Heating service exam Michigan questions with correct answers

Heating service exam Michigan questions
with correct answers
On |a |low |pressure |residential |steam |boiler |the |release |device |opens |at? |- |VERIFIED |ANSWER✔✔-15 |
pounds



If |too |much |primary |air |is |used |the |flame |will |- |VERIFIED |ANSWER✔✔-Lift |off |the |burner



What |operates |the |heat |anticipator |in |a |low |voltage |thermostat |- |VERIFIED |ANSWER✔✔-24 |volts |a/c



A |limit |control |is |located |where |in |the |electrical |circuit |- |VERIFIED |ANSWER✔✔-Either |the |24 |or |120 |V
|circuit




What |is |the |usual |oil |pressure |at |the |nozzle |in |a |high |pressure |gun |type |oil |burner |- |VERIFIED |
ANSWER✔✔-100 |PSIG



What |license |is |required |to |perform |a |CSD-1 |on |a |boiler |that |has |an |input |rating |of |1.7 |MBTU |- |
VERIFIED |ANSWER✔✔-Mechanical |contractor |category |6



A |psychrometer |meter |is |what |? |- |VERIFIED |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 |- |VERIFIED |ANSWER✔✔-Chart |where |the |various |property |of |air |is |plotted



Combustion |is |what |type |of |process |- |VERIFIED |ANSWER✔✔-chemical



What |percentage |of |oxygen |is |in |the |air |- |VERIFIED |ANSWER✔✔-21%



A |hand |shut |off |valve |in |a |gas |line |is |used |to |turn |gas |on |and |off |to |- |VERIFIED |ANSWER✔✔-A |burner
|and |pilot

, CGV |is |the |abbreviation |for |- |VERIFIED |ANSWER✔✔-Combustion |gas |valve



The |maximum |safety |drop |out |time |for |a |thermocouple |is |- |VERIFIED |ANSWER✔✔-Three |minutes



The |bimetallic |Strip |of |metal |in |a |thermostat |is |made |of |copper |and |? |- |VERIFIED |ANSWER✔✔-Invar



What |is |the |light |sensitive |material |used |in |a |cad |cell |- |VERIFIED |ANSWER✔✔-Cadmium |sulphide



What |is |the |resistance |measured |in |a |cad |cell |in |the |absence |of |light |- |VERIFIED |ANSWER✔✔-100,000



When |operating |a |fuel |oil |furnace |with |a |one |pipe |system |what |needs |to |take |place |at |the |fuel |pump
|? |- |VERIFIED |ANSWER✔✔-Bypass |plug |should |not |be |installed




A |gas |drip |leg |must |? |- |VERIFIED |ANSWER✔✔-Not |be |smaller |in |diameter |than |the |pipe |which |it |
connects



All |boilers |shall |have |the |portable |water |protected |with |- |VERIFIED |ANSWER✔✔-A |backflow |preventer



Compared |to |national |gas |with |the |same |BTU |rating, |the |orifice |opening |in |an |LP |gas |fire |furnace |is |?
|- |VERIFIED |ANSWER✔✔-Smaller




A |thermostat |that |cycles |too |often |or |not |enough |indicates |- |VERIFIED |ANSWER✔✔-Improper |heat |
anticipator |setting



The |pressure |regulator |on |a |LP |gas |system |is |set |at |- |VERIFIED |ANSWER✔✔-11.0 |w.c



A |fast |acting |type |of |gas |valve |is |the |_________ |valve |? |- |VERIFIED |ANSWER✔✔-Solenoid