hvacr gas heating esco exam questions and answers

hvacr gas heating esco exam questions and answers 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