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RETA Industrial Refrigeration Book 1 Exam (2025 Revision) Accurate Exam | Questions and 100% Verified Answers | 2025-2026 As defined in Chapter one of this text, the primary purpose of a refrigeration system it to? (pg. 1-3) A) To freeze food B) To cool buildings C) To preserve food D) To maintain a temperature Operators must keep refrigeration systems operating safely and efficiently. Which of the following best describes the areas of required knowledge for this to be possible? (pg. 1-4) A) Basic physical principles, interpretation of information from temperature and pressure gauges, basic operating principles D) To maintain a temperature A) Basic physical principles, interpretation of information from temperature andpressure gauges, basic operating principles B) Basic physical principles, interpretation of information from temperature and pressure gauges, manufacturer of the equipment C) Interpretation of information from temperature and pressure gauges, basic operating principles, company quality control policies and procedures D) Interpretation of information from temperature and pressure gauges, manufacturer of the equipment, company quality control policies and procedures Mechanical refrigeration is a series of steps that? (pg. 1-2) A) Moves heat energy from a space or object to an area where it can do no harm B) Adds cold to a space or object A) Moves heat energy from a space orobject to an area where it can do no harm Sensible heat? (pg. 1-22) A) Is measured using a pressure gauge B) Is always between 32°F and 212°F D) Is heat energy that causes a C) Is heat energy that causes a changein temperature but does not change of state but does not cause a EEL SERIE 2 SEE change in temperature D) Is heat energy that causes a change in temperature but does not cause a change of state Latent heat? (pg. 1-22) A) Is measured using a pressure gauge C) Is heat energy that causes a BE anOe eoneed pyucingia change of state but does not cause a thermometer P change in temperature C) Is heat energy that causes a change of state but does not cause a change in temperature D) Is heat energy that causes a change in temperature but does not cause a change of state Which of the answers below is an example of heat transfer by convection? (pg. 1-36) A) The Sun's rays B) A rod that is heat on one end resulting in a temperature change at the other end C) Warm air moving over an object D) Heat transferred to a pan setting on an electric hot plate How does the refrigeration technician/operator know what the conditions are within a refrigeration system? (pg. 1-4) A) By using his knowledge of system basic operating principles to evaluate temperature and pressure readings C) Warm air moving over an object A) By using his knowledge of system basic operating principles to evaluate temperature and pressure readings Which of the following is used to measure the quantity of heat energy? (pg. 1-21) A) British Thermal Units (BTUs) or Calories A) British Thermal Units (BTUs) or Calories B) Pascals and Kilopascals C) Degrees Kelvin D) Degrees Celsius or Fahrenheit Which of the following are used in heat calculations? (pg. 1-40A) Mass, sensible heat, temperature, specific heat B) Mass, latent heat, temperature, _ B) Mass, latent heat, temperature, specific heat . specific heat C) Mass, sensible heat, heat of cooling,change of state D) Mass, latent heat, temperature, heatof refrigeration Latent heat of vaporization? (pg. 1- 22) A) ls calculated using temperature B) Is always going to raise the : C) Is the heat energy required to temperature of the liquid it is trying to _. on causea liquid to become a vapor fe) C) Is the heat energy required to cause a liquid to become a vapor D) Is the same for all liquids Pressure is a measure of? (pg. 1-11) A) The action seen from the attraction ofgravity B) Weight ; ; ; C) The relationship of a force being C) The relationship of a force being applied over a given area applied over a given area D) The distance between the top of the piston and the discharge valve of a reciprocating compressor more heat energy to increase temperature . A) ls greater as the substance C) Is 1 BTU/Ib/degree Fahrenheit for requiresmore heat energy to all substances increase temperature D) Is related to change of state, not temperature change of a substance Temperature is a measure of? (pg. 1-18) A) The latent heat of an object B) Heat of fusion that has been D) The intensity of the heat energy in absorbedby an object anobject C) Heat of vaporization D) The intensity of the heat energy in an object If the force acting on an area of 5 square inches is 150 Ibs., what is the A) 30 Ib/in2 pressure on the area? (pg. 1-11)A) 30 Ib/in2B) 750 Ib/in2C) 155 Ib/in2D) 3750 Ib/in2 Using the vapor pressure curve for ammonia, 70°F equals approximately? (pg. 