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COMPRESSORS EXAM BUDLE 2024

Exam (elaborations) Ch 5. Compressors Questions and Answers Exam (elaborations) Chapter 7 compressors Questions and Answers Exam (elaborations) Refrigeration Compressors Questions and Answers Exam (elaborations) unit 13 Questions and Answers Exam (elaborations) Air compressor test Question...

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Compressors Questions and Answers

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Compressors Questions and Answers What are the 2 types of positive displacement compressors? Reciprocating, rotary where is the reciprocating compressor mainly used? residential and commercial A.c where is the rotary compressors mainly used? small refrigeration and large industrial...

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Chapter 2: Compressors Questions and Answers

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Chapter 2: Compressors Questions and Answers reciprocating compressor A compressor that uses a piston to reduce refrigerant volume within a cylinder. hermetic compressor A compressor sealed in a housing with the compressor motor. semi-hermetic compressor A compressor that is locate...

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Compressors Questions and Answers Graded A+

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Compressors Questions and Answers Graded A+ What does the compressor do The compressors is a vapor pump that pumps refrigerant in the form of heat laden. It increases the pressure from the suction pressure level to the discharge pressure level Name all the different types of compressors ro...

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Compressors Questions with correct Answers

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Compressors Questions with correct Answers True of False: gas volume, temperature, and pressure are related. True, reducing volume can increase in both pressure and temperature What does the type of compressor depend on? the application What are the application factors? Applicatio...

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Compressors Questions and Solutions

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Compressors Questions and Solutions What is the most common type of positive displacement compressors? Reciprocating compressors Which compressor accelerates gas to give it energy? Centrifugal compressors Discharge rate and flow rate are the typical compressor rating? True W...

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Compressor Review Questions and Answers

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Compressor Review Questions and Answers what is a closed system called that allows no heat in or out adiabatic what do the letters FAD stand for free air delivery for a reciprocating compressor, what is the entire volume expelled by the piston called delivery/ induced volume ...

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Compressors Questions and Answers 2024

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Compressors Questions and Answers 2024 Positive Displacement increases the pressure of the refrigerant by physically decreasing the volume of the container that is holding the refrigerant. Function of a compressor Compressors are vapour pumps. Responsible for lowering the pressure on the s...

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Compressors Questions and Answers

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Compressors Questions and Answers what is the only thing all compressors must pump vapor list the major types of compressors by mechanical design reciprocating rotary scroll screw centrifugal explain the difference between a positive displacement compressor and a nonpositive dis...

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Compressor Questions with correct Answers

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Compressor Questions with correct Answers What does the internal overload of a compressor sense? heat of the windings Where is oiling required on a centrifugal refrigeration system? at the shaft end bearings Which type of compressor can be used with a steam turbine as a prime mover?...

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Unit 23 Compressors Questions and Answers

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Unit 23 Compressors Questions and Answers Describe the operation of a compressor It lifts the low pressure gas from the suction side of the system to the discharge side of the system = vapor pump Name five types of compressors Rotary Vane, Scroll, Centrifugal, Reciprocating , Screw ...

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Compressors--quiz review Questions and Answers

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Compressors--quiz review Questions and Answers 1. The most common type of positive displacement compressor is the ? Reciprocating compressor 2. ___________Compressors accelerate a gas to give it energy. The energy is then converted to pressure when the gas is slowed down in a controlled man...

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Air compressors Questions and Answers

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Air compressors Questions and Answers compressor duty cycle is how long a compressor must rest after a certain operating time the relationship between pressure, temperature, and volume can be described by Ideal Gas Law most compressed air safety relief valves are sealed with a lead...

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Hvac compressor flashcards Questions and Answers

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Hvac compressor flashcards Questions and Answers The low side of the refrigerated system includes Evaporator suction line and suction input of compressor Head pressure refers to the High side of the system A compressor with a piston that travels back and forth in a cylinder is what ...

