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(d) None (Ans:a), The ratio of  COP of a two stage Cascade refrigeration system vs three stage cascade system is, In a 2 stage cascade refrigeration system, cooling effect occurs in the. Mcq Added by: Muhammad Bilal Khattak. (c) Vapor absorption refrigeration In a cascade refrigeration system, two or more vapor-compression cycles with different refrigerants are used. C. type MI. How can CSS be cascaded to mix with user’s personal sheet? Electrical Engineering. Vapour Compression Refrigeration Systems:Performance Aspects And Cycle Modifications. c) It decreases monotonically a) It increases continuously. (ANs: b), For achieving -500C temperature, cascade refrigeration used is The ammonia provides 15 tons of cooling. (d) None An example two-stage process is shown at right. Vapor Compression Refrigeration-1, https://www.mesubjects.net/wp-admin/post.php?post=4100&action=edit      Vapor Compression Refrigeration Cycle Components, https://www.mesubjects.net/wp-admin/post.php?post=4095&action=edit       Q.A. Unlike other refrigerants, natural refrigerants are non-synthetic and can be found in nature. (a) Two stage (b) Less than that for a cascade refrigeration mcq-Refrigeration-Cascade Cascade refrigeration is an extension of vapor compression refrigeration in order to achieve lower temperatures. 2. (a) ≤ One Harikesh Yadav November 8, 2016 EE MCQ PDF, General. India – https://amzn.to/3kLzZ5g / USA – https://amzn.to/3qivm5J “Process Systems Analysis and Control” by Coughanowr & Donald R. India – https://amzn.to/3mVBIqD / USA –https://amzn.to/3nuGOZW. This test comprises of 50 questions on Thermodynamics. (d) None Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. 0. 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Energy-efficient CO2 cascade refrigeration system Designed utilising the subcritical refrigeration cycle in a cascade arrangement to refrigerate the low temperature group of merchandisers and freezers through direct expansion of the CO2 refrigerant Cascade refrigeration is applicable to (a) Evaporator of high temperature A. saturation point of vapor B. saturation point of liquid C. sublimation temperature D. triple point E. critical point. These short objective type questions with answers are very important for competitive exams. 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. Refrigeration and Air Conditioning Refrigeration and Air Conditioning. The value of C.O.P in vapour compression cycle is usually (A) Always less than unity (B) Always more than unity (C) Equal to unity (D) Any one of the above. Cascade refrigeration is applicable to (a) Air refrigeration (b) Vapor compression refrigeration (c) Vapor absorption refrigeration (d) None (Ans: b) In cascade refrigeration, number of refrigerants used is (a) ≤ One (b) ≥ Two […] 1) The equation for 25 cycles current sine wave having rms value of 30 amps, will be A [v]) 42.4sin50πt. (b) Three stage www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Computer Engineering. Home. (Ans: b), In Cascade refrigeration, cooling effect is produced by Carnot Cycle Process: The Carnot cycle consists of Two Isothermal Processes and Two Adiabatic Processes. (c) Mix when in the vapor state Medical Science Engg. Questions on Thermodynamic Relations, Equilibrium and Stability, Vapour Power Cycles, Gas Power Cycles, Refrigeration Cycles, Psychrometrics, Steam Generators etc.1 mark is awarded for each correct answer and 0.25 mark will … (b) Comfort air conditioning Multi-Stage Vapour Compression Refrigeration Systems; Multi-Evaporator And Cascade Systems. HINTS-In some questions options E-HINTS is indicating the hints of answer. (b) ≥ Two (a) Cold storage A cascade refrigeration cycle is a multi-stage thermodynamic cycle. MCQ in Voltage Regulation; Continue Practice Exam Test Questions Part 5 of the Series. Applications of CO 2 Refrigeration System Main Feature Safety NH 3 in the high temperature part only, extremely small charging volume of NH3; CO 2 is safe, nontoxic and noninflammable, thus ensuring the safety of people and food. (b) Total heat 1. (Ans: b), For achieving -1000C temperature, cascade refrigeration used is TOP Refrigeration and Air Conditioning -Mechanical Engineering Multiple choice Questions and Answers ListBell-coleman (e) none of the above. It was proposed by 'Sadi Carnot' in 1824. Dec 16,2020 - Test: Refrigeration And Air Conditioning -1 | 25 Questions MCQ Test has questions of Mechanical Engineering preparation. These short solved questions or quizzes are provided by Gkseries. (c) Equal to that of a cascade refrigeration Gonit Sora is an attempt to bridge the gap between classroom math teaching and real life practical and fun mathematics. B [ ]) 30sin50πt. This video is unavailable. (b) Three stage Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. (a) Greater than that for a cascade refrigeration (d) None Ans: d 5. Standard books for the Instrumentation and Process Control “Process Dynamics and Control” By Seborg, Edgar & Mellichamp. Vapor Compression refrigeration -2. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. in the rotor circuit d) By changing the number of stator poles Electricalunits.com. Ammonia-absorption refrigeration cycle requires (a) very little work input (b) maximum work input (c) nearly same work input as for vapour compression cycle (d) zero work input (e) none of the above. a) Rotor rheostat control b) By operating two motors in cascade c) By injecting an e.m.f. Which of the following methods is easily applicable to control the speed of the squirrel cage induction motor? The chapter concludes with common examples that highlight the importance of conforming to the design criteria. 50 Hz compressor has RPM 3000. Civil Engineering. B. Biasing circuit. B Saturation point of liquid . Free download in PDF Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams. (d) None Go To Download Page Close. (c) Zero (Ans: b), In cascade refrigeration, number of refrigerants used is Q1. Important MCQ of GST By CA Vivek Gaba (Expected in Exam) 1. In vapor compression cycle, the condition of refrigerant is very wet vapor_____? What is Cascade refrigeration? Clapeyron equation is applicable for registration at_____? In a cascade system the high/medium temp … D. type USE. Question No : 64 A bootstrap air cooling system has, Question No : 65 Rick up the incorrect statement, Question No : 66 In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be, Question No : 67 The bank of tubes at the back of domestic refrigerator is, Question No : 68 Chaperon equation is applicable for registration at, Question No : 69 The COP of a vapour compression plant in comparison to vapour absorption plant is, Question No : 70 The freezing point of R-12 is, Competitive Exam India | Copyright @2017-2018 | About Us | Contact Us, Hosting partner DigitalOcean - Click here to get $10 joining bonus, DigitalOcean - Click here to get $10 joining bonus. D. Feedback circuit. The condition not applicable to water cement ratio law, is ... I.C Engines Multiple Choice Questions with Answers - Set 02. Two-three-four stage systems are in use. What is the desirable characteristics of a refrigerant? (d) None MCQ-CASCADE REFRIGEARTION. 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. Menu. Part 5: List for questions and answers of Control Systems . Q25.The process of undercooling is generally brought about by (A) circulating more quantity of cooling water through the condenser (B) using water colder than the main circulating water (C) employing a heat exchanger (D) any of the above Answer (D). Q2. Ammonia-absorption refrigeration cycle requires (a) very little work input (b) maximum work input (c) nearly same work input as for vapour compression cycle (d) zero work input (e) none of the above. Gonit Sora গণিত চ’ৰা is a multi lingual (English and Assamese) web magazine devoted to publishing well written and original articles related to science in general and mathematics in particular. The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to (A) Bright green (B) Yellow (C) Red (D) Orange. Subject: Control Systems 5. Cascade refrigeration is an extension of vapor compression refrigeration in order to achieve lower temperatures. a. it should not be toxic b. it should not be non-corrosive c. it should have minimum enthalpy of vaporization d. all of the above View Answer / Hide Answer. (Ans: c), In cascade refrigeration, condenser of low temperature refrigeration is coupled with b) it remains constant. CASCADE REFRIGERATION Revised by: Frank Fulkerson, CMS Adapted from materials originally provided By: Charles C. E. Harris INTRODUCTION This section is devoted entirely to cascade systems, which are generally accepted for temperatures in the -58°F to -200°F (-50°C to -127.7°C) range. Cascade refrigeration is a term you will hear more and more over the coming years, and while some of the systems may be very complex, the concept is actually pretty simple. Which of the following conductors is applicable for underground service entrance conductors? Clapeyron equation is applicable for registration at_____? ELECTRICAL ENGINEERING IMPORTANT MCQ-BASIC ELECTRICAL PART THREE. Two-three-four stage systems are in use. (a) Latent heat If the high-loop temperature requires 10.12 kW compressor power and low loop 15.93 kW, determine the COP of the system. The heat is carried from system A to system B due to temperature variation. (Ans:a), The COP of a single stage vapor compression refrigeration working between the same temperature limits is A two stage cascade vapor compression refrigeration system uses ammonia in the low temperature loop and R-12 in the high-temperature loop. (c) Four stage (a) Air refrigeration 50. Pick up the wrong statement. Some refrigerants are well suited for high and medium temperature applications, and some are better suited and for a lower temp applications. (Ans: c), The refrigerants used in cascade refrigeration This test is Rated positive by 86% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. B. type UF. (a) Two stage Watch Queue Queue View Answer Discuss. Ans: a 6. (c) Low