(a) Explain 'shortcycling' in the context of refrigeration and air-conditioning. State causes and it's avoidance (5)

(b) State the symptoms of 'overcharging' and 'undercharging' in refrigerator system. What are its effects and state remedial measures (6)

(c) State indications of oil in refrigeration system. What would be its effects? State remedial measures (5)