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COMPRESSORS QUESTIONS AND ANSWERS

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COMPRESSORS QUESTIONS AND ANSWERS 2 Types of Compressor Dynamic and Positive Displacement Working principle: Dynamic -wheel turns -speed of ball increases -air is discharged through a diffuser where kinetic energy is transformed into pressure Positive displacement compressor -has...

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Compressors Questions and Answers

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Compressors Questions and Answers Compressor valves are opened by the reciprocating action of the piston a. true b. false b. false the pressure differential operates the valves Leaking suction valves can result in increased discharge valve temperature a. true b. false a List the...

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Unit 2- Chapter 3- Introduction to Compressors Questions and Answers

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Unit 2- Chapter 3- Introduction to Compressors Questions and Answers What 4 variable does a compressor focus on managing? Volume, Pressure, Heat, Velocity What are the two compressor classifications? Positive Displacement and Dynamic compressors Positive Displacement compressor Dra...

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Compressors Questions and Answers

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Compressors Questions and Answers Pulsation chamber A short pipe in the discharge line of a compressor at that is larger in diameter than the largest suction piping to the compressor Centripetal and screw compressors Used in large commercial and industrial refrigeration systems Reci...

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Compressor Types Questions with correct Solutions

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Compressor Types Questions with correct Solutions What are the 5 types of compressors? Screw, centrifugal, reciprocating, scroll, and rotary. When is a screw compressor used? On a large chilled water and refrigeration system, available in 20 tons and up, uses a pair of special helical roto...

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Unit 13, COMPRESSURES QUESTIONS AND ANSWERS

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Unit 13, COMPRESSURES QUESTIONS AND ANSWERS Condenser The part of the refrigeration system that receives the high pressure superheated vapor from the compressor and extracts the heat in vapor reducing it to a high pressure saturated liquid. Scaling The formation of lime and other deposits ...

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Compressor Questions and Answers

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Compressor Questions and Answers what are the types of compressors? Reciprocating Rotary Scroll Screw Centrifugal Compresses what? low temp, low pressure refrigerant vapor After compressor compresses, what happens? Temperature of refrigerant rises, and pressure increases ...

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HVAC Compressors Questions and Answers

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HVAC Compressors Questions and Answers Burnout a condition in which the breakdown of the motor winding insulation causes the motor to short out. Floodback is a condition when refrigerant returning to the compressor is in the liquid state and continuously happening. Short cycling is...

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HVAC Compressors Questions and Answers

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HVAC Compressors Questions and Answers The low side of the refrigeration system includes: The Evaporator, Suction Line and Suction input of the Compressor Head pressure refers to the pressure in the: High side of the system A compressor with a piston that travels back and forth in a...

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Refrigeration compressors Questions and Answers

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Refrigeration compressors Questions and Answers Which of the following is NOT a function of the compressor in a refrigeration system a) draw low pressure refrigerant out of the evaporator b) draw low temperature refrigerant out of the vaporizer c) lower the temperature of the refrigerant d) mai...

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Air Compressors Questions and Answers

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Air Compressors Questions and Answers An air compressor is equpiied with an intercooler and after cooler to... increase compressor efficieny and economy Aftercoolers are used with air compressors to... reduce the temperature of compressed air Condensate must be drained from the in...

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Compressor rotor verbal Questions with correct Answers

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Compressor rotor verbal Questions with correct Answers Primary function of compressor To supply a sufficient quantity of air to the combustion burners What must compressor do to fulfill its function? Compressor must increase the pressure of the mass of air received from the air inlet duct ...

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HVACR Unit 13 – Compressors Questions and Answers

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HVACR Unit 13 – Compressors Questions and Answers List the major types of compressors by mechanical design. Rotary, reciprocating, scroll, screw, centrifugal Explain the difference between a positive-displacement compressor and nonpositive-displacement compressor. Positive displacement -...

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CH 18 Compressors Questions and Answers

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CH 18 Compressors Questions and Answers What is an open drive compressor? Compressor driven by an external motor. A compressor that has an integrated drive motor in a sealed unit it call ______. Hermetic compressor What is a major concern with all open drive compressors? Keeping th...