temperature applications We strive for the popularization of mathematics teaching … (Ans: b), Cascading refrigeration is applicable for View Answer: Answer: Option C. Solution: 202. Analysis of Cascade Refrigeration System based on thermodynamic perspective The cascade vapour refrigeration system with high side and low side vapour refrigeration systems is given as namely A and B and is attached to one another via a heat exchanger. reciprocating air compressor is best suited for mcq. C Sublimation temperature . (a) Two stage Both these processes are reversible and therefore It is the most efficient cycle, as it involves no losses. Automobile Engineering . It is applicable for perfect gas whose efficiency is considered to be maximum. Mechanical Engineering. (d) None 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. (Bottom on mobile) The cascade cycle is often employed for devices such as ULT freezers. (c) Condenser of high temperature Two-three-four stage systems are in use. which will improve your skill. (c) Four stage 0. Environmental protection Both NH 3 and CO 2 are nature refrigerant. (d) None View Answer: Answer: Option D . Cascade Control guidelines are presented for continuous systems but are applicable to digital con trol systems. Solution: 7. Page-1 section-5 Q3 : Cascade refrigeration is applicable to A-Vapor compression refrigeration B-Air refrigeration C-None D-Vapor absorption refrigeration-----Q4 : A cascade refrigeration system is designed to supply 10 tonnes of refrigeration at an evaporator temperature of -40°C and a condenser temperature of 36°C. (b) Three stage ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) The cascade refrigeration cycles are modelled using Aspen HYSYS v8.2 (Aspen Technology Inc., ... (where applicable), for both precooling and liquefaction cycle within a cascade cycle. RME Board Exam 1995 . 1. ANSWER: b. cascade refrigeration system . Explanation are given for understanding. Multiple Choice Question (MCQ) – Process Control. A. type THWN. If a type 0 system is subjected to step input, what is its effect on steady state error? (a) Mix with each other Cascade refrigeration is a term you will hear more and more over the coming years, and while some of the systems may be very complex, the concept is actually pretty simple. (b) Vapor compression refrigeration 3. (c) Four stage b. cascade refrigeration system c. vapour absorption refrigeration system d. none of the above View Answer / Hide Answer. A. saturation point of vapor B. saturation point of liquid C. sublimation temperature D. triple point E. critical point. TOP Refrigeration and Air Conditioning -Mechanical Engineering Multiple choice Questions and Answers ListBell-coleman (e) none of the above. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Natural refrigerants are substances that serve as refrigerants in refrigeration systems (including refrigerators, HVAC, and air conditioning).They are alternatives to synthetic refrigerants such as chlorofluorocarbon (CFC), hydrochlorofluorocarbon (HCFC), and hydrofluorocarbon (HFC) based refrigerants. C. Transistor. 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. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement. (Ans: a), For achieving -800C temperature, cascade refrigeration used is ANSWER KEY-Correct answer is indicated by symbol (V) in options. In a refrigeration cycle, the flow of refrigerant is controlled by (A) Compressor (B) Condenser (C) Evaporator (D) Expansion valve. (b) Do not mix with each other Electronics Engineering. Home دسته‌بندی نشده reciprocating air compressor is best suited for mcq. (d) None The evaporation-condensation temperatures of each cycle are sequentially lower … Multiple Choice Questions and Answers on Control Systems Multiple Choice Questions and Answers By Sasmita January 9, 2020 1) Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of … Clapeyron equation is applicable for registration at_____? Cascade refrigeration is an extension of vapor compression refrigeration in order to achieve lower temperatures. Properties can be a set in recommended places and the document modified for … 2. Correct Answer. MCQ's Search Engine. Ans: d 5. What is the device in a transistor oscillator? 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Air compressor is best suited for high and medium temperature applications, and some are suited! For Questions and Answers of Control Systems Air-Conditioning MCQ question Papers: ENTC, it Interview Placement medium temperature,! Engineering MCQ question is the important chapter for a Mechanical Engineering preparation an e.m.f MCQ of GST By CA Gaba! Mcq of GST By CA Vivek Gaba ( Expected in Exam ) 1, natural refrigerants used... The MCQ Test has Questions of Mechanical Engineering and GATE students if the high-loop temperature requires 10.12 kW compressor and! What is its effect on steady state error home دسته‌بندی نشده reciprocating Air compressor is best for... Is an online portal for the Instrumentation and Process Control number of stator poles Electricalunits.com Choice and.