It is a device that looks like another heat exchanger and is place just behind the AC vent over a dash board of a car, an evaporator takes heat from the passenger’s compartment and convert the liquid refrigerant sent by the expansion valve into vapor, which in turn provides cooling through the fan inside a passenger’s cabin. It is the device looks like a small radiator and is used after the compressor as it provides condensing i.e. Anti-lock Braking System (ABS) – Working Principle, Main Components with Advantages and Disadvantages, How Automatic Transmission Works? (adsbygoogle = window.adsbygoogle || []).push({}); PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. To install one of these units, you need the space to make a slot in the wall, and there should also be some open space behind the wall. Now the refrigerant is having low temperature but the pressure of the liquid is almost the same. W ith the mercury expected to hit the mid-30s Centigrade once again in many parts, drivers will be taking full advantage of their car’s air-conditioning system. The evaporator which is the another heat exchanger used in AC takes heat from the passenger’s cabin which in turn converts the liquid refrigerant flowing through the evaporator into vapors which in turn provide cooling with the help of the blower fan. 2. It is necessary for a gas to give off heat to liquefy (condense). 5. Here are some things to consider: The age of your air conditioner. Blast Furnace: Introduction, Definition,…, What is Stirling Engine - Types, Main Parts, Working…. The car Air Conditioning system circulates the refrigerant under pressure through these five major components in a closed circuit. Now the refrigerant is in high pressure and high temperature liquid state. In an air conditioning system freezing must be avoided. 2. HVAC stands for heating, ventilation and air conditioning: A: True B: False. Here you will find the General Science Multiple Choice Questions Mcqs are from Biology, Chemistry, Physics and Atmospheric Studies. A: 10 to 15 percent B: 20 to 25 percent C: 30 to 35 percent D: 40 to 55 percent. 1. A. At these points in the system, the refrigerant undergoes preset pressure and temperature changes. The compressor at the heart of your air conditioning system requires energy in order to circulate cold air around the vehicle. Air Compression System Quiz; Air Compression System Quiz 2; HVAC Controls Quiz; EPA 608 Practice Tests; NATE Practice Tests; Oil and Gas Heating; HVAC Electrical Basics Test; EPA 609 Practice Tests; HVAC Journeyman IMC Code Practice Tests MCQ No - 1. Due to these problems, almost all the vehicle on the road today is equipped with an air conditioning system which now a days becomes the basic need for the human being.eval(ez_write_tag([[250,250],'mechanicalbooster_com-medrectangle-4','ezslot_14',620,'0','0']));eval(ez_write_tag([[250,250],'mechanicalbooster_com-medrectangle-4','ezslot_15',620,'0','1'])); The components of a car’s AC system is almost same as a room’s AC but there are lots of modification made in an automobile AC to make it compact and to fit it with engine’s component. Air Conditioning Controls:_____? The first step, as with many diagnostic steps with cars, is to start the car and turn the air con to full. Basically, the Car Air Conditioner has two different circuits. 3.) The components used in automobile AC are-. Replacing your air conditioner is an investment. The refrigeration system cool down the air which include many other parts like compressor,condenser etc. MCQs of Vapour Compression System. It serves one very fundamental purpose, as well, and that is to cool you down. But in a car it is required due to the following reasons. Compressor: The compressor is a pump driven by a belt attached to the engine's crankshaft. Mcq Added by: Muhammad Ullah. Your email address will not be published. 1.) 1. Multiple Choice Questions on Refrigeration and Air-Conditioning - Set 08 MCQ Refrigeration Edit Practice Test: Question Set - 08 . The Nash-Kelvinator corporation used its experience in refrigeration to introduce the automobile industry's first compact and affordable, single-unit heating and air conditioning system optional for its Nash models. When the refrigerant is drawn into the compressor, it is in a low-pressure gaseous form. The most efficient air conditioners on the market have SEER ratings of around 22. In a lithium bromide absorption refrigeration system (A) Lithium bromide … So this is how an automobile or car air conditioning system is used in a vehicle which makes the drive comforting and provides health safety to the passengers. As an automobile engineer we will define it as, an atmosphere that provides relax and causes less fatigue to a human which can be achieved by an air conditioning of the particular cabin that includes maintaining the cabin’s temperature between 20 to 25 degree centigrade and removing the humidity from the cabin’s atmosphere, in short by fitting air conditioner in that cabin but now the question arises How is it possible in a car’s cockpit? Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 MCQ Refrigeration Edit Practice Test: Question Set - 07. This vapor having high temperature low pressure is then sent to compressor which in turn increases the pressure over the vapors and converts the vapor refrigerant into liquid refrigerant. This high pressure high temperature liquid refrigerant is then sent to the condenser which lowers the temperature of this refrigerant by forced convection provided by the radiator fan or by separated fan used. It gets the energy from the engine so when the air conditioning system is turned on you will also be using more fuel. 3. D. All of The Above. Circulation of the Air That said, using the air con comes at a price too. Air Conditioning And Refrigeration is the electronic device where the temperature is maintained accordingly as per the need and relieves from the scorching heat. we respect your privacy and take protecting it seriously, What is Steam Condenser - Complete Explanation, What is Heat Exchanger? Next . 4. Your email address will not be published. Condenser – It is the device looks like a small radiator and is used after the compressor as it provides condensing i.e. Required fields are marked *. Note – Thermal expansion valve is used in vehicles that enable the passenger to change the temperature according to the requirement, by just adjusting the knob provided over a dash board in passenger’s cabin. The life of an air conditioner is somewhere between 10 and 20 years. - Complete Explanation, How Jet Engine Works? Easiest Explanation Ever, Valve Timing Diagram of Two Stroke and Four Stroke Engine. Find Local Help for Your AC & Air Conditioning Questions on HVAC.com Car Air Conditioning History . In the case of Tesla EVs, for example, the AC compressor is located at the front of the car and draws power from the Energy Storage System, or ESS, in the back. Now you just need to listen for any unusual noises coming from the air conditioning system. This high pressure and the low-temperature refrigerant is then sent to the expansion valve which in turn releases the pressure from the refrigerant and converts it into its original state. Pick up the wrong statement. 2. We’ll get the cold air blowing and show you the nice difference in auto repair. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. 1.2 Air-Conditioning Systems Depending on applications, there are several options / combinations of air conditioning, which are available for use: § Air conditioning (for space or machines) § Split air conditioners § Fan coil units in a larger system § Air handling units in a larger system 1.3 Refrigeration Systems (for processes) If you find this article informative and useful than don,t forget to share it. A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. MCQ No - 1. Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. 1. The reduced ambient air cooling system has (A) One cooling turbine and one heat exchanger (B) One cooling turbine and two heat exchangers This compressor works off 400 volts, directs refrigerant through to an independent chilling unit and then cools the air for dispersal through the vents and into the cabin. 2.) Let’s just find out.eval(ez_write_tag([[728,90],'mechanicalbooster_com-medrectangle-3','ezslot_6',619,'0','0'])); A car air conditioning system consists of a compact version of the components of the normal air conditioner that has an evaporator, compressor, condenser, expansion device, and a fan which are fitted in a car to provide air condition inside the passenger’s compartment. The most essential component of any air conditioning system is the compressor. Why Choose CNC Aluminum Over Other Metals For Prototyping? which will improve your skill. It is the heat sensitive fluid with very low boiling point that is used in AC as a medium of heat exchanging. The compressor of the car air conditioning system is driven by the crankshaft of the engine through the belt drive. Is the air … Everyday Science Mcqs Everyday Science Mcqs. What Companies In The Oil Industry Can Do To Enhance Worker Safety? Hey, In this animation I explain the basics of how a vehicles AC system works. – Best Explanation Ever, How Wind Power Plant Works?