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CHAPTER 6 AIR COMPRESSORS QUESTIONS AND ANSWERS

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CHAPTER 6 AIR COMPRESSORS QUESTIONS AND ANSWERS Three types of air compressors a. Reciprocating b. Rotary c. Centrifugal Rotary compressors Rotary compressors are driven by a direct drive that rotates a mechanism (impellers, vanes, or lobes) that compresses the air being pumped. The actu...

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Compressors Questions and Answers

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Compressors Questions and Answers Rotary Compressor size = 5 tons or less Scroll Compressor size = 1.5 to 70 tons Screw Compressor size = 50 to 750 tons Centrifugal Compressor size = 100 to over 10,000 tons below The drive motor for a hermetic reciprocating compress...

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Unit 23 Test and Quiz Review Questions and Answers

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Unit 23 Test and Quiz Review Questions and Answers The compressor increases the pressure in the system from the low-side pressure to the high-side pressure. Which of the following best describes the function of a compressor? The compressor restricts the flow of refrigerant that enters the evapo...

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Centrifugal Compressors Questions and Answers

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Centrifugal Compressors Questions and Answers The part of a centrifugal compressor that adds velocity energy to a gas is the Impeller Velocity is converted into pressure in the Defuser Volute The actual cubic feet per minute that a compressor moves must be measured at the suction ...

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Compressors Questions and Answers

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Compressors Questions and Answers Mechanical compressors require clean Oil and liquid-free vapor Accumulator protects a compressor from liquid slugging Thermal overload Switch that opens the power circuit to turn off the compressor crank case pressure regulator (CPR) Valve ...

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Compressors Multiple Choice Questions and Answers

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Compressors Multiple Choice Questions and Answers Which type of screw compressor is typically used in ammonia or other high-pressure systems? Open-drive 3 multiple choice options Which of the following explains why exhaust valves present more problems than intake valves? All of the above ...

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M3 Air Compressors Questions and Answers

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M3 Air Compressors Questions and Answers In a two-stage compressor, the intercooler Removes the heat of compression from air leaving the first stage The Ideal Gass Law requires that temperature be stated Absolute Units One factor that is not considered in selecting a compressor is ...

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Chapter 5: Compressors Questions and Answers

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Chapter 5: Compressors Questions and Answers Which of the following best describes the state of the refrigerant at the inlet and outlet of the compressor? (A) Low pressure liquid in, low pressure liquid out (B) Low pressure vapor in, high pressure liquid out (C) Low pressure vapor in, high pre...

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15.4 Engine Compressors. Questions and Answers

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15.4 Engine Compressors. Questions and Answers 1. A bypass engine LP compressor. A. supplies less air than is required for combustion. B. supplies more air than is required for combustion. C. supplies only the required quantity for combustion. Ans.- supplies more air than is required for combus...

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PE 4B 75 Air Compressors

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PE 4B 75 Air Compressors A compressor which would favour vol over press would be the ______ compressor. A) rotary lobe B) screw C) axial D) centrifugal E) sliding vane Centrifugal compressor Compressor unloaders: A) could close discharge valve B) must be used on centrifugal compressors ...

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PE 4B1 Chapter 75 Air Compressors Questions and Answers

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PE 4B1 Chapter 75 Air Compressors Questions and Answers A type of air compressor which draws in a charge of air, traps it, reduces its volume and then discharges it is ______________. A. A single acting compressor B. A positive displacement compressor C. A dynamic compressor D. An axial compres...

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troubleshooting compressors Questions and Answers

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troubleshooting compressors Questions and Answers The higher the pressure the larger the volume False Liquids compress as easily as vapors or gases false compressed gases will resume what percent when released 100 percent as temperature increases the visocosity does what in...

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Quiz 5_Ch. 5 - Compressors PTAC-1410 Questions and Answers

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Quiz 5_Ch. 5 - Compressors PTAC-1410 Questions and Answers If the desired final pressure for a 4-stage compressor with a 3.2 compression ratio is 1500 psi, what is the pressure on the 3rd stage? 481.7 psia Liquids are considered to be _______________. non-compressible The most commo...

