RETA Ammonia Refrigeration Practice Exam

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• Who is responsible for using the prescribed PPE when performing a task?
• System entry, often referred to as _______ is any activity that involves opening the system.
• Why is a non-condensable a problem?
• What color is commonly used to identify ammonia piping?
• What is superheat and why is it important?
• Commonly used to control the refrigerant level in the vessels
• Which PSM element is used to identify hazards and evaluate risks before changes are implemented?
• All matter can only exist in these states?
• The relationship between area and force is described by which physical quantity?
• Which device meters the flow of refrigerant into the evaporator by regulating the pressure difference between the high-pressure side and the low-pressure side?
• Which of the following is NOT a typical compression ratio for screw, rotary vane, or high-speed reciprocating compressors?
• At atmospheric pressure (14.7 psia), ammonia boils at?
• Where should ammonia detectors be placed for effective coverage?
• Which term describes heat energy involved in phase changes rather than temperature change?
• What is the purpose of an interlock in control systems?
• Which condition would restricted airflow through the condenser most likely cause?
• What component stores liquid ammonia and provides a stable supply to the evaporators?
• Lockout/Tagout (LOTO) is used to
• Which compression ratio is associated with a high-speed reciprocating compressor?
• Which statement best describes the purpose of incident investigation under PSM?
• Which type of heat energy causes a change in temperature and can be sensed with a thermometer?
• Which statement about a flooded evaporator is true?
• What is the goal of Emergency Planning and Response?
• Trapped ammonia liquid will increase in pressure between ____ and ____ psi for each degree Fahrenheit the temperature is increased.
• What is subcooling and why is it important?
• Which quantity is used to describe how hot or cold something is?
• What valve is the main shutoff valve for the entire system and can be found at the liquid outlet of the receiver
• What valve is either fully opened or fully closed? They are designed with a backseat and foreseat that prevent refrigerants from bleeding by?
• What is the primary purpose of a refrigeration system?
• What is the purpose of a Pre-Startup Safety Review (PSSR)?
• What electrical classifications are typically used in ammonia facilities for hazardous locations?
• The most lethal electrical shock level occurs at what current range when the path crosses the heart?
• Which statement correctly describes a direct expansion (DX) evaporator?
• What rejects the heat absorbed by the evaporator and compressor?
• Why is training essential in ammonia safety?
• What is the term for gases exiting at a temperature higher than their saturation temperature?
• What term describes a process that removes heat from a space and transfers it to a predetermined area?
• Heat transfer through a solid via direct contact is known as?
• What device measures heat energy and provides a temperature reading?
• Why are leaks vented through dedicated relief lines to a safe outdoor area or scrubber?
• How are ammonia leaks typically vented to minimize exposure?
• Immediately Dangerous to Life and Health (IDLH) is?
• What is a key reason to keep the refrigerant charge within design specifications?
• Which device is commonly used to control refrigerant level in vessels by sensing the liquid level and actuating a valve?
• What is the purpose of purging non-condensables?
• The volume of vapor drawn into a compressor is expressed as?
• Which statement describes the service life of rupture disks in safety applications?
• Heat energy during the change of state between solid and liquid is called what?
• The process by which heat is transferred in solid materials due to molecular interactions without bulk movement is called what?
• What provides separation between the high and low side, to meter the flow of refrigerants into the evaporator?
• How much volt power can be deadly if the individual is well grounded?
• In the context of PSM, which component complements information, procedures, and training to handle potential releases?
• What does Mechanical Integrity require?
• The EPA's Risk Management Plan (RMP) program is designed to
• The pressure of the air exerted over a square inch area at the surface of the earth at sea level is?
• Pressure is expressed as?
• The velocity at the outlet of a fan is measured in which unit?
• Which description applies to a liquid at a temperature lower than its saturation temperature?
• The process by which heat is exchanged through the emission of photons, without requiring matter, is known as what?
• The amount of heat energy transferred, or the number of BTU's required to raise 1 Ib. of a given substance 1 F is?
• Upper Explosive Limit (UEL) is what percentage?
• What does a typical ammonia plant start-up sequence include?
