what is encystment ? and What are class A ,B,C,D,E fires ? please answer fast I have online exam in 1/2 hour .
Answers
Explanation:
Noun. (plural encystments) The formation of a cyst. The process of becoming enclosed by a cyst.
Classes of Fires
There are four classes of fires:
Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics.
Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.
Class C: Electrical equipment, appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury from electrical shock. Don’t use water.
Class D: Certain flammable metallic substances such as sodium and potassium. These materials are normally not found in the Medical Center.
Answer:
Encystment, the formation of the cyst, also helps the microbe to disperse easily, from one host to another or to a more favorable environment. When the encysted microbe reaches an environment favorable to its growth and survival, the cyst wall breaks down by a process known as excystation.
Explanation:
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. (Technically ‘Class E’ doesn’t exists however this is used for convenience here)
Class F - fires involving cooking oils such as in deep-fat fryers.