Domestic appliances

• NECESSITY OF ELECTRITY
• FAULTS OF A MECHANICAL NATURE
• FAULTS OF A MECHANICAL NATURE
• PRECAUTIONS TO BE AS A PREVENTIVE

Conductors and Insulators

• CONDUCTOR
• PROPERTIES OF A GOOD CONDUCTOR
• CLASSIFICATION OF CONDUCTORS Bare Conductors
• Insulated Conductors
• INSULATOR
• QUALITIES OF INSULTIN MATERIALS

Common Electrical Instruments

• Ammeter
• Voltmeter
• Multimeter
• Cable fault locator (Megger)
• Open circuit
• Short circuit

Electric iron (Non –automatic)

• Types of electric iron
• Principle of an electric iron and its parts
• General parts
• Cords
• Handles
• Pressure plate
• Heating elements
• Sole – plate
• Heel –plate
• Terminals
• Possible faults
• Repairs
• Precautions  at the of fitting
• Testing

Thermostat heat controls

• Thermostats
• Bimetal thermostat
• Adjustable  thermostat

Automatic electric iron

• Parts of an automatic iron
• Handle
• Sole – plate and cover
• Thermostat
• Heating  element
• Flex
• Steam / spray iron
• Repairing automatic electric iron

Electric Kettle

• Bottom  cover
• Heating element
• Asbestos sheet
• Sole – plate
• Pressure plate
• Method  of fitting  new element
• Immersion type
• Fitting a new element
• Care and  maintenance

Electric heater

• Introduction
• Electrical heater
• Selection of nichrome wire size
• Heater plate
• Body or frame
• Connecting leads
• Grill stand
• Heater socket
• Safe installation
• Users safety practice
• Precaution to be followed while repairing a heater
• Calorie
• Boiling plate or hot plate
• Soldering iron
• Air conditioner
• Room heater
• Immersion heater
• Immersion heater consists of

Electrical toaster

• Toasters
• Normal operating temperature range of the appliance
•  Rating of toasters
• Types of toasters
• Non-automatic toasters
• Automatic toasters
• Operation of automatic toasters
• Clock-type timer of colour control
• Advanced type of automatic bread toaster
• Clock timer with colour control cord and thermal compensator
• Servicing of toasters, care and maintenance
• Troubleshooting in automatic toasters
• General safety rules pertaining to purchase, test installation and maintenance of domestic appliances

Cooking range having multi-range heat control (Oven) 

• ELECTRICAL COOKING RANGE
• Surface heating elements 
• Step/Selector switches
• Oven unit

Microwave oven

• Off Condition
• Idle Condition
• Cooking Condition
• Oven light
• Blower Motor
• Stirrer motor
• Dual latch switch
• Timer Assembly
• Cook Switch
• Cook relay
• Thermo Cut-Out
• Door safety switch
• Power Transformer
• Voltage – Doubler Circuit
• Magnetron tube

Geyser

• Water heaters
• Storage water heaters/geysers
• Thermostats
• A typical thermostat used in geysers
• Working
• Care and maintenance

Servicing and repairing of a table fan

• Table fan
• Construction
• Construction
• Oscillating unit
• Bearing
• Faults and remedy
• Servicing
• Condition of fan and suggested action
• Motor will not run
• Motor does not respond properly when the selector switch is operated
• Fan is noisy and vibrates
• Fan has magnetic hum
• Bearing of the oscillating
• Mechanism rattle
• How to dismantle
• Varnishing

Servicing, repairing and installing of a ceiling fan

• Ceiling fan
• Construction
• Regulator
• Care and use
• Dismantling and assembling of fans
• Assembling

Mixer

• Maintenance and serving of a food mixer
• Repairs

Wet grinder

• Motor
• Stone
• Pulley
• Frame and stand
• Wet grinder- maintenance and servicing
• Trouble shooting
• Safety measures
• Maintenance practices
• Daily maintenance monthly  maintenance
• Yearly maintenance

Blender

Dishwasher

• Types of dishwasher
• Basic operation
• Dishwasher cycle
• Impeller dishwashers
• Water inlet phase
• Wash phase
• Drain phase
• Rinse phase
• Dry phase
• Wash-arm, dishwashers

Washing machine

• Types of washing machines
• Ordinary type
• Ordinary without timer
• Ordinary with timer
• Semi –automatic type
• Automatic type
•  The pulsator wash technique
• Tumbler type
• The agitator wash technique
• The air power wash technique
•  The chaos punch wash technique
• The neuro fuzzy logic technique
• The water fall technique
• The conventional type with mangle wringer for drying
• The mechanical timer
• The drain jump
• The drive motor
• Locating the machine

Vacuum Cleaner

• Types of Vacuum Cleaner
• The upright Vacuum  Cleaner
• The Cylinder –Type Vacuum Cleaner
• The pot – Type Vacuum Cleaner
• The Portable Cleaner

Emergency Lamp

• Introduction
• Emergency tube light circuit

Water lifting pump

• Selection of pump
• Example
• Pumpset for agricultural purposes
• Given
• Pumps
• Reciprocating pumps
• Rotary pumps
• Submersible pumps
• Disadvantages
• Jet  pumps
• Location of pumps
• Performance with AC 50Hz, 2880 rpm electric motors for 220/240V single phase and 400/440V 3-phase
• Controlling devices
• Operational instructions
• Trouble shooting in pumps
• Trouble shooting chart

Automatic Water level controller (Cellar Drainage pump)

• OPERATION
• SERVICING AND REPAIRS
• Troubleshooting
• The Discharge Head

Air Cooler / Desert Cooler

• The Construction, function and application of Air cooler
• Service of desert cooler
• Service of desert coolers

Thermostatic Switch

• Thermostat
• Working  principle
• Application
• Disc type of thermostats
• Range adjustment

Miniature Circuit Breaker (MCB)

• Types of MCB’s
• Thermal magnetic MCB
• Working
• Magnetic hydraulic MCB
• Assister Bimetal Tripping MCB
• Design and rating of MCB s
• Advantages of MCB
• Disadvantages

Earth Leakage Circuit Breaker (ELCB)

• INTRODUCTION
• Voltage operated ELCB
• Current operated ELCB
• Construction of ELCB
• Working principle of ELCB
• Test Switch
• Technbical specification
• Sensitivities
• Electrical life
• Mechanical life   

Insulation tester (Megohmmeter)

• Necessity of megommeter
• Types of insulation testers
• Construction
• Working principle
• Electronic insuation tester (transistorised Megger)
• Rating 
• Connection for measurement
• Precaution
• Uses of a megohmmeter

Growler

• External growler
• Internal growler
• Growler test for grounded
• Growler test for shorted
• Test for open coil
• Growler test for an open coil

Balancing rotating parts (Armature)

• Importance of balancing the armature
• Static Balancing – Method  1
• Static balancing – Method  2
• Dynamic balancing

Apply for Certification

https://www.vskills.in/certification/Vskills-Certified-Repair-and-Maintenance-of-Domestic-Appliances-Technician