hvacr gas heating esco Exam questions & answers |
100% verified solutions |questions with correct answers
2025 latest update!!
Terms in this set (76) Questions Verified Answers
1) using an ohmmeter, there is 120 VAC between high open
speed and ground wires, this indicates
2) if temperature rise is too high... increase fan speed
3) how many of the 3 OSHA conditions defining confined all 3
spaces must be met
4) what causes the temperature limit safety switch to shut fan motor failure
off the burner
5) flashback indicates the gas is flowing
slower than the speed
at which burn is
occurring
6) what type of connector is used to control noise in vibration eliminators
ductwork
7) if the main burner lights and after a minute the blower there is faulty blower
, fan comes on but the burner flames waver in one housing
corner...
8) a burner orifice... meters gas to the
burner
9) when lockout/tagout is used there should be 1 key
kept by the electrician
10) the gas pressure is usually 3.5
11) a spark igniter operates at 7,500 vac
12) a good thermocouple produces 30 millivolts
13) what must be present for combustion air, fuel and ignition
source
14) the innerds of a type b vent is made of aluminium
15) the outsides of a type b vent is made of galvanized steel
16) one cubic foot of liquified petroleum produces,,, 2000- 2500 btu
17) the highest concentration of fuel that ignites is the UEL
18) the first section of duct installed that connects to the plenum
furnace is the
19) the top of a ladder should extend 3 feet
20) how much current goes thru the flame sensor? 1-10 microamps
21) to change cubic feet per minute delivered to a single the motor pulley size
speed belt driven blower, you should adjust
22) nitrogen combines with oxygen to form... NOX
23) when the burners are ignited, the blower is delayed to... allow the heat
100% verified solutions |questions with correct answers
2025 latest update!!
Terms in this set (76) Questions Verified Answers
1) using an ohmmeter, there is 120 VAC between high open
speed and ground wires, this indicates
2) if temperature rise is too high... increase fan speed
3) how many of the 3 OSHA conditions defining confined all 3
spaces must be met
4) what causes the temperature limit safety switch to shut fan motor failure
off the burner
5) flashback indicates the gas is flowing
slower than the speed
at which burn is
occurring
6) what type of connector is used to control noise in vibration eliminators
ductwork
7) if the main burner lights and after a minute the blower there is faulty blower
, fan comes on but the burner flames waver in one housing
corner...
8) a burner orifice... meters gas to the
burner
9) when lockout/tagout is used there should be 1 key
kept by the electrician
10) the gas pressure is usually 3.5
11) a spark igniter operates at 7,500 vac
12) a good thermocouple produces 30 millivolts
13) what must be present for combustion air, fuel and ignition
source
14) the innerds of a type b vent is made of aluminium
15) the outsides of a type b vent is made of galvanized steel
16) one cubic foot of liquified petroleum produces,,, 2000- 2500 btu
17) the highest concentration of fuel that ignites is the UEL
18) the first section of duct installed that connects to the plenum
furnace is the
19) the top of a ladder should extend 3 feet
20) how much current goes thru the flame sensor? 1-10 microamps
21) to change cubic feet per minute delivered to a single the motor pulley size
speed belt driven blower, you should adjust
22) nitrogen combines with oxygen to form... NOX
23) when the burners are ignited, the blower is delayed to... allow the heat
