hvacr gas heating esco Exam
Study Guide: GRADED A+.
Practice Questions and Verified
Answers. Latest 2026 Update
using an ohmmeter, there is 120 VAC between high speed and ground wires,
this indicates - Ans✔✔-open
if temperature rise is too high... - Ans✔✔-increase fan speed
how many of the 3 OSHA conditions defining confined spaces must be met -
Ans✔✔-all 3
what causes the temperature limit safety switch to shut off the burner -
Ans✔✔-fan motor failure
flashback indicates - Ans✔✔-the gas is flowing slower than the speed at which
burn is occurring
what type of connector is used to control noise in ductwork - Ans✔✔-vibration
eliminators
, if the main burner lights and after a minute the blower fan comes on but the
burner flames waver in one corner... - Ans✔✔-there is faulty blower housing
a burner orifice... - Ans✔✔-meters gas to the burner
when lockout/tagout is used - Ans✔✔-there should be 1 key kept by the
electrician
the gas pressure is usually - Ans✔✔-3.5
a spark igniter operates at - Ans✔✔-7,500 vac
a good thermocouple produces - Ans✔✔-30 millivolts
what must be present for combustion - Ans✔✔-air, fuel and ignition source
the innerds of a type b vent is made of - Ans✔✔-aluminium
the outsides of a type b vent is made of - Ans✔✔-galvanized steel
one cubic foot of liquified petroleum produces,,, - Ans✔✔-2000- 2500 btu
the highest concentration of fuel that ignites is the - Ans✔✔-UEL
Study Guide: GRADED A+.
Practice Questions and Verified
Answers. Latest 2026 Update
using an ohmmeter, there is 120 VAC between high speed and ground wires,
this indicates - Ans✔✔-open
if temperature rise is too high... - Ans✔✔-increase fan speed
how many of the 3 OSHA conditions defining confined spaces must be met -
Ans✔✔-all 3
what causes the temperature limit safety switch to shut off the burner -
Ans✔✔-fan motor failure
flashback indicates - Ans✔✔-the gas is flowing slower than the speed at which
burn is occurring
what type of connector is used to control noise in ductwork - Ans✔✔-vibration
eliminators
, if the main burner lights and after a minute the blower fan comes on but the
burner flames waver in one corner... - Ans✔✔-there is faulty blower housing
a burner orifice... - Ans✔✔-meters gas to the burner
when lockout/tagout is used - Ans✔✔-there should be 1 key kept by the
electrician
the gas pressure is usually - Ans✔✔-3.5
a spark igniter operates at - Ans✔✔-7,500 vac
a good thermocouple produces - Ans✔✔-30 millivolts
what must be present for combustion - Ans✔✔-air, fuel and ignition source
the innerds of a type b vent is made of - Ans✔✔-aluminium
the outsides of a type b vent is made of - Ans✔✔-galvanized steel
one cubic foot of liquified petroleum produces,,, - Ans✔✔-2000- 2500 btu
the highest concentration of fuel that ignites is the - Ans✔✔-UEL
