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Q3. With the aid of a simple sketch, explain the “trouble spots” in a basic air-conditioning unit and with reference to your sketch, explain the following: -

(a). How is capacity control achieved?

(b). How is humidity control achieved & why is it important? How the problem of increase in humidity of cooled air is overcome?

(c). How discomfort caused by the excessive drying effect of heated air is overcome?

(d) Why are generally blower run with v belts? State possible reasons if the blower is vibrating?