Which of the following is generally used as circulating fluid in freezing climates?
A. Liquid carbon dioxide
B. Water
C. A mixture of propylene glycol and water
D. Liquid nitrogen
Answer:C
Which of the following is generally used as circulating fluid in freezing climates?
A. Liquid carbon dioxide B. Water C. A mixture of propylene glycol and water D. Liquid nitrogen
Explanation: In freezing climates, antifreeze solution like a mixture of water with propylene glycol or ethylene glycol or glycerol is used as coolants. Liquid carbon dioxide, water and liquid nitrogen are not used as coolants in freezing climates.