It is odorless, non-toxic, non-flammable, non-explosive and non-corrosive. b. Teflon. 10. – R134a is the nonflammable and non-explosive, has toxicity within limits and good chemical stability. (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 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 ... A. These short solved questions or quizzes are provided by Gkseries. Which one of the following is used as a refrigerant? 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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One tonne of ice when melts from at 0 0 C in 24 hours,the refrigeration effect produced is equivalent to 210 kJ/min a) Makes chemicals by mechanical means. 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. However, contrary to HFCs, its GWP is negligible when applied as a refrigerant. (a) ... MCQ or Objective. Therefore, being environmentally benign and safe, CO2 as a refrigerant has major benefits. 58. Ozone Depletion Objective Type Questions and Answers for competitive exams. a. Sulfur dioxide: Sulfur dioxide was widely used as refrigerant during the early 20th century. This I.C. Carbon dioxide is widely used as a refrigerant in mechanical systems refrigerant, marine services, hospitals, etc. Some of the methods used to reduce diesel smoke are as follows (a) using additives in the fuel (b) engine derating i.e. C. 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