Specifications
10. Water Heaters & Coffee makers
Water Heater – Function – Types – Electric Kettle – Immersion water heater – Construction
and working – storage water heaters – Non pressure type – pressure type – construction and
working – repairs & remedies – Coffee maker – types – construction and working of percolator
type.
11. Electric Mixer & Egg beaters
Electric Maker – Function – Construction – General Operating Instruction – Caution – Cleaning
– Repairs and Remedies – Egg beaters – Hand operated crank type – Electric type – Construction.
12. Vacuum Cleaner and washing machine
Vacuum Cleaner – Function – Principle – Main components – features – types - working –
accessories - Filters – Repairing.
Washing Machine – Function – Types – Semi and Fully Automatic – Top and Front loading –
washing technique – working cycle – construction and working of washing machine – comparison
of Top and front loading machines – Problems and Remedies.
13. Electric Fan & Hair Drier
Electric Fan – Function – Terminology – Construction and Working of Ceiling & table fans –
Exhaust Fan – General Fault and Remedy.
Hair Drier – Function – Types – Construction and working – safety features – repairs & remedies.
14. Centrifugal Pump :
Introduction – Constructional features – working – friction lead – static suction head – static
delivery lead –automatic operation of pump – Trouble shooting.
15. Maintenance of Rotating Machines
Introduction – Types of maintenance – preventive maintenance schedule – Fitting and removing
of a bearing - Maintenance of bearing – Balancing – Preventive maintenance of electric
equipments – General procedure for overhaul of motors – Maintenance of AC Motors ––
Insulation resistance of a motor - Defects in brushes, brush gear - Trouble shooting chart –
defects in commutator – Degreasing – Varnish application - Vacuum Impregnation.
16. Maintenance of Transformers :
Introduction – Action taken for rise in oil temperatures and falling of oil level – methods of drying
out of transformers – Time of drying out operation - Qualities for Transformer oil – methods of
purifying and drying out of transformer oil – Checking of dielectric strength of transformer oil –
action taken for transformer failure - periodical overhaul.
iv