Articles Posted in the " refrigeration " Category

  • REFRIGERATION FILLING BLANKS AND MATCH COLUMNS CLASS NOTES

    REFRIGERATION FILLING BLANKS AND MATCH COLUMNS CLASS NOTES

    REFRIGERATION FILLING BLANKS AND MATCH COLUMNS CLASS NOTES   In refrigeration, fill in blanks is done with deep understanding and clarity. This process of filling blanks  increases knowledge. It helps  to apply fundamentals in real life applications. Fig. Simple Vapor Compression Refrigeration Fig. Vapor Absorption Refrigeration Fill in the blanks in refrigeration is from university […]


  • REFRIGERATION-TROUBLE SHOOTING CLASS NOTES

    REFRIGERATION-TROUBLE SHOOTING CLASS NOTES

    REFRIGERATION TROUBLE SHOOTING CLASS NOTES   Trouble shooting in refrigeration and air conditioning tells the working faults of a system. Discussed remedial measures. Few precautions will make the system trouble free. List of troubles encountered UNIT DOES NOT RUN AT ALL REFRIGERATION UNIT RUNS BUT NO COOLING LESS COOLING BUT THE UNIT RUNS  CONTINUOUSLY RUNNING […]


  • VAPOR ABSORPTION REFRIGERATION QUESTIONS ANSWERS

    VAPOR ABSORPTION REFRIGERATION QUESTIONS ANSWERS

    VAPOR ABSORPTION REFRIGERATION  QUESTIONS ANSWERS   Vapor absorption system can operate without the use of electricity. The heat energy operates the system. Obtain heat  by burning of fuel or wood & solar energy. Use of solar energy makes it eco-friendly. It resembles very much with a vapor compression system. It uses different means of compression. […]


  • REFRIGERATION LAWS CLASS NOTES FOR MECHANICAL ENGINEERING

    REFRIGERATION LAWS CLASS NOTES FOR MECHANICAL ENGINEERING

    REFRIGERATION LAWS CLASS NOTES FOR MECHANICAL ENGINEERING Evaporator abstracts heat from the products/space to be cooled. Compressor adds energy to raise its temperature and pressure. This enabled the refrigerant to lose heat in the condenser equal to the sum of cooling effect and work input. High pressure helps the refrigerant to re-circulate. Re-circulation causes the cooling […]


  • VAPOR COMPRESSION REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    VAPOR COMPRESSION REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    VAPOR COMPRESSION REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS MCQ increases clarity and understanding. Most commonly used method of refrigeration is vapor compression refrigeration. Cooling capacity is the cooling produced per minute. Refrigeration is measured in tons of refrigeration (1 ton = 211kJ/min of cooling effect).Cooling effect is caused by latent heat in vapor refrigeration […]


  • NON CONVENTIONAL REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    NON CONVENTIONAL REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    NON CONVENTIONAL REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS      MCQ makes the concept very clear. More MCQ may be practiced to improve knowledge further. Then, it is very useful in the design, construction and working of the system.   1. The materials of thermoelectric refrigeration systems should have: (a) High electrical and thermal […]


  • CASCADE REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    CASCADE REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    CASCADE REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS Cascade refrigeration is an extension of vapor compression refrigeration in order to achieve lower temperatures. There are independent refrigeration circuits using different refrigerants. These are interconnected. Two-three-four stage systems are in use. Fig. Two stage Cascade refrigeration Line diagram & its representation on p-h Chart 1. Cascade […]


  • VAPOR ABSORPTION REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    VAPOR ABSORPTION REFRIGERATION MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    VAPOR ABSORPTION REFRIGERATION MULTIPLE CHOICE QUESTIONS WITH ANSWERS (MCQ)  Vapor absorption refrigeration is like a vapor compression system. The means of compression are different. It causes refrigeration from heat. 1. Vapor absorption refrigeration uses (a) Mechanical energy (b) Electric energy (c) Kinetic energy (d) None (Ans: d) 2. Vapor absorption refrigeration uses (a) Mechanical energy […]


  • VAPOR COMPRESSION REFRIGERATION QUESTION ANSWERS

    VAPOR COMPRESSION REFRIGERATION QUESTION ANSWERS

    VAPOR COMPRESSION REFRIGERATION QUESTION ANSWERS Question answers on basics of refrigeration increases the level of understanding very deeply. Compressor, condenser, receiver, evaporator are essential components of refrigeration. Condensing unit is motor, compressor, condenser and receiver. Different prime movers run refrigeration units. What is the meaning of condensing unit? Condensing unit is the assembly of motor, […]


  • REFRIGERATION EXPANSION VALVES MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    REFRIGERATION EXPANSION VALVES MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

    REFRIGERATION EXPANSION VALVES  MULTIPLE CHOICE QUESTION (MCQ) WITH ANSWERS  MCQ increases the understanding and clarity. More and more MCQ on expansion valves used in refrigeration will be of further usefulness. Capillary tube is used in plants having cooling capacity of (a) < 3 tons (b) > 3 tons (c) <10 tons (d) None (Ans: a) […]