Table of Content
 

 

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