Oil Burners Questions and Answers Rated A+

Oil Burners Questions and Answers Rated A+ According to NFPA31-2001, what is the minimum size of the vent pipe on an oil storage tank 1 1/4 inch Nozzles are available with three different spray patterns: Solid, semi-hollow, hollow What type of motor is used on a residential high pressure oil burner Split phase The most common motor speeds used in amerian made burners are 1725 and 3250 rpm If an oil has a high viscosity 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 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. A plugged heat exchanger 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. Insufficient combustion air What is a possible problem if an oil fired furnace has a stack temperature reading over 750 degrees F 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? The burner motor could be defective. On a high pressure gun burner, what two problems can prevent oil from flowing to the nozzle? 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? The closed position. If a furnace has n oil delivery problem, what three tests are used to troubleshoot the system? Test oil pump pressure burner motor operation and the nozzle assembly. A common over the fire draft for an oil furnace is -.01" WC to -.02" WC A common breech draft for an oil furnace is -.03" WC to -.06" WC If the draft through a furnace is too high. What adjustment should be made? Adjust the barometric damper to more of an open position What does a high smoke reading indicate on an oil fired furnace? Not enough primary air According to NFPA31-2001, what is the minimum size of the fill pipe on an oil storage tank. 1 1/2 inch What measurement is taken to hen performing a combustion efficiency test Carbon dioxide An oil pump has to lift oil from an oil storage tank that is located underground. Each foot of vertical lift will cause a vacuum on the suction line of 1" hg If a high pressure gun type oil burner has sufficient spark and adequate oil pump pressure, which of the following could be a cause of system malfunction? A plugged nozzle. In all residential oil heating systems, the high limit control must be Line voltage and wire in series with the primary control When testing a fuel unit cut-off, the pressure at the nozzle port should: Drop and hold at about 80% if the pumps pressure setting