On a packaged boiler a number of electrical switches connected in series can be categorized as
a) controls
b) interlocks
c) start-up devices
d) programmer controls
e) detectors
Answer: B
On a packaged boiler a number of electrical switches connected in series can be categorized as
a) controls
b) interlocks
c) start-up devices
d) programmer controls
e) detectors
Answer: B