Power Eng 5th Class study plan

Sketch and label a firetube boiler and a watertube boiler from memory, naming the furnace, shell or drums, tubes, tube sheets, and uptake, and state which way combustion gas flows in each.

Define the terms MAWP, design pressure, hydrostatic test pressure, and safety-valve set pressure, and compute each of the first three for a stated vessel example.

List the fittings and appurtenances a boiler must carry (safety valve, pressure gauge, water column, low-water cutoff, blowdown, feed check, main steam stop) and explain the function of each in one sentence.

Explain how a pressure vessel fails: describe creep, overheating from scale, and corrosion thinning, and identify the inspection method that detects each.

Read a simplified boiler drawing and mark the steam space, water space, and normal water level, then explain why the water column must be kept clear.

Sequence the cold start-up of a packaged boiler from pre-purge through main flame, stating the required purge time and the reason for each step.

Describe the three elements of the fire triangle and explain how each is controlled in a boiler furnace, then relate excess air to stack temperature and efficiency.

Explain the function of the flame scanner, the program relay, and the fuel valve proving system, and describe what happens on flame failure.

Differentiate on-off, high-low, and modulating firing control and state which load pattern suits each.

Carry out a routine shift: record steam pressure, water level, stack temperature, and draft, and state the corrective action for low water level, high steam pressure, and a smoking stack.

Explain combustion safety interlocks and describe a pre-ignition purge and a post-purge, including what would happen if the purge were bypassed.

Describe emergency procedures for a furnace explosion, a tube rupture, and a low-water condition, listing the immediate actions in order.

Summarize the operator's legal duties under boiler and pressure-vessel safety legislation: qualifications to hold a certificate of competency, logbook entries, accident reporting, and the limits of what an operator may alter.

Explain the purpose of the periodic inspection, the hydrostatic test, and the safety-valve pop test, and state who may witness each.

Identify the personal protective equipment and lockout/tagout steps required before entering a boiler or working on a fuel train.

Classify pumps as centrifugal, positive displacement reciprocating, or rotary, and match each to a feedwater, fuel oil, or sump duty.

Explain cavitation: its cause, its sound, its damage, and three ways to prevent it, including net positive suction head.

Describe the parts and operating principle of a reciprocating air compressor and state why an unloading device and a relief valve are needed.

Describe how to start, monitor, and shut down a feedwater pump, including checking suction valve position, discharge pressure, bearing temperature, and gland leakage.

Explain the function of the economizer, air preheater, superheater, and deaerator and state what each does to efficiency or water quality.

Explain why raw water is unacceptable as feedwater: describe scale, corrosion, carryover, and foaming and the damage each causes.

Describe external treatment (softening, demineralization, deaeration) and internal treatment (oxygen scavengers, scale inhibitors, alkalinity and pH control) and state which problem each addresses.

Interpret a water test sheet: given pH, total hardness, dissolved oxygen, conductivity, and alkalinity values, state whether each is in range and what corrective action follows.

Explain blowdown, both bottom and surface, and calculate how blowdown rate relates to dissolved solids concentration.

Describe the deaerator's role and the corrosion caused by dissolved oxygen and carbon dioxide in the feed system.

Explain how a pressure transmitter, thermocouple or RTD, and level probe produce a signal, and distinguish a switch from a transmitter.

Describe a simple control loop: identify the sensor, controller, and final control element in a boiler water-level or steam-pressure loop and explain proportional and on-off control action.

Apply Ohm's law and the power equation to calculate current, voltage, resistance, and power in simple series and parallel circuits.

Explain the purpose of fuses, circuit breakers, grounding, and lockout/tagout in a plant electrical system, and describe the danger of arc flash.

Describe how to calibrate or verify a pressure gauge and a level control using a known reference, and state why calibration records matter.

Explain the vapour-compression refrigeration cycle stage by stage and identify the evaporator, compressor, condenser, and metering device on a sketch.

Describe the safety hazards of refrigerants: frostbite, asphyxiation in low areas, and the legal rules on venting and handling, and state the leak-check and recordkeeping duties.

Explain how a building heating, ventilating, and air-conditioning system delivers heat and cooling, and describe the role of the air handler, filters, dampers, and controls.

Describe routine checks on a refrigeration or HVAC plant: suction and discharge pressures, superheat and subcooling, filter condition, and belt and bearing condition.

Explain how a cooling tower or chiller interacts with the boiler plant and why water treatment matters on the cooling side too.

Take two full timed practice exams under exam conditions and record the score for each domain separately.

Re-study the two weakest domains, using the missed questions to drive the review rather than rereading notes.

Recite from memory the emergency actions for low water, high pressure, flame failure, and tube rupture, and the fittings required on a boiler.

Redo every calculation type (MAWP, hydrostatic test pressure, blowdown, Ohm's law) without notes until each is correct twice in a row.

Assemble a one-page formula and definition sheet and confirm you can explain every term on it.