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Enlisted Surface Warfare Specialist (ESWS) Reactor Practice Test 2026 - Free ESWS Reactor Practice Questions and Study Guide course image
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  • Which of the following accurately describes the CRW/RMO's role during reactor operations?
  • What does RDO represent in reactor operations?
  • What is the job of the log recorder/ phone talker?
  • What is the key difference between feed water and potable water?
  • What is the responsibility of the Reactor Officer (RO)?
  • What is the purpose of the reactor department organizational manual?
  • Where does the throttle-man typically stand watch?
  • What does the term RMA refer to in the reactor department?
  • What does the acronym RO stand for in the reactor department?
  • What does MPA stand for in the context of propulsion systems?
  • What was the name of the first nuclear powered aircraft carrier?
  • What is the main responsibility of the Engineering Officer of the Watch (EOOW)?
  • What is the main purpose of the emergency diesel generators?
  • What are the main duties of the Reactor Mechanical Assistant (RMA)?
  • What role does the Main Propulsion Assistant play in a ship's operations?
  • What part of the A/C plant's process deals with removing heat?
  • What does RL stand for?
  • What are the responsibilities of the Reactor Controls Division?
  • What is the purpose of the shaft seal in a ship?
  • What does it mean when a reactor is described as "critical"?
  • Who is responsible for directly controlling the reactor?
  • Which rate typically stands watch as Reactor Operator underway?
  • What does "Locked Shaft" refer to in ship operations?
  • How often does the nuclear propulsion system need to be refueled?
  • In terms of watchstanding, what does the EOOW primarily oversee?
  • What is the flow rate (in gpm) of the potable water pump?
  • What is primarily responsible for keeping the galley's food cool?
  • What is one of the main roles of the guarding valve in a reactor system?
  • What rate is responsible for being an Emergency Liquid Tank operator?
  • Which component is responsible for pumping gas within the A/C plants?
  • What should be done if a yellow polly bag is found on board?
  • What is the primary function of the propulsion turbines?
  • What is the Load Dispatcher responsible for?
  • Why is removing air from the water important in the de-aerating feed tank?
  • What is the primary purpose of the ship's main jacking gear?
  • What is the primary function of reboilers on the ship?
  • What is the main responsibility of the CRA?
  • What is one of the primary functions of the PPWS?
  • What is a critical function of the CRW/RMO in reactor management?
  • Which watch standers are responsible for monitoring operations in Damage Control Central?
  • How many blades does a ship's propeller typically have?
  • How often does the Operation Reactor Safeguard Exam occur?
  • In what system is the high-pressure air primarily used?
  • Which aspect is NOT typically under the purview of the Reactor Laboratory?
  • What does the Reactor Electrical Assistant focus on?
  • How many distilling units are typically located in each Main Machinery Room (MMR)?
  • What does PPWS stand for in the context of reactor operations?
  • What is the primary use of Control Air on a ship?
  • Who are the watch standers that stand watch in the Engine Order Telegraph?
  • What is the impact of the ship during "Restricted Maneuvering"?
  • The Engineering Laboratory Technician (ELT) contributes to which of the following areas?
  • What does ELT stand for in the reactor context?
  • What was the name of the first naval nuclear-powered vessel?
  • What is the function of chlorinators in the water system?
  • Who controls the electrical loads and what is their rate?
  • What type of communication is primarily handled by the log recorder/ phone talker?
  • What are the four stages of the steam cycle?
  • What is a significant advantage of using nuclear power on ships?
  • Which type of reactor is utilized to pressurize the core water?
  • What does the Ahead throttle valve control?
  • What is the primary purpose of the coolant turbine generators?
  • What does ABT stand for in relation to reactor operations?
  • In what areas is the REA responsible?
  • What does NPMTT stand for?
  • What is the normal electric plant lineup while steaming?
  • What is a critical function of the Load Dispatcher during operations?
  • What is a crucial aspect of the REA's responsibilities?
  • How many SSACs are located in total across the MMRs and RARs?
  • What action is performed by the main condenser in the steam cycle?
  • What does SSAC stand for?
  • What does RC stand for in a reactor context?
  • Which of the following statements is true regarding nuclear power?
  • What is the function of MMR in a ship's reactor?
  • How many distilling units are present on the ship?
  • Which type of air is used for elevators and auto starting diesel generators?
  • Who is recognized as the father of Nuclear Power?
  • What is the total number of potable water tanks found on the vessel?
  • What is the function of the Astern Throttle valve?
  • What could indicate that a ship is operating under "Split steam plant condition"?
  • What was the first naval nuclear-powered surface ship?
  • Which valve would be used to reverse the ship's motion?
  • What is one of the key responsibilities of the "M" department?
  • What is the primary responsibility of the CMO/SMO?
  • Where does the EOOW typically stand watch?
  • Which watch is responsible for ensuring safe levels of water are maintained?
  • What is the purpose of the ORSE?
