Moreover, you can see some signs, which mean you need to adopt or avoid a particular
behavior because behaving contrary to what is indicated in the sign can be dangerous. For example there is a sign of "No Smoking" so if you find such sign then you should avoid smoking because it is possible that specific area contains highly flammable substances, so smoking in such areas is very risky. Similarly there is another sign, which says the workers should use safety spectacles to protect their eyes against flying sparks.