Flashcards in 4. Material. Deck (3):
1. What is nidle valve?
It permits excess air to be released from the expansion tank prior to heat-up of the system.
5. What is tallow?
animal fat, the rendered fat of cattle and sheep; white and almost tasteless when pure.
Harder than grease, composed of glycerides of fatty acids, containing a large proportion of palmitic acid and steric acid. It is used to make candles, soap and glycerol margarine.