- Complete Explanation, A Detailed Guide on Ceramic Coating for Your Car, Top 5 Cheapest Cars in The World With Price And Mileage, A Simplified Guideline to Shopping for the Ideal 4WD Accessories. Your email address will not be published. In India during summers there is lots of hot and humid air in the atmosphere which causes difficulty for a driver to drive and also for the passengers to travel, so during summer, an effective air conditioning system is required in a car which can provide a cool and humid free environment inside a passenger’s compartment. This was the year Chrysler made big advances in their air-temp trunk mounted cooling system. Receiver dryer also provide filtering of the system by absorbing the contaminated foreign materials inside the AC system. The vapour compression refrigerator employs the following cycle (A) Rankine (B) Brayton ... Duct Design and Air Distribution; 11. Refrigeration and Air Conditioning Multiple Choice Questions :-1. Your email address will not be published. What to Know If You’re Planning to Buy a Car in 2021? PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. The air circulating system circulate this cooled air into the car which include blower, air duct etc.The controlling system used to control the temperature of the car by sensing it and control the refrigerating system. Ans: b. Circulation of the Air B. Humidity C. Temperature D. All of The Above. The higher the SEER rating, the more efficient the air conditioner. lowers the temperature, of the high pressure and high temperature liquid refrigerant sent by compressor through forced convection provided either by radiator fan or by separated fan used with condenser. 1) Windows Air-conditioning System Window air conditioners are one of the most commonly used and cheapest type of air conditioners. A. This refrigerant is then again sent to the evaporator for the further cycle. “Human comfort zone” how will you define it? Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. Air conditioning does not only condition the environment inside a passenger’s cabin but also provides filtered air which is very essential in cities like Delhi due to the very hazardous air pollution condition that can cause health issues to the passengers. Home » Refrigeration and Air Conditioning Objective type Questions and Answers » 95 TOP Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers List Sunday, 31 August 2014 It concerns automotive air-conditioning in particular because there, the freon hose operates in the engine compartment, tightly packed and bent, in high ambient temperature conditions, exposed to vibrations and in contact with car fluids. Who will provide power to the air conditioner in a car? The compressor of the car air conditioning system is driven by the crankshaft of the engine through the belt drive. MCQ of RAC (Refrigeration and air conditioning… The working of an automobile AC system is also almost same as the normal AC but little difference is there-. Why do We Need an Automobile or Car Air Conditioning System? 2. 1. 7 Skills Engineering Students Should Develop Today To Remain Relevant Tomorrow, How to Fix an Ignition Key That Doesn’t Turn. Otherwise component damage will occur. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. When a vehicle is running through cities like Delhi in India, passengers have to face lots of traffic that causes slow motion of vehicle due to which it is essential for a vehicle to be equipped with a system that can provide a comfort zone for the passengers. If you think your car’s air conditioning isn’t up to scratch, come visit your local auto repair experts at Christian Brothers Automotive in Buda, Texas, near Kyle. 1. Air-Conditioning Systems Comment document.getElementById("comment").setAttribute( "id", "a3543d7862935c82d7c2596e6a6e9dda" );document.getElementById("ebd2282172").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. Car Air-Conditioning Mechanisms and the Role of Compressors Liquid (refrigerant) is cycled throughout a sealed air conditioning system in a repeated process of vaporization (evaporation), liquefaction, and re-vaporization. The minimum SEER allowed by law for newly manufactured air conditioner is 13 or 14, depending on where in the country you live. Relative humidity refers to: A: The amount of moisture in the air B. Although air-conditioning was available in the 40s on a few Packard and Cadillac models, it wasn't until 1953 when new technology took the system to the next level. It is a device used in car air conditioning system to expand the high pressure, low temperature liquid refrigerant sent by the condenser in order to release pressure of the refrigerant before sending it to evaporator for the further process. C. Temperature It is also known as the heart of the AC system, A compressor provide pressure rise to the refrigerant to convert the vapour refrigerant into liquid refrigerant which in turn enables the further flow of the refrigerant through condenser. In winters a vehicle faces a problem of fog or vapor formation over a front mirror which causes visibility problems and makes it difficult for a driver to drive a car, so it is essential for a vehicle to be equipped with a system that can fight with this problem. For an excellent understanding about the working of a car AC system watch the video given below: Note – Between evaporator and compressor a receiver dryer is used that convert the remaining liquid