• Which statement about PEL is true?
• Latent heat of Fusion is associated with which phase change?
• Which ratio correctly matches a rotary vane compressor?
• Which ambient condition can increase head pressure?
• What is the purpose of purge non-condensables during start-up?
• How much BTUs is required to melt one pound of ice at 32 F?
• What term describes the condition where liquids can change into vapor or vapor into liquid?
• Which set correctly lists the states of matter described in this material?
• Heat transfer by circulation of a fluid in direct contact is known as?
• The fire diamond is divided into how many sections?
• Which statement best describes the purpose of a hot work permit?
• What absorbs heat from the product to be cooled?
• The condition of a gas that leaves a system at a higher temperature than its saturation temperature is called what?
• How does a flooded evaporator operate?
• What does IDLH stand for?
• Which statement accurately describes a Pre-Startup Safety Review (PSSR)?
• What is the compression ratio for a high speed reciprocating compressor?
• ANSI/ASHRAE 34 defines the IDLH for anhydrous ammonia as how many ppm?
• The quantity of water flowing into an evaporative condenser basin could be expressed in what unit?
• The IDLH value for anhydrous ammonia as defined by ANSI/ASHRAE 34 is?
• Which statement best describes the purpose of Process Hazard Analysis (PHA)?
• What is the purpose of the NFPA 704 system?
• Which compression ratio is characteristic of a screw compressor?
• What is a P&ID used for?
• What does head pressure mean in a refrigeration system?
• Which statement best describes Operating Procedures?
• Which component absorbs heat from the refrigerated space?
• Latent heat of Condensation is associated with which phase change?
• Which ratio would be incorrect when describing the standard three compressor types' compression ratios?
• Where should ammonia detectors and alarms be integrated with the building’s ventilation system?
• Which is the correct ratio for a screw compressor among the following options?
• The speed at which air exits a fan is measured in which unit?
• The force exerted by trapped liquid refrigerants as its temperature increases is known as?
• In NFPA 704 hazard identification, which color represents health hazard?
• What is the heat energy that causes a change in state and cannot be measured with a thermometer?
• What are the four basic refrigeration components?
• As the temperature difference increases, the rate of heat flow____
• Which component rejects heat to the surroundings and condenses refrigerant?
• What is the role of the condenser in an ammonia system?
• The condition where a liquid exists at a lower temperature than its saturation temperature is called what?
• Which PSM element is primarily concerned with documenting the chemical properties and process information?
• How should contractors be managed in an ammonia facility?
• Which of the following lists the three primary methods of heat transfer?
• The pressure of trapped ammonia liquid increases when temperature rises; this is described as?
• If a substance undergoes a phase change without a rise in temperature, the energy involved is called?
• A measure of the intensity of heat energy in an object is?
• Current flow of how many milliamps can be painful, cause muscular paralysis, and breathing difficulties?
• Hydrostatic testing of ammonia piping serves to:
• Which compression ratio is associated with a high speed reciprocating compressor?
• Which of the following is the compression ratio for a rotary vane compressor?
• What are the four individual sections of the fire diamond?
• Which term gives detailed safety information about the chemicals used so employees can select the correct PPE?
• Which physical quantity is defined as force per unit area?
• Which option best represents a gauge pressure unit?
• How does a direct expansion (DX) evaporator operate?
• Which color on the NFPA 704 fire diamond indicates special notice?
• What is the compression ratio for a screw compressor?
• Which equipment rating is commonly used for ammonia facilities in hazardous locations?
• Which organization defines the IDLH value for ammonia that is used in professional standards?
• Why are incident investigations required under PSM?
• Which of the following is a major element of OSHA's PSM standard?
• What accepts the vapor from the evaporator by controlling the suction pressure and compresses the refrigerant to discharge it to the condenser?
• What strategy helps prevent frost buildup on evaporator coils?
• The process of achieving or maintaining the temperature of a space or object below that of the surrounding area by removing heat is?
• Which term describes a process that can ignite flammable material or pose a fire hazard regardless of presence of flammable material in the workspace?
• Among the following, which ratio correctly matches a rotary vane compressor?
