During warm-up of a cold hot water boiler excessive pressure build-up is prevented by
a) a very slow warm-up
b) an expansion tank
c) a pressure relief valve
d) opening the boiler outlet valve
e) venting the system
Answer: B
During warm-up of a cold hot water boiler excessive pressure build-up is prevented by
a) a very slow warm-up
b) an expansion tank
c) a pressure relief valve
d) opening the boiler outlet valve
e) venting the system
Answer: B