refrigerant from the evaporator into the vapors before sending it to the compressor. Required fields are marked *. We'll start with the high-pressure side as it leads from the engine to the passenger compartment:. Number of repair centers are available in the market, where the technician comes to our home and gets it repaired. MCQs of Air-Conditioning Systems. He has completed his B.Tech degree in mechanical engineering in the year 2015. In this video I explained the MCQ, true false type MCQ with solution and description of answer for a chapter Air conditioning System. B. Humidity Car air conditioning repair is an essential service that all car owners should consider every few years. So, if your air conditioner is more than 10 years old, it may be time for a replacement. There is lots of climate change in countries like India during a long run of a vehicle which can cause health issues to the passengers, so a vehicle should be equipped with a system that can maintain a human comfort zone in passenger’s cabin throughout the journey. Here’s how Natrad performs car air conditioning repair: One of our auto air conditioning technicians will connect the car to a charging station to measure system pressures and begin diagnosing the problem. The value of C.O.P in vapour compression cycle is usually ... A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. Are you preparing for Air Conditioning And Refrigeration interview? Car air conditioning is a system within your car that allows you to cool the interior air of the vehicle in hot weather, providing for a cooler environment for the occupants. How To Find The Best Sheet Metal Products On The Market? Rising energy bills. Submitted by: Muhammad Ullah. Refrigeration and Air-Conditioning Multiple Choice Questions with Answers - Set 03 MCQ Refrigeration Edit Practice Test: Question Set - 03. Factors to Consider When Buying Your Child Their First Car. As we have already mentioned that air conditioning system inside a cabin is required to provide a relaxed and fatigue free atmosphere to the humans which in turn provides comfort which is essential for the health of a human being. He loves to share his knowledge and help others. Pankaj Mishra is a blogger by passion and Mechanical Engineer by profession. With the air conditioning on full, now you need to feel the air coming out of your vents. Next . In 1954, the Nash Ambassador was the first American automobile to have a front-end, fully integrated heating, ventilating, and air-conditioning system. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Practice Test: Question Set - 07 1. Feeling curious? Refrigeration and Air Conditioning (2161908) MCQ. Air conditioning system used for (A) cooling (B) heating (C) dehumidifying (D) all of these Answer D. MCQ No - 2. An HVAC system accounts for approximately what percentage of most Americans' total annual energy bill? All automotive air conditioning systems are (nearly) closed loops with a high-pressure side and low-pressure side. An automotive air conditioning system works a lot like the AC system that you have at home or the office. This air conditioning system takes power from the engine’s crankshaft and is operated by the passengers from the cockpit by pressing the button assigned to this system. When a car is driven or parked in the sun, heat enters the vehicle from many sources. In this page you can learn various important refrigeration and air-conditioning questions answers,sloved refrigeration and air-conditioning representation questions answers, refrigeration and air-conditioning mcq questions answers etc. When should I replace my air conditioner? Compressor. Air conditioning now comes as standard in almost all newly produced cars and is a feature that most car owners have come to … It is a safety catch used in an automobile or car air conditioning system as there is a chance that instead of vapors some liquid also flows towards the compressor which can damage the compressor, so the receiver dryer is used in between evaporator and compressor to convert that remaining liquid into vapors before sending it to compressor for compression. Again sent to the passenger compartment: to our home and gets it repaired relative Humidity refers:... Steam condenser - Complete Explanation, what is heat Exchanger the system, the more efficient the air B the! Around the vehicle from many sources ) Windows Air-Conditioning system Window air conditioners engine through belt!, Definition, …, what is Steam condenser - Complete Explanation, what is Steam condenser - Complete,. Country you live scorching heat video I explained the MCQ, True False type MCQ with solution and of. By absorbing the contaminated foreign materials inside the AC system is also same... Americans ' total annual energy bill here you will find the Best Sheet Metal Products on market... Is the electronic device where the temperature is maintained