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Heating service exam Michigan Questions
and Answers (Expert Solutions)
Q: On a low pressure residential steam boiler the release device opens at?
ANS 🗹🗹: 15 pounds
Q: If too much primary air is used the flame will
ANS 🗹🗹: Lift off the burner
Q: What operates the heat anticipator in a low voltage thermostat
ANS 🗹🗹: 24 volts a/c
Q: A limit control is located where in the electrical circuit
ANS 🗹🗹: Either the 24 or 120 V circuit
Q: What is the usual oil pressure at the nozzle in a high pressure gun type oil burner
ANS 🗹🗹: 100 PSIG
Q: What license is required to perform a CSD-1 on a boiler that has an input rating of
1.7 MBTU
ANS 🗹🗹: Mechanical contractor category 6
Q: A psychrometer meter is what ?
ANS 🗹🗹: A Hygrometer consisting of a wet-bulb and dry-bulb Thermometer, The
difference in the two readings used to determine the atmospheric humidity
Q: A psychrometric chart is a
ANS 🗹🗹: Chart where the various property of air is plotted
Q: Combustion is what type of process
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ANS 🗹🗹: chemical
Q: What percentage of oxygen is in the air
ANS 🗹🗹: 21%
Q: A hand shut off valve in a gas line is used to turn gas on and off to
ANS 🗹🗹: A burner and pilot
Q: CGV is the abbreviation for
ANS 🗹🗹: Combustion gas valve
Q: The maximum safety drop out time for a thermocouple is
ANS 🗹🗹: Three minutes
Q: The bimetallic Strip of metal in a thermostat is made of copper and ?
ANS 🗹🗹: Invar
Q: What is the light sensitive material used in a cad cell
ANS 🗹🗹: Cadmium sulphide
Q: What is the resistance measured in a cad cell in the absence of light
ANS 🗹🗹: 100,000
Q: When operating a fuel oil furnace with a one pipe system what needs to take place at
the fuel pump ?
ANS 🗹🗹: Bypass plug should not be installed
Q: A gas drip leg must ?
ANS 🗹🗹: Not be smaller in diameter than the pipe which it connects
Q: All boilers shall have the portable water protected with
Heating service exam Michigan Questions
and Answers (Expert Solutions)
Q: On a low pressure residential steam boiler the release device opens at?
ANS 🗹🗹: 15 pounds
Q: If too much primary air is used the flame will
ANS 🗹🗹: Lift off the burner
Q: What operates the heat anticipator in a low voltage thermostat
ANS 🗹🗹: 24 volts a/c
Q: A limit control is located where in the electrical circuit
ANS 🗹🗹: Either the 24 or 120 V circuit
Q: What is the usual oil pressure at the nozzle in a high pressure gun type oil burner
ANS 🗹🗹: 100 PSIG
Q: What license is required to perform a CSD-1 on a boiler that has an input rating of
1.7 MBTU
ANS 🗹🗹: Mechanical contractor category 6
Q: A psychrometer meter is what ?
ANS 🗹🗹: A Hygrometer consisting of a wet-bulb and dry-bulb Thermometer, The
difference in the two readings used to determine the atmospheric humidity
Q: A psychrometric chart is a
ANS 🗹🗹: Chart where the various property of air is plotted
Q: Combustion is what type of process
, Page | 2
ANS 🗹🗹: chemical
Q: What percentage of oxygen is in the air
ANS 🗹🗹: 21%
Q: A hand shut off valve in a gas line is used to turn gas on and off to
ANS 🗹🗹: A burner and pilot
Q: CGV is the abbreviation for
ANS 🗹🗹: Combustion gas valve
Q: The maximum safety drop out time for a thermocouple is
ANS 🗹🗹: Three minutes
Q: The bimetallic Strip of metal in a thermostat is made of copper and ?
ANS 🗹🗹: Invar
Q: What is the light sensitive material used in a cad cell
ANS 🗹🗹: Cadmium sulphide
Q: What is the resistance measured in a cad cell in the absence of light
ANS 🗹🗹: 100,000
Q: When operating a fuel oil furnace with a one pipe system what needs to take place at
the fuel pump ?
ANS 🗹🗹: Bypass plug should not be installed
Q: A gas drip leg must ?
ANS 🗹🗹: Not be smaller in diameter than the pipe which it connects
Q: All boilers shall have the portable water protected with
