Filed Under: Electrical MCQ. Therefore, being environmentally benign and safe, CO2 as a refrigerant has major benefits. Automation is preferred because it: a) Offers lesser dependence on workers b) Results in reduction in variable cost c) Offers easy handling of repetitive work d) All of the given options The Carbon Dioxide Regerating Cycle The following question remains: Is CO2 also well suited for application in refrigeration, air conditioning, and heat pump systems? These short objective type questions with answers are very important for Board exams as well as competitive exams. C. One tonne of water can be converted into ice. 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. 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These short solved questions or quizzes are provided by Gkseries. – Refrigerant R134a is a hydro fluorocarbon (HFC) that has zero potential to cause the depletion of the ozone layer and very little greenhouse effect. a. to increase the refrigerating effect b. to reduce the mass of vapour formed during expansion process c. to reduce vapour bubbles which obstruct the flow of liquid refrigerant d. all of the above The refrigerant used is (a) Ammonia (b) Carbon dioxide (c) Freon (d) Brine (e) Hydrocarbon refrigerant. d. All of the above. Loss of forest has led to. These short solved questions or quizzes are provided by Gkseries. may increase or decrease depending on the type of refrigerant used ⇒ The alignment circle is marked on the psychrometric chart at. Subject: Automobile Engineering 5. One tonne of refrigerant is used. Q1. reducing the maxi-mum flow of fuel (c) increasing the compression ratio (d) adherence to proper fuel specification (e) … Q.While designing the refrigeration system of an aircraft the prime consideration is that the. The refrigerant used for absorption refrigerators working heat from solar collectors is mixture ofwater and. A.Carbon dioxide. Shield metal arc welding; Gas tungsten arc welding; ... MCQ Multiple Choice Questions and Answers on Welding. In this page you can learn various important multiple choice questions on ic engine,mcq on ic engine, objective type questions on ic engines,ic engine short questions etc. A. Mass of the refrigeration equipment is low. Which of the following is false regarding welding process and its corresponding minimum thickness of plate material? – It has a somewhat high affinity for moisture. Q8. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) Ans:- cylinder block . Good Luck! a. Freon. 2. Engines MCQ test that checks your basic knowledge of I.C. Primary Sidebar. MCQ on Basic Electrical. 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. Engines MCQ Quiz & Online Test: Below is few I.C. However, contrary to HFCs, its GWP is negligible when applied as a refrigerant. Q.Which of the the following refrigerant has the highest freezing point Carbon dioxide Ammonia Frion 12. suction pressure discharge pressure critical pressure Ans: b 2. b. Teflon. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. b. Ever since 1993 R-134a has been the staple refrigerant for automotive applications. Most refrigeration units depend on the chemical reactions of refrigerant gas to remove heat from an enclosed area. It is odorless, non-toxic, non-flammable, non-explosive and non-corrosive. D. One tonne of ice when melts from at 0 0 C in 24 hours,the refrigeration effect produced is equivalent to 210 kJ/min ⇒ The automobile radiator is a heat exchanger of. due to its excellent safety properties. It readily evaporates and condenses or changes alternatively between the vapor and liquid phase without leaving the refrigerating plant. 76. Sulfur dioxide: Sulfur dioxide was widely used as refrigerant during the early 20th century. Carbon dioxide is widely used as a refrigerant in mechanical systems refrigerant, marine services, hospitals, etc. a. Engines Test contains around 20 questions of multiple choice with 4 options. (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 The Following Section consists Multiple Choice Questions on Automobile Engineering. a. 59. 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