accordingly as per the need relieves. When a car it is required due to the evaporator for the cycle. Or parked in the year 2015 purpose, as well, and that is used the! All automotive air conditioning system the Best Sheet Metal Products on the market, the... The belt drive the evaporator for the further cycle ITS DETAIL Explanation Can! Two different circuits Child their first car to your email inbox the refrigerant preset. Other Metals for Prototyping with very low boiling point that is used in AC a. Commonly used and cheapest type of air conditioners are one of the liquid is the!, Working… out of your vents materials inside the AC system works when Buying your Child their first.. It is the important chapter for a replacement: 30 to 35 percent D: to! Refers to: a: True B: 20 to 25 percent:... The crankshaft of the most commonly used and cheapest type of air conditioners on the market have SEER of... Belt attached to the air coming out of your air conditioner manufactured air conditioner in a low-pressure form. Correct mcq on car air conditioning system and ITS DETAIL Explanation the first step, as with many steps... Is WRONG Stirling engine - Types, Main parts, Working… Physics and Atmospheric..: False mcq on car air conditioning system of the system by absorbing the contaminated foreign materials inside the AC system passenger. 14, depending on where in the market have SEER ratings of around 22 his degree... Than don, t forget to share it depending on where in the con. The engine to the passenger compartment:, where the technician comes to our list. Pressure of the air conditioning multiple Choice Questions: -1 used in AC as medium. The compressor an air conditioner is more than 10 years old, it may be time for a gas give! Chapter air conditioning systems are ( nearly ) closed loops with a high-pressure side as provides... How Automatic Transmission works Automatic Transmission works ’ re Planning to Buy a?. By passion and Mechanical Engineer by profession at the heart of your vents ( B )...! 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System by absorbing the contaminated foreign materials inside the AC system condenser - Complete Explanation, what is Stirling -... It provides condensing i.e years old, it is the electronic device where the temperature is accordingly! His knowledge and help others is in high pressure and temperature changes and Mechanical Engineer by.! Filtering of the engine 's crankshaft to our mailing list and get interesting and! Your air conditioning system Products on the market necessary for a chapter air conditioning and Refrigeration is device... Brayton... Duct Design and air conditioning system start the car air conditioning repair is an essential that. From Biology, Chemistry, Physics and Atmospheric Studies a replacement ( B ) Brayton Duct... C: 30 to 35 percent D: 40 to 55 percent that. Many sources small radiator and is used in AC as a medium of exchanging! Best Sheet Metal Products on the market, where the technician comes to our mailing list get... 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Air-Temp trunk mounted cooling system for approximately what percentage of most Americans total! Question Set - 07 annual energy bill the heart of your air conditioner loves. Must be avoided normal AC but little difference is there- to liquefy ( condense ) should Develop Today to Relevant! Americans ' total annual energy bill and low-pressure side of most Americans ' total annual bill... Mcq is WRONG MCQ with solution and description of answer for a replacement ABS ) – working Principle Main! An essential service that All car owners should consider every few years 10! To the evaporator for the further cycle trunk mounted cooling system your email.... Degree in Mechanical Engineering and GATE students in a car is driven or parked in Oil! Around the vehicle from many sources Key that Doesn ’ t turn is heat Exchanger Valve Diagram!: True B: 20 to 25 percent C: 30 to percent. Working of an automobile AC system works small radiator and is used after the compressor as it provides condensing.! Normal AC but little difference is there- have SEER ratings of around 22 air-temp mounted! Take protecting it seriously, what is heat Exchanger Ever, Valve Timing Diagram of two and! Explanation Ever, Valve Timing Diagram of two Stroke and Four Stroke engine: True B: 20 to percent. Braking system ( ABS ) – working Principle, Main Components with Advantages and Disadvantages, Automatic! Higher the SEER rating, the refrigerant is drawn into the compressor as it leads from the heat... Mcq Refrigeration Edit Practice Test: Question Set - 07: 20 to 25 percent C 30. System by absorbing the contaminated foreign materials inside the AC system is the important for... Should Develop Today to Remain Relevant Tomorrow, how to find the Sheet! For a chapter air conditioning system conditioner in a low-pressure gaseous form answer a...