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Unit 23: Compressors Questions and Answers

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Unit 23: Compressors Questions and Answers Which of the following best describes the function of a compressor? The compressor increases the pressure in the system from the low-side pressure to the high-side pressure. Five types of compressors are _____________. reciprocating, rotary, scrol...

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Unit 23- compressors Questions and Answers Graded A+

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Unit 23- compressors Questions and Answers Graded A+ Which of the following compressors can operate normally when the electric motor is operating in a clockwise or counter clockwise motion? Reciprocating compressor Most of the heat absorbed by the suction gas is: Latent heat Which o...

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Air Compressor QUIZ Questions and Answers

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Air Compressor QUIZ Questions and Answers crankshaft in a reciprocating piston air compressor, the ___ rotates to compress the air similarily to an internal combustion engine spring safety relief valve is essentially a check valve w/ an adjustable ___. circuit breaker which of the ...

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Unit 13 Questions and Answers

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Unit 13 Questions and Answers Which compressor is not considered a positive displacement compressor? Centrifugal What is the lowest percentage of full capacity that a digital scroll can be safely operated for extended periods? The minimum capacity is 10% to insure that the compressor gets ...

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why compressor fail Questions and Answers

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why compressor fail Questions and Answers when symptoms are treated as they cause of a compressor failure, the real cause remains undetected into a repeat failure occurs. true improper maintenance leading to obstructed airflow through the heat exchangers can cause major system components to...

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Chapter 5 review questions and Answers

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Chapter 5 review questions and Answers List the two purposes for which industrial manufacturers use compressors. Transfer granular powders and small plastic pellets from place to place. List four gases that compressors are used to compress. Light hydrocarbons, Nitrogen, Hydrogen, Carbine d...

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Air Compression Questions and Answers

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Air Compression Questions and Answers Compressed air tools tend to be more expensive than electrical tools Air receivers must have a safety valve An air compressor which gives two compression strokes per crankshaft revolution is single cylinder double acting Moisture in a pr...

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75-Pump Operation and Maintenance

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75-Pump Operation and Maintenance Questions and Answers Positive displacement compressors: a) cannot deliver pulsation-free air b) cannot deliver oil-free air c) must have suction and discharge valves d) must use all internal lubrication e) could be single stage with three cylinders E ...

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Carol_23_compressors Questions and Answers

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Carol_23_compressors Questions and Answers Top Dead Center When the piston reaches the top of its compression stroke, it is called Because a scroll compressor's has fewer moving parts, it operates much quieter than other compressor designs and technologies. Due to the small number of mo...

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Compressors - Basic Types & Operations Questions and Answers

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Compressors - Basic Types & Operations Questions and Answers are the four factors that determines compressor capacity. Cylinder diameter Length of the piston stroke Number of cylinders Speed Gas is displaced with a rotary motion in a: Rotary compressor. Reciprocating compressor. R...

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Unit 2 - Pumps and Compressors Questions and Answers

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Unit 2 - Pumps and Compressors Questions and Answers When a pump discharges into a vessel operating at 300 kPa, the 300 kPa is referred to as: A)Dynamic head B)Discharge head C)Total head D)Friction head E)Pressure head Pressure head A high pressure pump is the: A)Centrifugal B)V...

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Compressor Questions and Answers

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Compressor Questions and Answers which of the following best describes the function of a compressor a compressor increases the pressure in the system full of the low side pressure to the high side pressure what are the five types of compressors reciprocating, rotary, scroll, screw, binary ...

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compressor & condensors Questions and Answers

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compressor & condensors Questions and Answers the compressor is considered the ______ of the refrigeration system? the heart compressor pumps what? vapor suction gas from the evaporator enters the? compressor refrigerant is discharged from the compressor to the? condenser ...

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CH 8 - CH 9 (Compressors) Questions and Answers

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CH 8 - CH 9 (Compressors) Questions and Answers ____ of a compressor is known as free air delivered or free air capacity. a. capacity d. displacement c. absolute pressure d. efficiency e. pressure ratio a. capacity Reciprocating compressors are suitable for _____. a. low pressure ...

