ESCO HEATING 208 EXAM QUESTIONS
AND CORRECT ANSWERS
The "bonnet capacity" of a furnace is:
A: furnace category rating.
B: furnace venting category.
C: furnace input BTU's.
D: furnace output BTU's - CORRECT ANSWER-D
A gas furnace installed at altitudes above feet
needs to have adjustments to operate properly.
A:500
B: 1000
C: 1,500
D: 2,000 - CORRECT ANSWER -D
Failure to polarize a replacement low voltage transformer in a electronic
ignition furnace will:
A: cause no problems.
B: short the PC board.
C: ground the PC
board.
D: cause flame rectification problems. - CORRECT ANSWER-D
A spark ignitor operates at
VAC.
A: 1,000
,B: 5,000
C: 8,000
D: 7,500 and higher - CORRECT ANSWER-D
Which type of metallic conduit is recommended for indoor use only?
A: EMT
B: IMC
C: PVC
D: MCC - CORRECT ANSWER-A
A dedicated vent system:
A; serves a combination of appliances.
B: is the only vent for an appliance.
C: is a manifold vent for an appliance.
D: is a muIti-position vent for an appliance. - CORRECT ANSWER-B
LP gas has a specific gravity of:
A: .4-.8
B: 1.0-1.1
C: 1.5-2.0
D: 2.5 -3.0 - CORRECT ANSWER-C: 1.5-2.0
What is the purpose of a spoiler screw located on a burner?
A: Mix combustion and dilution air
B: Mix primary and secondary air.
C: Mix primary air and gas.
D: Mix dilution and excess air. - CORRECT ANSWER-C: Mix
, primary air and gas
Furnace limit switches are wired in series with the:
A: low speed fan
B: high speed fan
C: gas valve
D: heat anticipator - CORRECT ANSWER-C: gas valve
A technician is using an extension ladder to work on roof top unit. The
top of the ladder should extend beyond the support point.
A: l foot
B: 2 feet
C: 3 feet
D: 4 feet - CORRECT ANSWER-C: 3 feet
A technician determines that a natural gas furnace has a
defective heat exchanger. The technician should:
A: inform the homeowner.
B: turn the thermostat off.
C: turn the gas to the furnace off.
D: All of the above. - CORRECT ANSWER-D: All of the above.
A natural gas (standing pilot) furnace usually requires
gas pressure at the manifold and burners.
A: 3.5 in- W.C.
B: 4.2 in. W.C.
C: 5.0 in, W.C.
D: 7.0 in. W.C. - CORRECT ANSWER-A: 3.5 in- W.C.
The vent system for a condensing furnace is classified as
AND CORRECT ANSWERS
The "bonnet capacity" of a furnace is:
A: furnace category rating.
B: furnace venting category.
C: furnace input BTU's.
D: furnace output BTU's - CORRECT ANSWER-D
A gas furnace installed at altitudes above feet
needs to have adjustments to operate properly.
A:500
B: 1000
C: 1,500
D: 2,000 - CORRECT ANSWER -D
Failure to polarize a replacement low voltage transformer in a electronic
ignition furnace will:
A: cause no problems.
B: short the PC board.
C: ground the PC
board.
D: cause flame rectification problems. - CORRECT ANSWER-D
A spark ignitor operates at
VAC.
A: 1,000
,B: 5,000
C: 8,000
D: 7,500 and higher - CORRECT ANSWER-D
Which type of metallic conduit is recommended for indoor use only?
A: EMT
B: IMC
C: PVC
D: MCC - CORRECT ANSWER-A
A dedicated vent system:
A; serves a combination of appliances.
B: is the only vent for an appliance.
C: is a manifold vent for an appliance.
D: is a muIti-position vent for an appliance. - CORRECT ANSWER-B
LP gas has a specific gravity of:
A: .4-.8
B: 1.0-1.1
C: 1.5-2.0
D: 2.5 -3.0 - CORRECT ANSWER-C: 1.5-2.0
What is the purpose of a spoiler screw located on a burner?
A: Mix combustion and dilution air
B: Mix primary and secondary air.
C: Mix primary air and gas.
D: Mix dilution and excess air. - CORRECT ANSWER-C: Mix
, primary air and gas
Furnace limit switches are wired in series with the:
A: low speed fan
B: high speed fan
C: gas valve
D: heat anticipator - CORRECT ANSWER-C: gas valve
A technician is using an extension ladder to work on roof top unit. The
top of the ladder should extend beyond the support point.
A: l foot
B: 2 feet
C: 3 feet
D: 4 feet - CORRECT ANSWER-C: 3 feet
A technician determines that a natural gas furnace has a
defective heat exchanger. The technician should:
A: inform the homeowner.
B: turn the thermostat off.
C: turn the gas to the furnace off.
D: All of the above. - CORRECT ANSWER-D: All of the above.
A natural gas (standing pilot) furnace usually requires
gas pressure at the manifold and burners.
A: 3.5 in- W.C.
B: 4.2 in. W.C.
C: 5.0 in, W.C.
D: 7.0 in. W.C. - CORRECT ANSWER-A: 3.5 in- W.C.
The vent system for a condensing furnace is classified as
