A low hot oil flow shutdown (FSDL) ____________ installed in the outlet line of an oil heater.
a) is almost always
b) is always
c) is sometimes
d) is never
e) cannot be
Answer: B
A low hot oil flow shutdown (FSDL) ____________ installed in the outlet line of an oil heater.
a) is almost always
b) is always
c) is sometimes
d) is never
e) cannot be
Answer: B