RETA CIRO study plan

Define pressure, temperature, heat, and latent/sensible heat in your own words and give one plant example of each

Convert between psig and psia and look up ammonia saturation temperatures for at least ten pressures without a chart error

Sketch the four basic stages of the refrigeration cycle and label the state of the refrigerant entering and leaving each component

Identify the function of the compressor, condenser, expansion device, and evaporator and state what happens to pressure and enthalpy across each

Compare reciprocating, screw, and rotary vane compressors on capacity control method and typical industrial application

Explain the purpose of the intercooler, oil separator, receiver, accumulator, and purger and state where each sits in the flow path

Trace refrigerant flow through a two-stage compression system from evaporator back to evaporator, naming every vessel and valve in order

Describe how compressor capacity is reduced and what happens to suction and discharge pressures when it is

Distinguish direct-expansion, gravity-flooded, and pumped-recirculated feed methods by refrigerant charge, coil performance, and common use case

Describe the sequence and purpose of hot-gas, water, and electric defrost and state which is used in which application

Explain how evaporative condensers reject heat and list the water-treatment and freeze-protection checks they require

Describe the operating role of high-side floats, low-side floats, hand expansion valves, and thermostatic expansion valves in an industrial plant

List the PPE required for ammonia work and state the exposure threshold at which you must evacuate versus wear respiratory protection

Sequence the response to an ammonia release from detection through notification, isolation, evacuation, and re-entry

Apply lockout/tagout and permit-to-work steps to a pump repair scenario, naming each energy source to be isolated

Write the normal startup and normal shutdown sequence for a compressor and state the readings you verify at each step

Identify the logs, rounds, and recordkeeping items an operator is responsible for during a shift

Describe safe handling of oil draining, hot work, and confined-space entry in a machinery room and name the permit each requires

Solve Ohm's law problems for voltage, current, and resistance and apply them to a motor circuit

Calculate total resistance and current in series and parallel circuits and explain why parallel is used for plant loads

Demonstrate correct use of a multimeter to measure voltage, current, and resistance, including where the meter is placed in each case

Read common electrical symbols for contacts, coils, switches, overloads, and timers and match each to its ladder-diagram symbol

Trace a motor starter circuit from control transformer through stop, start, seal-in contact, and overload to the coil

Explain the difference between a line and a control circuit and state the typical control voltage and where it comes from

Troubleshoot a non-starting motor by listing the test points to check in order, from power supply to coil

Draw a ladder diagram for a pump-down or defrost control cycle and explain each rung in one sentence

Diagnose three given control-circuit faults by describing the symptom and the test that isolates the cause

Re-derive the refrigeration cycle from memory and connect each safety control to the part of the cycle it protects

Explain how a high-pressure cutout, low-pressure cutout, and oil-pressure safety switch each act on the compressor control circuit

Complete a timed 60-question mixed practice set covering all five domains and review every missed item to root cause

Re-state the key formulas, safety thresholds, and control sequences from memory in a single reference sheet

Re-work the weakest two topics identified by practice scores until you can explain them aloud without notes

Walk through a full plant scenario from startup to a simulated alarm and justify each operator action