hvacr gas heating esco exam questions with correct answers.

hvacr
gas
/




heating
/




esco exam questions with correct answers
/ / / / / /




using
/an


/ohmmeter,


/there


/is


/120 /VAC /between /high /speed /and /ground /wires, /this /indicates /- /correct /answer(s) /✔✔ /open




if /temperature /rise /is /too /high... /- /correct /answer(s) /✔✔ /increase /fan /speed



how
/many


/of


/the /3 /OSHA /conditions /defining /confined /spaces /must /be /met /- /correct /answer(s) /✔✔ /all /3




what
/causes


/the /temperature /limit /safety /switch /to /shut /off /the /burner /- /correct /answer(s) /✔✔ /fan /motor


/failure




flashback
/indicates /-


/correct /answer(s) /✔✔ /the /gas /is /flowing /slower /than /the /speed /at /which /burn /is /occurring

, what
/type


/of


/connector /is /used /to /control /noise /in /ductwork /- /correct /answer(s) /✔✔ /vibration /eliminators




if
/the


/main


/burner


/lights


/and


/after /


a
/minute


/the


/blower


/fan


/comes


/on


/but


/the


/burner /flames /waver /in /one /corner... /- /correct /answer(s) /✔✔ /there /is /faulty /blower /housing




a /burner /orifice... /- /correct /answer(s) /✔✔ /meters /gas /to /the /burner



when
/lockout/tagout /is /used /- /correct /answer(s) /✔✔ /there /should /be /1 /key /kept /by /the /electrician




the /gas /pressure /is /usually /- /correct /answer(s) /✔✔ /3.5



a /spark /igniter /operates /at /- /correct /answer(s) /✔✔ /7,500 /vac