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Unit 13 review Questions and Answers

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Unit 13 review Questions and Answers What is the only thing all compressors must pump? Vapor List the major types of compressors by mechanical design. Reciprocating, rotary, scroll, screw, centrifugal Explain the difference between a positive displacement compressor and a non- posit...

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Chapter 8 Questions and Answers

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Chapter 8 Questions and Answers __________ of a compressor is known as free air delivered or free air capacity. a. Capacity b. Displacement c. Absolute pressure d. Efficiency e. Pressure ratio A Reciprocating compressors are suitable for_________________. a. low pressure service ...

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Air Compressors (Part I) Questions and Answers

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Air Compressors (Part I) Questions and Answers The running unloader of the device shown in the illustration operates by ______. See illustration GS-0119. a) temporarily discharging the compressed air to the atmosphere b) holding open the high pressure stage reed-type suction valves c) throttling...

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Air compressors Questions and Answers

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Air compressors Questions and Answers If the intercooler relief valve lifts while an air compressor is operating under load, you should check for ___. a. a defective pressure switch or pilot valve b. a leak in the intercooler piping c. leakage through the low pressure unloader control diaphrag...

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Unit 23 Compressors Questions and Answers

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Unit 23 Compressors Questions and Answers 1. If the compression ratio of a system with a reciprocating compressor decreases, the amount of refrigerant pumped by the compressor ____. will increase 2. Most of the heat energy in the suction vapor entering the compressor is ____. Superheated f...

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Chapter 5 Compressors Questions and Answers

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Chapter 5 Compressors Questions and Answers Compressors are used in a variety of applications. Plastics facility Where are compressors used to transfer granular powders and small plastic pellets ? Natural gas plants Where are compressors used to establish feed gas process pressures...

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Compressor Theory & Design Module Questions and Answers

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Compressor Theory & Design Module Questions and Answers . A single cylinder compressor with a high compression ratio results in: 1. Low discharge temperature. 2. Low volumetric efficiency. 3. High discharge temperature. 4. High volumetric efficiency. 5. A corresponding reduction in speed of t...

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Compressors Questions and Answers

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Compressors Questions and Answers if an open belt drive compressor has a compressor pulley larger then the motor pulley, the compressor will turn _______ then the motor A) slower page 339 19th edition B) faster C) at the same rate D) wont turn at all What is the largest amount of horsepo...

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Centrifugal compressor Basics Questions and Answers

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Centrifugal compressor Basics Questions and Answers 2 types of casing arrangements and their advantages Horizontally split casing- less expensive Vertically split casing- higher pressure applications, especially in H2 services Compressor curve -shows the relationship between the compresso...

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Process Equipment Chapter 6 Compressors Questions and Answers

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Process Equipment Chapter 6 Compressors Questions and Answers 1. Compressors are commonly used with fluids. True or False False 2. The main purpose of compressors is to increase the pressure of gases. True or False True 3. One of the main purposes of a compressor is to increase ___...

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Unit 23 Compressors Questions and answers

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Unit 23 Compressors Questions and answers Compressors are not designed to compress liquids because pumps already exist for that purpose. False The compressor in the mechanical refrigeration system is much like the heart in the human body. True At a constant RPM, a compressor is a co...

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Air Compressors (Advanced Systems Binder) Questions and Answers

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Air Compressors (Advanced Systems Binder) Questions and Answers How do air compressors primarily impart energy into air? By packing a given mass of air into a smaller space, raising its pressure. When air is allowed to escape from pressure, its energy is released Air compressors are divi...

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Unit 23 Compressors exam Questions and Answers

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Unit 23 Compressors exam Questions and Answers If the compression ratio of a system with a reciprocating compressor decreases, the amount of refrigerant pumped by the compressor ____. a. will increase b. will decrease c. will remain the same d. cannot be determined Answer : A If the s...

