Most heater fuel controls are ____________ to prevent pilot burner fuel supply if hot oil flow is below a preset limit.
a) locked
b) interlocked
c) unlocked
d) jammed
e) by-passed
Answer: B
Most heater fuel controls are ____________ to prevent pilot burner fuel supply if hot oil flow is below a preset limit.
a) locked
b) interlocked
c) unlocked
d) jammed
e) by-passed
Answer: B