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oxidising substances it includes oxidising substances and the organic peroxides oxidising substances are by themselves not combustible but by
flammable solids flammable solids are substances which are flammable or liable to spontaneous combustion or emit flammable gases on contact with
flammable liquids previously the word flammable has the same meaning as inflammable flammable liquids are those liquids or mixtures of liquids or
gases critical temperature is the a substance which has a critical temperature below 50degc has a vapour temperature above which pressure of more
explosives these include the commercial explosives preparations and substances used as blasting agents ammunition fireworks etc some examples are
hazard identification each united nations hazard class with the exception of class 9 has a distinctive diamond shaped label bearing a pictogram for
classification of hazardous chemicals the classification of chemical hazards as recommended by the un committee of experts on the transport of
storage and handling of chemical substances are two important duties of a laboratory worker both of these require appropriate safety measures to
chemical hazards chemicals are present in all laboratories it is good to consider all chemicals toxic and flammable unless one has definite
microwaves the microwave region of the electromagnetic spectrum is increasingly used for a variety of purposes for example for rapid heating the
precautions the following must always be observed while dealing with lasers1 never look along a laser beam or expose any part of your skin to it
lasers laser light is an extremely intense form of electromagentic radiation and its name is acronym for light amplification by stimulated emission
precautions the following precautions should be taken while using uv lamps1 tjv lamps must always be properly shielded2wear approved goggles when
ultraviolet radiations the ultraviolet uv light has higher energy than visible light hydrogen lamps deuterium lamps and other sources of
nonionising radiations as stated earlier the radiation hazards are not limited to ionising radiations from radioactive materials there are a number
radiation hazards we are sure that you would have studied about electromagnetic radiation during your studies at the school you would recall that
introduction you read about the fire hazards general precautions and remedial measures in case of an outbreak of fire in the previous unit in
let us recall briefly what all we have learnt about fire hazards in this unit fire accident can happen due to a number of reasons like flammable
fire blankets we have already discussed the use of fire blankets but it is worth noting that fire blankets are now made of glass fibre instead
fire buckets all labs should be equipped with a fire bucket the buckets are not used only for carrying water to a fire this is one of their uses the
water extinguishers direct the jet at the base of the flame and keep it moving across the fireattack a fire which is spreading vertically at its
use the following procedure for fire fighting1 always take a position between the fire and the exit so your escape route cannot be cut off fire
use of fire extinguishers we know that one type of fire extinguisher cannot serve the purpose on all kinds of fire in this subsection you will study
extinguishing a fire the techniques and equipment which you will learn about in this section relate to the standard kinds of fire fighting equipment
fire barriers when a fire starts in a building it spreads quickly bya radiation - intense heat radiates to neighbouring surfaces which are rapidly