1-33)A) 38 D) 114 psig PSIGB) 40 PSIGC) 70 PSIGD) 114 PSIG Thirty-two PSIA equals? (pg. 1-15)A) 46.7 PSIGB) 17.3 PSIGC) 3.2 in. B) 17.3 psig HgD) 760 mm Hg The pressure midway between 0 PSIA and 0 PSIG is? (pg. 1-17)A) A) 7.35 PSIA 7.35 PSIAB) 7.35 PSIG C) 7.35 in. HgD) 0 in. Hg Which of the answers below is an example of heat transfer by B) A rod heated on one end conduction? (pg. 1-35)A) The becomingwarm at the other end sun's raysB) A rod heated on one superheatedC) SubcooledD) Saturated A gallon of milk weights 8 pounds. If it leaves the cow at 90°F and must be cooled to 35°F, how many BTUs must be removed in the cooling process? (pg. 1-40)A) 409 BTUsB) 40.9 BTUsC) 440 BTUsD) 51.15 BTUs A meat plant process 100 animals a day with an average processed weight of 750 pounds of beef per animal. The meat must be cooled to 45°F from 85°F. How many BTUs must be removed in the cooling process? (pg. 1-40)A) 3,000,000 BTUsB) 2,205,000 BTUsC) 220,500 BTUsD) 55,125 BTUs Q=M-x Cp x Change in Temp. Q = 8 x 0.93 x 55 = 409 BTUs A) 409 BTUs Q=M-x Cp x Change in Temp.Q = (100 animals x 750lbs. x 0.735 x (85 - 45) = 2,205,000 BTUsB) 2,205,000 BTUs A vapor can NOT be? (pg. 1-30) A) Compressed B) SuperheatedC) SubcooledD) Saturated What kind of a measure is a ton of refrigeration? (pg. 1-39)A) An amount in poundsB) A rate of heat transfer in BTUs per unitof timeC) A quantity in BTUsD) A measure of energy in BTUs perpound How many degrees Fahrenheit is equal to -6.7 degrees Celsius? (pg. 1-19)A) 32°FB) 20°FC) -20°FD) - (aR The condition of a liquid that exists at a temperature below its boiling point is? (pg. 2-12)A) SuperheatedB) SubcooledC) SaturatedD) Permeated C) Subcooled B) A rate of heat transfer in BTUs per unitof time Fahrenheit = (9 x Celsius) / 5) + 32 Fahrenheit = (9 x -6.7)/5) + 32 = 20 B) 20°F B) Subcooled differentscales and therefore cannot be compared in this way Flash gas is? (pg. 2-2)A) Only the gas created at the expansion deviceB) The gas used to defrost evaporators that use gas defrost systems C) The gas created anytime liquid refrigerant evaporatesD) A flammable refrigerant gas Which of the answers below is an example of a pressure drop? (pg. 2- 21)A) The difference in pressure due to refrigerant "dropping" in a vertical pipe riserB) In a compressor, the difference inpressure when the piston is at top deadcenter and bottom dead centerC) The loss of pressure as a fluid movesdown the A) Only the gas created at the expansiondevice C) The loss of pressure as a fluid movesdown the pipe due to the interaction ofthe fluid and the inner walls of the pipe pipe due to the interaction ofthe fluid and the inner walls of the pipeD) The change in pressure between thecondenser outlet and the high pressurereceiver Refrigerant absorbs the most heat when? (pg. 2-6)A) SuperheatedB) SubcooledC) Changing from liquid to vaporD) Changing from vapor to liquid The latent heat of condensation of a substance is exactly the same quantity as? (pg. 1-30)A) The latent heat of evaporation of asubstanceB) The latent heat of freezing of a substanceC) The specific heat of a substanceD) The heat required to sublimate thesubstance Saturated conditions exist? (pg. 2- 12)A) Only in a condenserB) Only in an evaporatorC) Only in liquid lines C) Changing from liquid to vapor A) The latent heat of evaporation of asubstance D) At some point within an evaporatorand a condenser A conventional mechanical refrigeration system is considered? (pg. 2-1)A) An : B) A closed loop system expendable refrigerant systemB) A closed loop systemC) An open loop systemD) A multi-loop system Superheat is found at which points of a typical system? (pg. 2-13)A) The compressor suction and the liquid lineB) The compressor ; : ; D) The compressor suction and suction and the high-pressure ; . . compressor discharge line receiver inletC) The condenser outlet (CD) line D) The compressor suction and compressor discharge line Which of the following is not a true statement about heat of compression? (pg. 2-14) A) It happens to all refrigerants in mechanical refrigeration systemsB) It is the energy that is applied to vaporby the compressor reducing the D) It improves the operating volumeC) It is one reason why a efficiency ofmost systems by condenser mustbe sized larger than improving condensingrate the evaporator loadD) It improves the operating efficiency ofmost systems by improving condensingrate In an operating ammonia refrigeration system, subcooled refrigerant can only be? (pg. 2-13)A) B) Liquid SolidB) LiquidC) VaporD) Combination of liquid and vapor Superheated refrigerant can only be? (pg. 2-14)A) SolidB) LiquidC) Be _ C) Vapor VaporD) Combination and liquid and vapor Saturated refrigerant can? (pg. 2- 12)A) Only be a liquidB) Only be a vaporC) Only be a combination of D) Be a liquid, vapor, or combination ofthe two 
