In order to upgrade the skills and proficiency of the young generation and also to provide them awareness to explore about various career options the CBSE has started offering 40 courses at Senior Secondary level. The skill education envisions imparting the procedural knowledge and skills to the students that will enable students to excel and emerge successful in real situation of both work and life.
It works towards imparting an education that is holistic, meaningful and skill oriented which instils among the youth a sense of usefulness and responsibility. You can choose either one or two or three skill subjects from skill electives. You have to choose other elective subjects from academic electives.
Subjects that cannot be taken together
- Physics (042) and Applied Physics (838)
- Chemistry (043) and Applied Chemistry (839)
- Mathematics (041) and Applied Mathematics (840)
- Informatics Practice (065) and Information Technology (802) or Web Application (803)
- Business Studies (054) and Business Administrations (833)
After successfully completing the two year of Senior Secondary Vocational Course the student would have acquired relevant appropriate and adequate technical knowledge together with the professional skills and competencies in the field of Air conditioning and Refrigeration Technology so that he/she is properly equipped to take up gainful employment in this vocation.
Part B: Vocational Skills (50 Marks)
1. Introduction
Meaning of Air Conditioning and Refrigeration, Brief history of Air Conditioning and Refrigeration general safety, Application of Refrigeration, Concept of System, its boundary, and surroundings, Unit of Refrigeration, use specification of Refrigeration tools Equipment, Instruments. Basic knowledge of heat energy. Comparison of heat engine heat pump and refrigeration machine. Rating of Refrigeration Machines & Co-efficient of performance. 6
2. Vapour Compression Cycle, Representation of Vapour Compression Cycle on temperature тАУ entropy and pressureтАУ enthalpy diagram, Effect of sub-cooling, Super heating, change in suction pressure and discharge pressure on coefficient of performance, Deviation of actual cycle from the theoretical cycle. 6
3. Working of a Domestic Refrigerators, Water Cooler& defreeze Refrigeration Tyre operation. Refrigeration tools and materials, tubing, cutting, bending, flaring, joining, tube, fittings, instruments and gauges. 6
4. Meaning of Compressors, Types of compressorтАУreciprocating (semi-hermetic, hermetic and open types), rotary, centrifugal and screwed type. Working of compressor. 5
5. Compressor construction, Valves, pistons, connecting rods, crankshafts, seals, oil circulation, hermetic and semi-hermetic units, cooling of windings, Mufflers. 5
6. Meaning of Alternating Current D.C currents, Violate & phase difference knowledge of ohmтАЩs law, measurement of current, voltage & power. 5
7. Wiring circuit diagrams of refrigerators and air conditioners. 3
8. Psychometry тАУ Composition of air, moist air, vapours and gases, specific humidity, absolute humidity, degree of saturation, relative humidity, Dry Bulb Temperature. 5
9. Human comfort, Concept of effective temperature, Comfort Zone. 3
10. Applications of Air Conditioning, Comfort, Industrial and Process Air Conditioning, Study of Window тАУ type Air Conditioners, package units, Central Air Conditioning Plants. 3
11. Measurement of air velocity and flow. 3
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