@PROFDOCDIGITALLIBRARIES
Heating service exam Michigan with
correct answers 2025
On a low pressure residential steam boiler the release device opens at? -
ANSWER-15 pounds
If too much primary air is used the flame will - ANSWER-Lift off the burner
What operates the heat anticipator in a low voltage thermostat - ANSWER-24
volts a/c
PR
A limit control is located where in the electrical circuit - ANSWER-Either the 24
or 120 V circuit
O
FD
What is the usual oil pressure at the nozzle in a high pressure gun type oil
burner - ANSWER-100 PSIG
What license is required to perform a CSD-1 on a boiler that has an input rating
O
of 1.7 MBTU - ANSWER-Mechanical contractor category 6
C
A psychrometer meter is what ? - ANSWER-A Hygrometer consisting of a wet-
bulb and dry-bulb Thermometer, The difference in the two readings used to
determine the atmospheric humidity
A psychrometric chart is a - ANSWER-Chart where the various property of air is
plotted
Combustion is what type of process - ANSWER-chemical
, @PROFDOCDIGITALLIBRARIES
What percentage of oxygen is in the air - ANSWER-21%
A hand shut off valve in a gas line is used to turn gas on and off to - ANSWER-A
burner and pilot
CGV is the abbreviation for - ANSWER-Combustion gas valve
The maximum safety drop out time for a thermocouple is - ANSWER-Three
minutes
PR
The bimetallic Strip of metal in a thermostat is made of copper and ? -
ANSWER-Invar
O
What is the light sensitive material used in a cad cell - ANSWER-Cadmium
sulphide
FD
What is the resistance measured in a cad cell in the absence of light - ANSWER-
100,000
O
When operating a fuel oil furnace with a one pipe system what needs to take
C
place at the fuel pump ? - ANSWER-Bypass plug should not be installed
A gas drip leg must ? - ANSWER-Not be smaller in diameter than the pipe which
it connects
All boilers shall have the portable water protected with - ANSWER-A backflow
preventer
Heating service exam Michigan with
correct answers 2025
On a low pressure residential steam boiler the release device opens at? -
ANSWER-15 pounds
If too much primary air is used the flame will - ANSWER-Lift off the burner
What operates the heat anticipator in a low voltage thermostat - ANSWER-24
volts a/c
PR
A limit control is located where in the electrical circuit - ANSWER-Either the 24
or 120 V circuit
O
FD
What is the usual oil pressure at the nozzle in a high pressure gun type oil
burner - ANSWER-100 PSIG
What license is required to perform a CSD-1 on a boiler that has an input rating
O
of 1.7 MBTU - ANSWER-Mechanical contractor category 6
C
A psychrometer meter is what ? - ANSWER-A Hygrometer consisting of a wet-
bulb and dry-bulb Thermometer, The difference in the two readings used to
determine the atmospheric humidity
A psychrometric chart is a - ANSWER-Chart where the various property of air is
plotted
Combustion is what type of process - ANSWER-chemical
, @PROFDOCDIGITALLIBRARIES
What percentage of oxygen is in the air - ANSWER-21%
A hand shut off valve in a gas line is used to turn gas on and off to - ANSWER-A
burner and pilot
CGV is the abbreviation for - ANSWER-Combustion gas valve
The maximum safety drop out time for a thermocouple is - ANSWER-Three
minutes
PR
The bimetallic Strip of metal in a thermostat is made of copper and ? -
ANSWER-Invar
O
What is the light sensitive material used in a cad cell - ANSWER-Cadmium
sulphide
FD
What is the resistance measured in a cad cell in the absence of light - ANSWER-
100,000
O
When operating a fuel oil furnace with a one pipe system what needs to take
C
place at the fuel pump ? - ANSWER-Bypass plug should not be installed
A gas drip leg must ? - ANSWER-Not be smaller in diameter than the pipe which
it connects
All boilers shall have the portable water protected with - ANSWER-A backflow
preventer
