What is called the kindling temperature of a fuel class 7?

Answer: The 'flash point' of a fuel is a certain temperature at which any fuel begins to burn. It is also called the 'kindling temperature of the fuel'.

What is called the kindling temperature of a fuel?

The autoignition temperature or kindling point of a substance is the lowest temperature in which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. This temperature is required to supply the activation energy needed for combustion.

What do you understand by flashpoint of a fuel?

flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. The flash point is a general indication of the flammability or combustibility of a liquid.

What is the flash point how is it otherwise called Class 7?

The particular temperature at which a fuel begins to burn is called its flash point. It is also known as its kindling temperature.

What do you understand by the flashpoint of fuel Brainly in?

Every fuel has a particular temperature at which it begins to burn. This temperature is called the 'flashpoint' or 'kindling temperature' of the fuel. If the temperature of a fire can be brought down below the flash point, the fuel stops burning, hence extinguishing the fire.

Ignition Temperature | Combustion and Flame | Class 8 Chemistry

What do you understand by flash?

Verb. flash, gleam, glint, sparkle, glitter, glisten, glimmer, shimmer mean to send forth light. flash implies a sudden outburst of bright light. lightning flashed gleam suggests a steady light seen through an obscuring medium or against a dark background.

In what sense is it a bad master class 7?

(ii) It is a “bad master” because if it is not kept under control, it can prove very dangerous. Each year thousands of homes and shops are damaged by fire. Vast areas of forest are also destroyed and hundreds of people are killed or injured.

Who is a fireman Class 7?

Bands of fire fighting workers with special equipment, known as fire brigades, are there to put out fires. Firefighters are highly trained people. They possess many skills. They cut off electricity supply, knock down dangerous walls, spray water and other materials to bring fire under control.

What is meant by fuels Class 7?

The material which are burned to produce heat energy are called Fuels. In simple words- Substance which can burn in air is called combustible substance. Example. Coal, LPG, Kerosene, Diesel, Petrol are fuels.

Who was Mr Wonka?

Mr Willy Wonka was a strange man. He used to make all strange inventions. He had a subordinate called Charlie. There was Oompa- Loompa volunteers on whom he used to carry out the testing of his inventions.

What's the meaning of kindling temperature?

Kindling Temperature: “The autoignition temperature or kindling point of a substance is the lowest temperature in which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark.” -

What is fire point and flash point?

The flash point of a liquid hydrocarbon is the temperature to which it must be heated to emit sufficient flammable vapor to flash when brought into contact with a flame. The fire point of a hydrocarbon liquid is the higher temperature at which the oil vapors will continue to burn when ignited.

What is kindling temperature class 8?

Ignition temperature: It is the minimum temperature to which a combustible substance must be heated, before it catches fire. Therefore, we see that a combustible substance cannot catch fire as long as its temperature is lower than its ignition temperature e.g. Ignition temperature of phosphorus is 35 °C.

What is the igneous temperature of fuel?

"The ignition temperature of a fuel is 80°C".

What do you mean by calorific value Class 8?

Calorific value is defined as the amount of heat energy released during complete combustion of a unit mass of a fuel. It is expressed in kJ/kg.

What is fuel by BYJU's?

In other words, any substance which upon combustion produces a usable amount of energy is known as fuel. Example: fossil fuels, biogas, nuclear energy, etc.

What is calorific value of fuel?

The heat value of a fuel is the amount of heat released during its combustion. Also referred to as energy or calorific value, heat value is a measure of a fuel's energy density, and is expressed in energy (joules) per specified amount (e.g. kilograms). Heat value. Hydrogen (H₂) 120-142 MJ/kg.

What is called fuel?

A fuel is any material that can be made to react with other substances so that it releases energy as thermal energy or to be used for work.

How is fire a friend?

But unconsciously, we know that fire can serve as a friend and a foe for us, as have been written above, fire will serve as our friend if we will used it on proper ways.

Why is the fire called a friend?

Fire is indeed a friend but, as we know, it can be a dangerous enemy once it gets out of control. The discovery of fire and its various uses had helped early man to cope with nature better. Moreover, it was due to fire that we were able to adopt a settled mode of life.

How did GOLU help the python?

Golu had helped the python to coil around the branch of a tree. The python felt grateful to him and quietly followed him. The python helped Golu when the crocodile caught him by the nose.

Is fire a friend or an enemy?

Fire is indeed a friend but, as we know, it can be a dangerous enemy once it gets out of control.

What is the meaning of fire friend and foe?

Cope (v) सामना करना Ex. The discovery of fire and its uses helped early man to cope with nature better . Enemy – foe शत्रु Get out of control Ex. Fire is indeed a friend but as we know , it can be a dangerous enemy once it gets out of control.

Who is the poet of chivvy?

In his poem 'Chivvy', Michael Rosen illustrates many examples of 'do' and 'don'ts'. Through this poem the poet expresses the dilemma of the children when they are continuously instructed by the grown-ups about what to do and not to do.

What is multimedia flash?

Flash, also known as Adobe Flash is a multimedia graphic software that is used to create animations. The animations are made for so many purposes, for example, movies, games, desktop presentations, web applications, etc.