4. Material. Flashcards
0
Q
- What is tallow?
A
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.
1
Q
- What is nidle valve?
A
It permits excess air to be released from the expansion tank prior to heat-up of the system.
2
Q
- What is Potassium Hydroxide?
A
A brittle white deliquescent solid KOH that dissolves with much heat in less than its weight of water to form a strong alkaline and caustic solution, also called Caustic Potash.