  • Which watch team is primarily responsible for reactor operations during normal circumstances?
  • What does the ship's control bill provide?
  • What is the primary source of fuel that powers the reactor?
  • What is the primary function of the RAR?
  • What does the term "M" in reactor context refer to?
  • What is maintained by the Main Air Ejectors in the reactor system?
  • What is the function of reactor auxiliaries?
  • How many York A/C plants are present on the vessel?
  • What is the effect of a "Trailing shaft" condition?
  • What does TLD stand for in the context of radiation measurement?
  • What type and location of heat exchangers are the steam reboilers onboard?
  • What is the primary function of the reboiler heating system?
  • Which of the following is not a type of air mentioned in the reactor practice test?
  • What purpose does a TLD serve?
  • What does the acronym CRA stand for?
  • What does the REA stand for?
  • How many potable water pumps are onboard the vessel?
  • What is the pressure of low-pressure (LP) air?
  • How many Ship Service Turbine Generators (SSTG) are typically located in each Main Machinery Room (MMR)?
  • What color is the chill water used in the air conditioning process?
  • What is the primary function of the main condenser?
  • What pressure range does the Ship Service Air Compressor (SSAC) supply?
  • What is the role of the CMO/SMO?
  • What does RAR refer to in reactor terminology?
  • What is the main responsibility of the PPWO?
  • Who is responsible for directly controlling the shaft rpm?
  • What is the pressure range for high-pressure air compressors (HPACs)?
  • What are the Fighting 5 load centers and what mission critical load do they provide?
  • Which of the following is a safety measure when encountering a yellow polly bag?
  • Which rate typically operates the coolant turbine generators?
  • What type of distilling plant is utilized onboard the vessel?
  • How is feed water typically processed before use?
  • What type of tools utilize Ship Service Air?
  • What is the location of shafts 2 and 3?
  • What does EOS stand for?
  • What is the main focus of the EOS in reactor operations?
  • What does EOOW stand for?
  • Where is the second SSAC located?
  • What does CSC stand for?
  • What is the role of seawater in relation to A/C plants?
  • What is the main responsibility of the CRW/RMO?
  • What is the purpose of the Main Air Ejectors?
  • What does RE refer to in the context of reactor operations?
  • What is the purpose of the reboiler heating drain?
  • What is the overall control duty of the PPWO associated with?
  • What is the primary purpose of Reactor Controls (RC)?
  • What is the role of the strut bearing in a ship's propulsion system?
  • In what condition does one reactor supply steam to two different plants?
  • What function does the NPMTT perform?
  • What defines a propulsion plant casualty?
  • What is the purpose of the Reduction Gears?
  • PPWO is an acronym for what term?
  • What is affected when experiencing a "Trailing Shaft" situation on board?
  • What is the primary purpose of the potable water risers?
  • What is a primary duty of the MPA?
  • What screws are located behind the rudders?
  • Where are the reboilers typically located?
  • What is the function of the guarding valve in the system?
  • What is the name of the reactor control room?
  • What is the primary function of potable water pumps onboard?
  • What do the acronyms RO and SRO stand for?
  • Where is the first Ship Service Air Compressor (SSAC) typically located?
  • What is the physical pressure maintained by potable water pumps?
  • Which rating is typically not associated with Reactor Operator watch standing?
  • What does EOS stand for?
  • What is the primary responsibility of the Reactor Laboratory (RL)?
  • What is the primary responsibility of the reactor electrical systems?
  • Which of the following best describes the duties of the Reactor Duty Officer?
  • What is the capacity of each distilling unit per day?
  • What impact does a "Split steam plant condition" have on a ship?
  • In which plants are shafts 1 and 4 located?
  • What do the suffixes in RO/SRO indicate about their roles?
  • Who holds the position of Chief Reactor Watch and Shutdown Reactor Mechanical Operator (CRW/RMO)?
  • What is the primary task of the compressor in the A/C systems?
  • What are the primary responsibilities of the Engineering Laboratory Technician (ELT)?
  • How many shafts are typically found in the reactor systems?
  • What is the purpose of the de-aerating feed tank?
  • What is the primary function of the CACs in the reactor plant?
  • What occurs during a "Cross-connected steam plant" situation?
  • What is the role of the Enclosed Operation Station?
  • What term describes the normal electrical power generation method on the vessel?
  • What is the primary role of the RDO during port watch?
  • Which of the following is NOT a hotel service provided by the ship?
  • What type of reactor is commonly used in this context?
  • Who controls water inventory and what is their rate?
  • How many high-pressure air compressors (HPACs) are found in each MMR?
  • The propulsion system strut bearing supports which key component?
  • What does ORSE stand for?
  • What is the primary function of the main engine on a ship?
  • Which condition describes when a ship's reactor cannot supply power to its shaft?
  • What is the purpose of the main thrust bearing in a ship?
  • What is the pressure of high-pressure (HP) air?
  • Where are the CACs located in the Reactor Auxiliary Room?
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