A small chain is often seen hanging at the back of a petrol carrying lorry. State and explain its significance.
Understand the Problem
The question is asking about the significance of a small chain that is often seen hanging at the back of a petrol carrying lorry. It implies a request for both a statement of its use as well as an explanation of why it is important, particularly in relation to safety or preventing static electricity buildup.
Answer
The chain is for grounding to prevent static buildup and sparking.
The small chain hanging at the back of a petrol carrying lorry serves as an earthing chain to neutralize any static electricity that may build up due to friction. This prevents the risk of sparks, which could ignite the petrol.
Answer for screen readers
The small chain hanging at the back of a petrol carrying lorry serves as an earthing chain to neutralize any static electricity that may build up due to friction. This prevents the risk of sparks, which could ignite the petrol.
More Information
The metal chain provides a grounding path for static electricity to dissipate safely into the earth. This is particularly important for vehicles carrying flammable materials, as static discharge could create a spark and cause a fire or explosion.
Tips
A common mistake is thinking that all vehicles need this; modern trucks may have conductive tires serving the same purpose.
Sources
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