When there is the possibility of freezing temperatures, what type of liquid is used in a runaround type heat recovery system?
a) steam
b) water
c) mineral oil
d) ethylene glycol
e) silicone thermal fluid
Answer: D
When there is the possibility of freezing temperatures, what type of liquid is used in a runaround type heat recovery system?
a) steam
b) water
c) mineral oil
d) ethylene glycol
e) silicone thermal fluid
Answer: D