Generally using the correct fire extinguisher is your best bet
You can put metal in the refrigerator but not in the microwave where it could cause a fire.
I would put out fire safely in a science lab by spreading Carbon di oxide gas on the fire
If your hands are on fire, you can safely extinguish the fire by immediately stopping, dropping to the ground, and rolling to smother the flames. This technique deprives the fire of oxygen and helps put it out quickly.
The large majority of fires can be put out safely with water. The exceptions are electrical, grease, or some super heated metals.
Flour should not be used to extinguish a grease fire as it can cause the fire to spread. Instead, a fire extinguisher or baking soda should be used to safely put out a grease fire.
To safely extinguish an orange flame on a propane stove, turn off the gas supply to the stove and carefully cover the flame with a metal lid or a fire extinguisher. Do not use water to put out a propane fire as it can spread the flames.
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To safely extinguish a grease fire caused by flour, do not use water as it can make the fire worse. Instead, carefully cover the fire with a metal lid or baking sheet to smother it. Turn off the heat source and leave the lid in place until the fire is completely out. Never use flour or other powders to try to put out a grease fire as they can make it spread.
No, putting flour on a fire is not safe as it can cause the fire to spread or even explode. It is important to use a fire extinguisher or call emergency services in case of a fire.
switch off the main switch and use sand to put off the fire
"My son liked to play with a fire-fighter's helmet" and "It was the fire-fighters' opinion that the fire could be put out" (several of them) and "it was the fire-fighter's opinion that the fire could be put out" (just one with an opinion).
To safely extinguish an alcohol flame, you can smother it by covering it with a non-flammable material like a metal lid or a fire blanket. Do not use water to put out an alcohol flame as it can spread the fire.