• Materials that are poor conductors of heat and reduce the rate of heat energy conduction are called?
• What is the purpose of maintenance records in ammonia operations?
• Which statement about Process Hazard Analysis (PHA) is NOT true?
• As an arc flash fault continues, the arc flash explosion expansion is estimated to be how large?
• What are the two most common ammonia refrigeration compressors?
• Which term describes the documented information about a chemical's hazards, first aid measures, and PPE recommendations?
• Non-condensable gas in the condenser causes which effect?
• Which of the following is an example of a confined space in refrigeration systems?
• How does a rupture disk differ from a relief valve?
• Permissible Exposure Limit (PEL) for ammonia is?
• Which color on the NFPA 704 fire diamond indicates instability/ Reactivity?
• The rapid release of energy due to an arcing fault between conductors is called what?
• Why isn't ammonia odor alone sufficient for leak detection?
• What is the recommended action if a leak is detected in an occupied building?
• Which term describes ensuring only vapor enters the compressor in an ammonia system?
• During an arc flash event, what is the conductor?
• Which ratio corresponds to a high speed reciprocating compressor?
• What must occur before implementing a change under Management of Change (MOC)?
• Direct current voltage as low as how many volts has been known to cause fatalities?
• Heat energy during the change of state from vapor to liquid is called what?
• Which sequence best represents the recommended response to a leak in an occupied building?
• Lower Explosive Limit (LEL) is what percentage?
• Which statement about rupture disks is accurate?
• Which option best describes how ammonia detectors integrated with ventilation should respond to a detected release?
• What is the IDLH value for ammonia?
• Which elements are typically evaluated in an ammonia emergency drill?
• Current flow as low as how many milliamps can produce a physical sensation?
• Which of the following is NOT a typical compression ratio for any of the three specified compressor types?
• During maintenance, what safety measure involves applying physical locks to equipment to prevent restart?
• Which statement about oil management is true?
• Which standard is used for the identification of hazard of materials for emergency response?
• What device protects the system from overpressure?
• What is the purpose of a pre-commissioning check?
• What is the purpose of a filter-dryer in an ammonia refrigeration system?
• Why is good oil management important in ammonia systems?
• Which color on the NFPA 704 fire diamond indicates flammability?
• The direct change of state from vapor to liquid is called?
• Which statement about the Upper Explosive Limit (UEL) is true?
• What is a primary outcome of incident investigations required by PSM?
• What does the abbreviation CFM stand for?
• The temperature at which a liquid is ready to begin changing phase at a given pressure is called what?
• A space with limited entry and egress and not suitable for human inhabitants is called what?
• How can ammonia leaks be detected?
• Why is ammonia considered a toxic hazard in enclosed spaces?
• The direct change of state from vapor to solid is referred to as what?
• Which statement correctly describes the condenser's function?
• A rotary vane compressor typically operates at what compression ratio?
• A safety procedure used to ensure dangerous machines are shut off and cannot be restarted during maintenance is called what?
• Which term describes a hazardous electrical event characterized by a high-energy arc between conductors?
• Heat transfer by electromagnetic waves is known as?
• Latent heat of Vaporization is associated with which phase change?
• What is the role of an oil separator in an ammonia refrigeration system?
• What is hydrostatic testing used for in ammonia piping?
• Which statement about flooded evaporators is incorrect?
• How many BTUs are required to change one pound of water at 212 F to a vapor?
• Which term describes a space with limited means of entry and exit not intended for human occupancy?
• APR cannot be used where a concentration is greater than that defined as immediately dangerous to life and health (IDLH).
• Which of the following is a plausible cause of low suction pressure?
• What is the primary purpose of OSHA's Process Safety Management (PSM) standard in ammonia refrigeration facilities?
• What should be included in an ammonia emergency drill?
• What is the purpose of a sight glass in a receiver?
• Which device can be used as a backup to the safety relief valve in ammonia systems?
• In ammonia spaces, proper ventilation primarily serves to
• The general accepted rule of thumb is never fill a vessel more than?
• Which of the following is a common cause of high head pressure in ammonia systems?