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Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 8 Redox Reactions with Answers Pdf free download. – Refrigerant R134a is a hydro fluorocarbon (HFC) that has zero potential to cause the depletion of the ozone layer and very little greenhouse effect. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. 2. Ans: b 2. Erosion of fertile soil. Primary Sidebar. Pick up the wrong statement. Ozone Depletion Multiple Choice Questions and Answers for competitive exams. It readily evaporates and condenses or changes alternatively between the vapor and liquid phase without leaving the refrigerating plant. 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. – It has a somewhat high affinity for moisture. 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Before 93 we used R-12 for our vehicles and now, as I write this article in 2018, there is […] Ans. ... A. R-134a is the most commonly used refrigerant for automotive applications rather it be your twenty year old Toyota Camry or your Kenworth T-200 semi-truck. Q1. Engines Test contains around 20 questions of multiple choice with 4 options. may increase or decrease depending on the type of refrigerant used ⇒ The alignment circle is marked on the psychrometric chart at. Multiple Choice Questions’ Bank: 1. due to its excellent safety properties. Objective Questions and Answer: Automobile Engineering 5. Global warming. a) Makes chemicals by mechanical means. Part 5: Objective questions and answers of Automobile Engineering . b. Shield metal arc welding; Gas tungsten arc welding; ... MCQ Multiple Choice Questions and Answers on Welding. c. Loss of habitat of plants and animals. Vapour Compression Refrigeration Cycle is the most widely used refrigeration system.In this system, the working fluid is a vapor. 76. 5. They used gas systems such as anhydrous ammonia (R-717) or sulfur dioxide (R-764), which occasionally leaked, making them unsafe for home use and industrial purposes. Ans:- ethylene glycol . 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. One tonne of refrigerant is used. Which of the following refrigerant is widely used in domestic refrigeration? a. 98. You have to select the right answer to a question. reducing the maxi-mum flow of fuel (c) increasing the compression ratio (d) adherence to proper fuel specification (e) … MCQ on Basic Electrical. 10. However, contrary to HFCs, its GWP is negligible when applied as a refrigerant. 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One tonne of ice when melts from at 0 0 C in 24 hours,the refrigeration effect produced is equivalent to 210 kJ/min Job shop and batch processing are differentiated on the basis of: a) Job requirements b) Degree of standardization c) Volume of output d) Both (b) and (c) 9. This contains 100 Multiple Choice Questions for Mechanical Engineering Test: Mechanical Engineering- 5 (mcq) to study with solutions a complete question bank. Engines. b. Teflon. Which of the following is false regarding welding process and its corresponding minimum thickness of plate material? (A) A refrigerant should have low latent heat (B) If operating temperature of system is low, then refrigerant with low boiling point should be used (C) Pre-cooling and sub-cooling bf refrigerant are same (D) Superheat and sensible heat of a refrigerant are same Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. Q.Which of the the following refrigerant has the highest freezing point Carbon dioxide Ammonia Frion 12. compression, condensation, expansion, evaporation) in the refrigeration system absorb heat from a low temperature system and discard the heat so absorbed to a higher temperature system. d. Benzol. The commonly used antifreeze solution in automobiles is . Major load carrier in dispersion-strengthened composites (a) Matrix (b) Fiber (c) Both (d) Can’t define 3. Which of the following welding process is used for welding of sheet metals in automobile and air craft industries? – R134a is the nonflammable and non-explosive, has toxicity within limits and good chemical stability. c. Ethanol. Ans:- spark plug gap too wide . Ans: b. ... MCQ ~ Air Conditioning Systems. ⇒ The automobile radiator is a heat exchanger of. 08. Engine misfiring is likely to result from . a. Freon. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. Cummulatively compounded motors are used in the applications where we required (A) constant speed (B) sudden heavy load for a short duration (C) variable speed (D) low starting torque The refrigerant used for absorption refrigerators working heat from solar collectors is mixture ofwater and. which is very easy to understand and improve your skill. I.C. Filed Under: Competitive Exam Quiz Tagged With: Automobile Engineering Questions and answers, Automobile Engineering questions MCQs with answers, Automobile Engineering Quiz, automobile gk questions, Basic Automobile Engineering objective question, Multiple Choice Questions on Automobile Engineering Most refrigeration units depend on the chemical reactions of refrigerant gas to remove heat from an enclosed area. a. Take the Quiz and improve your overall General Knowledge. 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