2026 -2027 Actual Complete Real Exam Questions
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If you measure a 10% Co2 in the breech and a 12% over the fire,
there must be
an air leak in the
boiler.
A)T
B)F - ANSWER -A)T
Should a smoke test be done "before" or after using an
electronic analyzer? -
ANSWER -Before (so that you don't draw a lot of carbon
into the sensitive
electronic
parts)
Must heating appliances have their own
branch circuit?
A)Yes
B)No - ANSWER –
Yes
, If a thermostat has an anticipator, what should its
setting match?
A)Burner
current
B)Control
current
C)Ignitor current - ANSWER -B)Control
(thermostat) current
An E.C.M motor is just like a PSC has a start switch -
ANSWER -Variable
Speed
What does post purge (motor off delay)
help with?
A)Clean
startup
B)Clean
shutdown
C)Forming good air pattern - ANSWER -B)Clean
Shutdown
A reverse acting aquastat
A)Turns boiler off on temp increase
B)Turns boiler on with temp increase
C)Turns circulator off on water temp drop - ANSWER -Turns
circulator off when boiler gets too cool
What problems are created by a dirty furnace air filter?