NATE Oil Service study plan

Define the four phases of oil heating operation (storage, delivery, atomization, combustion) and explain how a fault in one phase shows up in the others

Convert between gallons, BTU content, and nozzle firing rate to estimate heat input for three sample systems

Explain heat loss paths in a hydronic or forced-air oil system and identify which components compensate for each loss

Describe the role of draft, barometric control, and chimney effect in safe venting at a conceptual level

Trace the oil path from tank to nozzle and label pressure, temperature, and filtration changes at each stage

Match nozzle spray patterns and angles to combustion chamber geometry and explain the consequence of a mismatch

Explain the three T's of combustion (time, temperature, turbulence) and how each is affected by burner adjustment

Identify the products of complete and incomplete combustion and the safety significance of each

Describe the sequence of a typical oil burner startup from call for heat through steady-state firing

Explain the function of the electrodes, transformer, cad cell, and primary control during light-off and flame proving

Calculate the effect of nozzle size, pump pressure, and excess air on CO2, O2, and smoke readings

Interpret a combustion test report and decide whether adjustments are needed

Explain tank types, materials, and placement rules that affect safe fuel delivery

Describe the difference between one-pipe and two-pipe oil delivery systems and when each is required

Identify causes of air in the oil line, oil-line vacuum problems, and nozzle fouling

Explain tank-to-burner piping components including filters, shutoff valves, and safety devices

Explain tank venting, fill-pipe, and gauge requirements and the hazards of improper venting

Describe fuel oil grades and how viscosity and sulfur content affect burner setup and storage

Identify environmental and safety concerns for indoor, outdoor, and underground tanks including leak detection

Explain the purpose and operation of tank safety valves, OSVs, and overfill prevention

Read a burner wiring diagram and trace the control circuit from thermostat through primary control to the burner motor

Explain the function of the primary control, cad cell relay, and limit controls in the safety sequence

Describe lockout, recycle, and flame-failure behavior and the correct diagnostic response to each

Measure and interpret voltage, continuity, and resistance in a burner circuit

Explain thermostat types, anticipators, and how setting affects cycle length and comfort

Describe zone control, circulator control, and aquastat functions in an oil-fired hydronic system

Identify common electrical faults in oil systems and the meter tests that isolate them

Explain how control faults can mimic fuel or combustion problems and how to rule them out

Review all four domains using a self-made question set and score at least 80 percent

Re-derive the key formulas and safety sequences from memory without notes

Practice explaining three common service scenarios end to end in under five minutes each

Identify your two weakest areas and complete targeted review of each