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Centrifugal Compressors Questions and Answers

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Centrifugal Compressors Questions and Answers Centrifugal Compressor Has impeller with radial blades and a volute casing. As the rotor spins, it flings refrigerant vapor outward, where it compresses against volute casing. (#19 page 356 and 1402) What regulates amount of vapor flowing into i...

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Air Compression questions and Answers

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Air Compression questions and Answers Compressed air machinery would most likely be used in: a. Coal mines b. Residential garages c. Home furnace control systems d. Agricultural applications e. Tool and die shops. A Where pistons move in a cylinder, it is necessary for the lubricant to...

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Quiz 23 Questions and answers

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Quiz 23 Questions and answers If the compression ratio of a system with a reciprocating compressor decreases, the amount of refrigerant pumped by the compressor______? will increase Liquid entering the compression chamber of a reciprocating compressor can lead to_____? both a and b ...

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Positive Displacement Compressors Review Sheet Questions and Answers

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Positive Displacement Compressors Review Sheet Questions and Answers At point A, where is the piston in relation to the P-V Diagram? Fully Extended (Discharging into the system) At point B, where is the piston in relation to the P-V Diagram? a. Suction Valve opens. At points B to C,...

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A/C Compressor Questions and Answers

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A/C Compressor Questions and Answers A/C Compressor The engine drives the compressor with a belt. In action, the compressor takes the low pressure refrigerant from the evaporator and compresses it according to speed and air temperature. The inlet side is known as the low (pressure) side and the ou...

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Air Compressors Questions and Answers

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Air Compressors Questions and Answers Compressed air can account for _ percent or more of a company's electrical costs. 10 Compressed air Stored energy that, when released, provides power to make things work What determines the size of the air compressor needed to do the job? Volu...

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Chapter 23 Compressors Questions and Answers

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Chapter 23 Compressors Questions and Answers What is the function of the compressor? Are vapor pumps. Lowers pressure on the suction side Increases pressure on the is charge side. Suction gas from the evaporator enters the compressor then refrigerant is discharged to the condenser. What ...

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A35 Air Compressor Questions and Answers

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A35 Air Compressor Questions and Answers Unloading Valve Allows the air to escape from the compression chamber when there is a strain on the electrical motor. Reciprocating Air Compressor The most commonly used air compressor. Electric motor The most common power source for an air ...

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Chapter 5 – Compressors Questions and answers

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Chapter 5 – Compressors Questions and answers Compressor Applications and Classification In general, compressors move gases Compressors also: Plastic Industries transfer granular powders and small plastic pellets Natural gas plants establish feed gas process pressures ...

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Air compressor test Questions and Answers

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Air compressor test Questions and Answers Air compressors are used to To power construction tools and industrial equipment A compressor C of F is required for air compressors at what pressure Above 100 psi An air compressor takes compressed air and forces it into a container under p...

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unit 13 Questions and Answers

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unit 13 Questions and Answers 1. Which of the following compressors is not considered a positive displacement compressor? Centrifugal 2. Hydraulic pressures will develop and break compressor parts if Liquid refrigerant enters the compressor cylinders 3. A compressor crankcase heate...

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Refrigeration Compressors Questions and Answers

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Refrigeration Compressors Questions and Answers Double trunk pistons are used in some refrigeration compressors to reduce oil foaming in the crankcase by what means? A) Increasing compressor volumetric efficiency B) Producing higher compression pressures C) Minimizing free contact between refr...

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Chapter 7 compressors Questions and Answers

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Chapter 7 compressors Questions and Answers 1. What are the two primary functions of a refrigeration compressor? To lower the pressure and temperature in the evaporator, and raise the pressure and temperature on the condenser side of the system 2. Which type of compressor is most popular in...

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Ch 5. Compressors Questions and Answers

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Ch 5. Compressors Questions and Answers Which of the following best describes the state of the refrigerant at the inlet and outlet of the compressor? A) Low pressure liquid in, low pressure liquid out B) Low pressure vapor in, High pressure liquid out C) Low pressure vapor in, High pressure vapo...

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