OIL HEAT EXAM QUESTIONS AND
ANSWERS. VERIFIED 2025/2026.
According to NFPA31-2001, what is the minimum size of the vent pipe on an oil storage tank -
ANS 1 1/4 inch
Nozzles are available with three different spray patterns: - ANS Solid, semi-hollow, hollow
What type of motor is used on a residential high pressure oil burner - ANS Split phase
The most common motor speeds used in amerian made burners are - ANS 1725 and 3250
rpm
If an oil has a high viscosity - ANS It is a thicker oil
A service technician performs a combustion efficiency test. There is too much overfire draft.
What can the technician do to decrease the amount of draft in the system - ANS Open the
barometric
A technician arrives on a service call for an oil fired furnace the overfire draft reading is +.02"
WC. And the breach is -.04" WC. What could be the cause for this type of problem. - ANS A
plugged heat exchanger
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, While performing a combustion effiency test on an oil fired furnace. A smoke reading of #5 is
obtained. Which of the following could cause this problem. - ANS Insufficient combustion air
What is a possible problem if an oil fired furnace has a stack temperature reading over 750
degrees F - ANS Excessive combustion air.
On a stack mount primary control system, the thermostat is set to call for heat. The system
sparks but does not fire. A further check shows that the burner motor is not in operation. Which
of the following could be the cause of this problem? - ANS The burner motor could be
defective.
On a high pressure gun burner, what two problems can prevent oil from flowing to the nozzle? -
ANS A broken couple in hand a plugged inline filter.
In what position should the cold contacts of a stack relay be at the start up of an oil fired
furnace? - ANS The closed position.
If a furnace has n oil delivery problem, what three tests are used to troubleshoot the system? -
ANS Test oil pump pressure burner motor operation and the nozzle assembly.
A common over the fire draft for an oil furnace is - ANS -.01" WC to -.02" WC
A common breech draft for an oil furnace is - ANS -.03" WC to -.06" WC
If the draft through a furnace is too high. What adjustment should be made? - ANS Adjust the
barometric damper to more of an open position
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS. VERIFIED 2025/2026.
According to NFPA31-2001, what is the minimum size of the vent pipe on an oil storage tank -
ANS 1 1/4 inch
Nozzles are available with three different spray patterns: - ANS Solid, semi-hollow, hollow
What type of motor is used on a residential high pressure oil burner - ANS Split phase
The most common motor speeds used in amerian made burners are - ANS 1725 and 3250
rpm
If an oil has a high viscosity - ANS It is a thicker oil
A service technician performs a combustion efficiency test. There is too much overfire draft.
What can the technician do to decrease the amount of draft in the system - ANS Open the
barometric
A technician arrives on a service call for an oil fired furnace the overfire draft reading is +.02"
WC. And the breach is -.04" WC. What could be the cause for this type of problem. - ANS A
plugged heat exchanger
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, While performing a combustion effiency test on an oil fired furnace. A smoke reading of #5 is
obtained. Which of the following could cause this problem. - ANS Insufficient combustion air
What is a possible problem if an oil fired furnace has a stack temperature reading over 750
degrees F - ANS Excessive combustion air.
On a stack mount primary control system, the thermostat is set to call for heat. The system
sparks but does not fire. A further check shows that the burner motor is not in operation. Which
of the following could be the cause of this problem? - ANS The burner motor could be
defective.
On a high pressure gun burner, what two problems can prevent oil from flowing to the nozzle? -
ANS A broken couple in hand a plugged inline filter.
In what position should the cold contacts of a stack relay be at the start up of an oil fired
furnace? - ANS The closed position.
If a furnace has n oil delivery problem, what three tests are used to troubleshoot the system? -
ANS Test oil pump pressure burner motor operation and the nozzle assembly.
A common over the fire draft for an oil furnace is - ANS -.01" WC to -.02" WC
A common breech draft for an oil furnace is - ANS -.03" WC to -.06" WC
If the draft through a furnace is too high. What adjustment should be made? - ANS Adjust the
barometric damper to more of an open position
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
