What is the most diverse class of chordates?
What is the most diverse class of chordates?
Subphylum Vertebrata – “Backboned.” This is the largest and most diverse subphylum of chordates whose evolution has been guided by the basic adaptations of the living endoskeleton, efficient respiration, advanced nervous system, and paired limbs.
What are the 5 major classes in the phylum Chordata?
The phylum chordata (animals with backbones) is divided into five common classes: fish, amphibians, reptiles, mammals and birds.
What are the 6 classes of fire?
Classes of fire
- Class A – fires involving solid materials such as wood, paper or textiles.
- Class B – fires involving flammable liquids such as petrol, diesel or oils.
- Class C – fires involving gases.
- Class D – fires involving metals.
- Class E – fires involving live electrical apparatus. (
What is a Class K fire?
A Class K fire extinguisher is used on fires involving cooking media (fats, grease, and oils) in commercial cooking sites such as restaurants. Saponification takes place when alkaline mixtures, such as potassium acetate, potassium citrate, or potassium carbonate, are applied to burning cooking oil or fat.
What are the 5 classes of fire?
Fire is divided into five classes (A, B, C, D, and K) that are primarily based on the fuel that is burning. This classification system helps to assess hazards and determine the most effective type of extinguishing agent.
What is a Class F fire?
Class F fires are fuelled by cooking fats or oils e.g. in a kitchen setting. The appropriate extinguisher used to tackle a class F fire is a ‘wet chemical’ extinguisher.
What type of fire extinguisher is suitable for a Class F fire?
wet chemical extinguisher
Which extinguisher is a class A B & C type?
Overview: Standard dry powder fire extinguishers are also called ‘ABC’ extinguishers because they tackle class A, B and C fires, however, they are not recommended for use in enclosed spaces. This is because the powder can be easily inhaled, and also the residue is very difficult to clean up after.
What are Class C fire extinguishers used for?
Class C. Class C fires involve energized electrical equipment. Extinguishers with a C rating are designed for use with fires involving energized electrical equipment.
What is the difference between ABC and CO2 fire extinguisher?
ABC Powder is a multi-purpose extinguisher medium suitable for all classes of fire, however although effective, a Powder Extinguisher will leave a residue that can damage sensitive electrical equipment. If this is a concern it may be wise to use a CO2 Extinguisher.
What type of fire extinguisher is best for home use?
ABC extinguishers
What is extinguishment method?
The theory of fire extinguishment is based on removing any one or more of the four elements in the fire tetrahedron to suppress the fire. REMOVING THE HEAT. In order to remove the heat, something must be applied to the fire to absorb the heat or act as a heat exchanger.
How can a fire be extinguished Class 8?
Fire can be extinguished in 3 ways:
- By removing the fuel.
- By removing the heat.
- By cutting off the air supply to the burning substance.
Which type of fire extinguisher is most commonly used?
Dry Chemical Fire Extinguishers
Which Inhalent is most used in fire extinguisher?
Carbon dioxide (CO2) fire extinguishers are used for Class B and C fires. They emit pressurized CO2 gas, which smothers the fire by blocking the oxygen that the fire needs. Unlike the dry chemical types, this nonflammable gas quickly evaporates leaving nothing behind.
What are the 5 portable fire extinguishers?
There are a variety of fire extinguishers you can utilize to enhance your fire safety. The five most commonly used fire extinguishers are water, foam, powder, carbon dioxide and wet chemical.
Which gas is used in fire extinguisher?
carbon dioxide
What gas is FM 200?
What is the chemical name for FM-200™ gas? The chemical name for FM-200™ is 1,1,1,2,3,3,3-Heptafluoropropane. It is also referred to as hydrofluorocarbon (HFC) 227ea and is manufactured by Chemours under the trademark FM-200™.
Is CO2 used in fire extinguishers?
CO2 fire extinguishers contain pure carbon dioxide which is a clean extinguishant, leaving no residue. Suitable for class B flammable liquid fires (petrol, oil, solvents), and recommended for use on live electrical equipment.
Which chemical is used in fire extinguishers How is it harmful Class 10?
The dry chemical is potassium bicarbonate or sodium bicarbonate. They are harmful if inhaled.