The greatest fears in hot water coil installations handling subfreezing air are:
i) pipe expansivity
ii) outside air temperature being too low
iii) failure of the circulating pipe
iv) water viscosity being too high
v) failure of the heat source
a) i, ii, and iv
b) i, ii, and iii
c) iii only
d) i, iv, and v
e) iii and v
Answer: E