is because air-powered tools are designed to operate without the need for electricity, reducing the risk of electric shock in wet conditions. Wellington boots may provide some protection against water, but they do not eliminate the risk of electrical hazards. Only using 230 volt equipment or wrapping a plastic bag around the tool do not address the main concern of using a power tool in a waterlogged area.

Explanation

Using an air-powered tool if possible is the safest option when needing to use a power tool in a waterlogged part of the site. This is because air-powered tools are designed to operate without the need for electricity, reducing the risk of electric shock in wet conditions. Wellington boots may provide some protection against water, but they do not eliminate the risk of electrical hazards. Only using 230 volt equipment or wrapping a plastic bag around the tool do not address the main concern of using a power tool in a waterlogged area.

9. The colour of a 110 volt power cable and connector should be:

Black

Red

Blue

Yellow

The color of a 110 volt power cable and connector should be yellow. This is because yellow is the standard color coding for 110 volt electrical systems. Different voltages have different color codes to ensure safety and to prevent confusion. Yellow is specifically used for 110 volt systems to easily distinguish them from other voltage levels.

Explanation

The color of a 110 volt power cable and connector should be yellow. This is because yellow is the standard color coding for 110 volt electrical systems. Different voltages have different color codes to ensure safety and to prevent confusion. Yellow is specifically used for 110 volt systems to easily distinguish them from other voltage levels.

10. What is the best way to protect an extension cable while you work?

Run the cable by the shortest route

Cover the cable with yellow tape

Cover the cable with pieces of wood

Run the cable above head height

Running the cable above head height is the best way to protect an extension cable while working. By doing so, the cable is less likely to be tripped over or damaged by equipment or tools on the ground. This also helps to prevent the cable from being exposed to moisture or other hazards that may be present at ground level. Additionally, running the cable above head height reduces the risk of accidental contact with the cable, minimizing the chances of electric shock or injury.

Explanation

Running the cable above head height is the best way to protect an extension cable while working. By doing so, the cable is less likely to be tripped over or damaged by equipment or tools on the ground. This also helps to prevent the cable from being exposed to moisture or other hazards that may be present at ground level. Additionally, running the cable above head height reduces the risk of accidental contact with the cable, minimizing the chances of electric shock or injury.