Can smoke exist without fire?

Yes ,Smoke occurs when there is incomplete combustion (not enough oxygen to burn the fuel completely). In complete combustion, everything is burned, producing just water and carbon dioxide. When incomplete combustion occurs, not everything is burned.

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Correspondingly, what does grey smoke mean?

White smoke can often mean material is off-gassing moisture and water vapor, meaning the fire is just starting to consume material. Grey smoke can indicate that the fire is slowing down and running out of materials to burn. What does pink smoke mean? A group of women who say they are priests launched pink smoke from a balcony overlooking the square on Wednesday to demand female ordination. Their protest is a play on the smoke signals sent from the Sistine Chapel to indicate whether the cardinals assembled therein have agreed on a new pope.

What does purple smoke represent?

In every instance smoke grenades have been used in my experience, if the color is relevant, meaning is assigned to it for a specific, time limited purpose. For example, orders for an operation may dictate that purple smoke indicates the forwardmost location of friendly forces, so friendly fire support must be deli... Keeping this in consideration, what is white smoke? White smoke usually means coolant is getting into the combustion chambers of your vehicle. This generally happens because of a cracked or leaking head gasket, which allows coolant to seep into your cylinders. In extreme cases, you will need to replace your head gasket.

What does yellow smoke mean?

Yellow smoke at a structure fire most likely indicates incomplete combustion. This is usually a very dangerous condition because it can lead to a back draft. Thereof, is colored smoke toxic? Used in day-time fireworks, smoke bombs, military smoke signals, fashion shows and advertising light effects, for instance, colored smoke can release toxic by-products into the environment, according to the researchers.