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What two safety precautions must you take when using antifreeze liquid?
Dont use to much Anti freeze - (make sure ratio of water to Anti freeze are in balance) use gloves when using anti freeze Dont drink it :) Hope this helps
What precautions must be taken when using the chemicals and the optional equipment?
the operator must be protected from the splashing of the chemicals
What are the disadvantages of a liquid cooled engine?
Heavier, more parts to make and maintain, liquid coolant can be corrosive to metals and can leak/ dry up. Must use antifreeze during cold weather.
What are the safety precautions when using a sander?
you must where safety glasses and keep your body limbs away from the device
What precautions must be taken when using the high power lens microscope?
Don't break the cover or the glass.
What precautions must be taken when using nail polish remover.?
Avoid being on the skin because it hashes the skin.
Why doesn't antifreeze freeze?
Actually, antifreeze will freeze. It just freezes at a much lower temperature than ordinary water. But it can freeze, and the chemical structure of antifreeze is such that the molecules will not change state (liquid to solid -- freeze) except at the very lowest temperatures. A lot of thermal energy must be removed from antifreeze to cause the molecules to "hook up" and the stuff to change state into a solid. It's based on the nature of the chemical structure of antifreeze.
What precautions should you take when you are using high power lenses?
You must be very careful that you don't crush the cover slip and the slide.
What colligative property is responsible for antifreeze?
The colligative property responsible for antifreeze is freezing point depression. Adding antifreeze (such as ethylene glycol) to water lowers the freezing point of the solution, preventing the liquid from freezing at lower temperatures.
How many quarts of pure antifreeze must be added to 4 quarts of a 20 antifreeze solution to obtain a 40 antifreeze and solution?
You need 1 1/3 quarts of pure antifreeze.
How many gallons of a 50 percent antifreeze solution must be mixed with 70 gallons of 30 percent antifreeze to get a mixture that is 40 percent antifreeze?
70gallons
How many gallons of a 90 percent antifreeze solution must be mixed with 80 gallons of 25 percent antifreeze to get a mixture that is 80 percent antifreeze?
614
