A main disadvantage of an electric boiler is
a) they are not very compact
b) furnace refractory tends to be high maintenance item
c) vibration requires special footings
d) input energy cost is high
e) energy transfer efficiency is low
Answer: D
A main disadvantage of an electric boiler is
a) they are not very compact
b) furnace refractory tends to be high maintenance item
c) vibration requires special footings
d) input energy cost is high
e) energy transfer efficiency is low