NIULPE Class 3 study plan

Map the boiler pressure-parts boundary (shell, drum, tubes, headers, furnace) and list at least 15 fittings by name, location, and protective function without notes.

Explain how shell thickness, tube spacing, and staybolt pitch are governed by design pressure and temperature, using at least three worked formula examples.

Differentiate fire-tube, water-tube, and packaged boiler construction and state two operating consequences of each layout.

Identify safety and relief valve, gauge glass, low-water cutoff, and blowdown connection requirements on a typical drum and describe what each protects against.

Trace how ASME Boiler and Pressure Vessel Code sections apply to a Class 3 operating engineer's daily decisions, citing section numbers for construction, care, and welding.

Distinguish the roles of the jurisdiction, authorized inspector, and operating engineer during new construction and alteration.

List recordkeeping obligations (manufacturer's data report, inspection certificates, relief valve testing) and where each is filed.

Solve five design-style problems converting design pressure, allowable stress, and joint efficiency into required thickness.

Describe the four phases of combustion and the three T's, and diagnose one symptom of each failure mode (incomplete mixing, low temperature, short residence time).

Calculate excess air, stack loss trends, and theoretical versus actual air requirements from given flue gas data.

Explain the firing sequence of a programming flame safeguard control from purge through main flame and identify the interlocks that must prove before each step.

Compare on-off, high-low, and modulating burner control and state which load profiles suit each.

Draft the operator actions for a flame failure, low-water trip, and high-pressure trip in correct sequence.

Build an inspection checklist for the waterside and fireside of a boiler, listing what to look for at tube ends, ligaments, staybolts, and refractory.

Explain hydrostatic test procedure, required test pressure basis, and the conditions that require one.

Describe accepted repair methods for tube replacement, rolled versus welded joints, and post-repair testing and documentation.

State the lay-up procedures for short and long idle periods and the corrosion mechanism each prevents.

Identify the difference between routine operator checks, internal inspection, and a jurisdictional inspection with respect to frequency and authority.

Identify pressure vessel classifications, code stamping, and the fittings required on an air receiver versus a liquid service vessel.

Explain how piping expansion, support spacing, and flexibility analysis prevent overstress, and calculate thermal growth for a given length and temperature rise.

Match valve types (gate, globe, ball, check, safety, control) to their intended service and describe failure symptoms for each.

Explain pump cavitation, net positive suction head, and affinity laws, and compute a new flow and head after an impeller speed change.

Describe compressor types and the safety devices protecting a reciprocating air compressor.

Trace steam flow through a turbine stage, distinguishing impulse and reaction blading and the function of nozzles, diaphragms, and glands.

Explain turbine overspeed protection, trip-and-throttle valve action, and the checks performed before rolling a turbine.

Describe gas turbine startup sequence from turning gear through full load, including critical speed and vibration limits.

Interpret a P&ID segment by identifying instruments, control loops, and interlocks, and explain the purpose of each safety device on a boiler trip string.

Explain calibration, span, zero, and how a transmitter failure mode (fail-safe versus fail-open) affects a trip circuit.

Explain the internal treatment programs for scale, oxygen, and carryover control, and the tests used to monitor each (conductivity, pH, phosphate, dissolved oxygen, silica).

Describe the corrosion mechanisms (caustic embrittlement, oxygen pitting, galvanic, chelant attack) and the control measure for each.

Explain dew point, superheat, and steam purity effects on turbine deposits and corrosion.

Trace motor starting circuits, overload protection, and the difference between a contactor and a starter for a large boiler feed pump motor.

Describe emergency power transfer, grounding, and lockout/tagout for electrical work on plant equipment.

Consolidate the code and regulatory content into a one-page reference of inspection intervals, certificate renewals, and record retention.

Re-solve missed items from earlier weeks and explain the reasoning aloud for each.

Complete a full-length timed simulation across all ten domains and record the score per domain.

Identify the three weakest domains by score and produce a targeted final-week review list of 15 facts to memorize.