The second from last step in an automatic boiler programmed shutdown sequence is
a) timer shutdown
b) main flame trial
c) post purge
d) operating control switch contacts closing
e) flame failure switch contacts opening
Answer: C
The second from last step in an automatic boiler programmed shutdown sequence is
a) timer shutdown
b) main flame trial
c) post purge
d) operating control switch contacts closing
e) flame failure switch contacts opening
Answer: C