6. NATE INDUSTRY COMPETENCY
6. NATE Industry Competency Exam: Oil Furnaces
Questions With Answers Latest Update
On a new oil furnace installation, the oil pump pressure is found to be 50 PSI. which of the following
actions should be taken?
a. Increase the pump pressure.
b. Add a new fuel filter.
c. Reduce the pump pressure.
d. No action needed. - ✔✔✔ - A
After installation and 20 min. of run time and oil furnace is found to have CO2 if 8%. which of the
following could cause the low CO2 reading?
a. Oil pump pressure of 100 psi.
b. Misaligned cad cell.
c. Excess primary air.
d. Dirty combustion air blower. - ✔✔✔ - C
After achieving steady-state efficiency on an oil furnace, which of the following are the indications of
good combustion?
a. 0% CO2 and #0 smoke.
b. 8% CO2 and #5 to #6 smoke.
c. 10 to 12% CO2 and #0 to #1 smoke.
d. 21% CO2 and #0 smoke. - ✔✔✔ - C
, 6. NATE INDUSTRY COMPETENCY
On startup of an oil unit, the technicians smoke test shows the unit to have #8 smoke. which of the
following is the correct action that should be taken?
a. Increase primary air.
b. Install a larger size nozzle.
c. Decrease the over-the-fire draft.
d. Install a wide angle nozzle. - ✔✔✔ - A
During a maintenance inspection, if a heavy coating of soot is present on the cad cell in the control
system of an oil primary burner, after resetting the primary control the technician is most likely to
discover that the:
a. Burner will start and run normal for a short time, then will lock out.
b. Line voltage circuit breaker will trip.
c. Primary control is defective.
d. Burner will not start. - ✔✔✔ - A
In regard to a residential oil heating furnace, temp, rise though the furnace is calculated by the
formula:
a. Temperature of the indoor supply air minus temperature of the return air.
b. Temperature of the outside air minus temperature of inside air.
c. Indoor temperature minus outdoor temperature.
d. Temperature of the indoor supply air plus temperature of the indoor air. - ✔✔✔ - A
On a "no heat" service call for an oil fired furnace, what is the main safety precaution that the
technician must take before attempting to fire the oil furnace?
6. NATE Industry Competency Exam: Oil Furnaces
Questions With Answers Latest Update
On a new oil furnace installation, the oil pump pressure is found to be 50 PSI. which of the following
actions should be taken?
a. Increase the pump pressure.
b. Add a new fuel filter.
c. Reduce the pump pressure.
d. No action needed. - ✔✔✔ - A
After installation and 20 min. of run time and oil furnace is found to have CO2 if 8%. which of the
following could cause the low CO2 reading?
a. Oil pump pressure of 100 psi.
b. Misaligned cad cell.
c. Excess primary air.
d. Dirty combustion air blower. - ✔✔✔ - C
After achieving steady-state efficiency on an oil furnace, which of the following are the indications of
good combustion?
a. 0% CO2 and #0 smoke.
b. 8% CO2 and #5 to #6 smoke.
c. 10 to 12% CO2 and #0 to #1 smoke.
d. 21% CO2 and #0 smoke. - ✔✔✔ - C
, 6. NATE INDUSTRY COMPETENCY
On startup of an oil unit, the technicians smoke test shows the unit to have #8 smoke. which of the
following is the correct action that should be taken?
a. Increase primary air.
b. Install a larger size nozzle.
c. Decrease the over-the-fire draft.
d. Install a wide angle nozzle. - ✔✔✔ - A
During a maintenance inspection, if a heavy coating of soot is present on the cad cell in the control
system of an oil primary burner, after resetting the primary control the technician is most likely to
discover that the:
a. Burner will start and run normal for a short time, then will lock out.
b. Line voltage circuit breaker will trip.
c. Primary control is defective.
d. Burner will not start. - ✔✔✔ - A
In regard to a residential oil heating furnace, temp, rise though the furnace is calculated by the
formula:
a. Temperature of the indoor supply air minus temperature of the return air.
b. Temperature of the outside air minus temperature of inside air.
c. Indoor temperature minus outdoor temperature.
d. Temperature of the indoor supply air plus temperature of the indoor air. - ✔✔✔ - A
On a "no heat" service call for an oil fired furnace, what is the main safety precaution that the
technician must take before attempting to fire the oil furnace?
