Technician A says "intent to vent" means the technician is working in a shop without adequate ventilation.Technician B says "intent to vent" means the technician is working on an air conditioner in a shop that does not have a recovery machine for each type of refrigerant being serviced.Who is correct? Presence of moisture in a refrigerant affects the working of (a) compressor (b) condenser (c) evaparator (d) expansion valve. How should gauge set hoses be sized for use in evacuating a system? P = (C.O.P.) of a refrigerator working as a heat pump is given by . Often DOUBLE but in NO case LESS THAN 1.2 times operating pressure. B. Condenser. Definition. This may require filter changes daily/weekly/monthly until the moisture levels are below the point at which oil breakdown can occur e.g. What factors affect the speed of an evacuation? Free. Presence of moisture in a refrigerant affects the working of (a) compressor (b) condenser (c) evaparator (d) expansion valve. In this paper, we shall study about the different refrigerants used in various refrigeration systems. With PAG lubricants, higher functionality improves miscibility for a given viscosity grade. again affect the thermophysical properties of the refrigerant. Increase in refrigerant charge increases the quantity of refrigerant in the system, which increased the cooling capacity and also the COP of the system (Eq.). (e) heat transfer. Compressor. Refrigeration in aeroplanes usually employs the following refrigerant (a) Co2 (b) Freon-11 (c) Freon-22 (d) Air (e) none of the above. Name 3 things that moisture does in a refrigerant system? Meaning of Refrigerant: A refrigerant is a working substance which is used in refrigerating machine. Moisture is considered to cause signiﬁcant damage to inorganic building materi-als. Correct Answer : B. PLEASE COMMENT BELOW … Humidity is measured in either relative humidity (relative terms) or dewpoint temperature (absolute terms). Learn how each type works, what defines them, their pros and cons, and draw a comparison between them here to be able to make an informed decision you won’t later regret. REFRIGERANT PROPERTIES Refrigerants can be characterized by a number of properties. The second tube is used as a tare. Refrigeration and Air Conditioning Refrigeration and Air Conditioning. P = (C.O.P.) What factors affect the speed of an evacuation? Highest COPs of 3.12, 3.07 and 2.96 were obtained with 120 g charge for R152a, R134a and R32, … Moisture is the presence of a liquid, especially water, often in trace amounts.Small amounts of water may be found, for example, in the air (), in foods, and in some commercial products.Moisture also refers to the amount of water vapor present in the air.. Moisture control in products. Refrigerants differ widi respect of the amount of moisture in the soil, they can hold in solution and die effects, which absorbed moisture on system components. Ans: d 31. Right hydrocarbon refrigerants absorb a minimum of moisture. (e) heat transfer. Humidity is the presence of water vapor in the atmosphere. However, if you notice a moisture buildup in a particular location of the refrigerator or if there are signs of excess moisture, these may be indications of a larger problem. The refrigerant that has moisture in it will not just affect the efficiency of the refrigeration system. Compression Ratio The compression ratio needs to be as small as possible otherwise the leakage of refrigerant occurs across the piston. Answer to Presence of moisture in a refrigerant affects the working of (a) compressor (b) condenser (c) evaparator (d) expansion valve . R + 2 . The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and (A) Carbon dioxide (B) Sulphur dioxide (C) Lithium bromide (D) R-12. Mcq Added by: Muhammad Bilal Khattak. A. The coefficient of performance (C.O.P.) Control of moisture in products can be a vital part of the process of the product. As the name implies, water vapor is water in vapor form. Generally refrigerants are classified into various types on the basis of their physical and chemical changes during the course of operation. Presence of air drastically reduces the capacity of the refrigeration system. The most preferred type of the refrigerant mixture is zeotropic mixtures. R + 1 . Ans: d. 30. Share this question with your friends. Having a little bit of moisture on the interior of a refrigerator is completely normal, depending on levels of humidity. Presence of moisture in a refrigerant affects the working of_____? – Adsorption of substances into plastics and elastomers, thereby changing their physical properties and reducing their ability to seal properly. Term. Find an answer to your question Presence of moisture in a refrigerant affects the working of which component How should gauge set hoses be sized for use in evacuating a system? C. Evaporator. Answer & Solution Discuss in Board Save for Later. < 75ppm There are 3 types of drier . Ans: d 30. A column of refrigerant creating weight pressure in the liquid line can be a solution for flash-gas, but may have incidence in the expansion and evaporation. moisture presented in the liquid refrigerants so that Abstract-The performance of heat transfer is one of the most important research areas in the field of thermal engineering. Carbon dioxide. Reply. It is also very important for assessing storability, and it affects end-use value. D. R-12. (e) heat transfer. Definition. Use the shortest length and the largest diameter possible for the quickest evacuation. Ans: d 31. C (C.O.P ) P = (C.O.P) R - 1 . Presence of moisture in a refrigerant affects the working of. Definition. This method is satisfactory when the refrigerant is pure, but the presence of lubricant produces inaccurate results, because the lubricant is weighed as moisture. C. Lithium bromide. A) Technician A only B) Technician B only C) Both A and B D) Neither A nor B . What does the presence of bubbles indicate? Flash-gas may be detected in the system by the observation of bubbles or gas presence in the ... Increasing the pipeline diameter may have incidence on the oil circulation and affect the gas compressor.
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