Engineeri Safety

 What are Fire Extinguisher Safety Devices?   Fire Extinguisher Safety Devices usually the following safety devices are incorporated in the design of Soda acid extinguisher. F.E. Safety Devices Types of Fire Extinguisher Safety Devices    Here are the type of fire extinguisher safety devices mentioned below - (A) Vent Holes:    These are small holes drill in the side of the head through the screw Threads as the gap is unscrew, these holes communicate with the interior of the container and the design is such that any Residual will guess pressure will discharge through them while the head is still held in position by the threads. They must be kept there of dirty and metal polish and capable of fullfilling their function. (B) Snifter Value:     This is a valve communicating between the air space in the extinguisher and the atmosphere outside the permits the very small quantity of air to escape where the internal pressure ris...

INTRODUCTION OF EXTINGUISHER : Chemical  Extinguisher  are essentially a class of handy portable fire fighting applicances, with a  Limited capacities of fire extinguishing media. They are also called portable Fire extinguisher or first aid, fire fighting applicances for use only on certain type of fire in the incipient stage. Portable is applied to manually operated Fire extinguisher use specially on small fire or in the interim between discovery of fire and function ine of automatic equipment or arrival of professional firefighters. They are generally small and light in weight and can be carried easily from place to place. Large models of certain types known as trolly units and chemical engines are mounted on Simple two wheel chassis,  fitted with a length of hose to extend the available range. The extinguishing agent might be chemicals in the form of very fine solid particles,  liquid or gas, contain are the cylinders. Fire can...

ELECTRICITY STATICS AND HAZARDOUS    As its name indicates it is the electricity of rest. Thus flow of electrons does not take place instate positive and negative charges are developed. These charges go on accumulating if not dissipated.    Static charges are used due to contact and separation of two non-conducting substance. The rate of production of static charges depends on how quick by contact and separation is taking place. The accumulation static charges cause high-voltage, build-up and this charges get dissipated, giving off sparts, is a connector is brought near to I. These sparks capable of igniting the flammable gas/vapour air mixture which may lead to explosion. Remember static charges cannot be prevented from generation but its hazardous can be prevented by not allowing the examination of this charges. The production of static charges are most common in the following industries : ( 1 ) Textile Industry :  Static charges are...

WHAT IS THE HEAT EFFECT OF ELECTRIC CURRENT:    When current passes through a conductor heat is produced. This is in fact the work that is required to be done is sending the current against the resistance, which is converted into heat. Heat produce in the conductor is directly proportional to : • Square of the current passing through conductor 12 • The resistance of the conductor 'R' and  • The time of flow 't' Combining the proportionality, we get, H = 0.24121RT Where, 'H' is heat produced in calories, 'T' is current in ampere resistance on ohm and 't' is the time of flow in second.    The phenomenon is particularly important to Firefighter as so produce if not dissipated safety, will raise the temperature ultimately ignites the combustible materials available in the near. What are Conductor & Insulator?    Conductors are the materials which allow the flow of e.g. through them with least resista...

ELECTRICITY General introduction of Electricity : Electricity is something really cannot be seen but its effect of felt. It may be define as a farm of energy energy can either be destroy not it can be generated it can only be converted from one from of energy to the another electricity is generated by converting other forms of energy that is thermal it energy nuclear energy and energy store in water potential energy similarly electricity can also be converted into other useful forms of energy visit energy mechanical energy light energy extra which find a wonderful application in our day to day life Fundamentals of Electricity : Electricity maybe define as the flow of electrons. The continue slow of electrons true and conductor is known as current and part of it flow is termed as electrical current. The dynamic electricity currencies of two times director and ( dc ) alternate current( ac ). The direct current always flows from positive terminal to negative. E.g. B...

Method of Extension and Prevention: Fire depends upon a reaction between two substance and continuous because of self generated heat. There are four ways of Extinguishing fire i.e., by cooling the fuel below its ignition temperature. By cutting  off the oxygen, by cutting off the supply of fuel or by prohibiting the formation of chain carriers. This is achieved by  -  Taking away the heat faster heat it is generated. Separating the substance apart. Cooling the combustible material and its surrounding to a temperature search that fire die for want to heat. Smoothing the fire by preventing air from reaching eat or by diluting air with some inert gas ( smothering ). Starving the fire by removing combustible material fuel supply. What are the Methods of Fire Extinguishing: COOLING METHOD: Extinction by cooling is achieve, when the rate of heat generated is less than the rate the heat remove, hence the fire die water is...

FIRE AND FIRE TRIANGLE: Definition of Fire: The term fire may be defined as an oxidation process with evolution of heat and light. In other words, fire is a chemical reaction between a fuel and oxygen in the presence of heat. Therefore, it may be started that three things are essential for a fire to take place. Can be represented by the three arms of triangle viz., Heat, combustible substance or fuel and the supporter of combustion or oxygen. A fire cannot take place in the absence of any one of these three factor. In extinguishing a fire, all that is done is to break any one of the arms of the fire triangle does the heat maybe remove and temperature broad below the ignition point or supply of oxygen to the fire maybe stop or by removing the fuel from the scene of Fire. (A) Oxygen: Oxygen is a diatomic gas, having an atomic number of 8 and atomic weight of 16. It is a good supporter of combustion, and can undergo chemical reaction with almost all kinds of...