Category   E : Electrical Systems 

                         1. Electrical Theory

     Detailed knowledge of Ohms law, Kirchoff's laws and Electro-
     magnetic  Induction;  their applicability  in  the  aircraft 

     Detailed  knowledge of the Alternating Current and  calcula-
     tion of Instantaneous value, RMS value, frequency and ampli-
     tude  from  the given data; star and delta  connections  and 
     calculation of power in three phase system.

     Detailed  knowledge of series and parallel resonance  of  AC 
     circuits and their use; calculation of resonant frequency of 
     a circuit from a given information; effect of change in  the 
     frequency on the impedance, current and phase angle.

     Detailed knowledge of the composition, performance (stabili-
     ty  and  tolerance) and limitations of the  fixed  resistors 
     (carbon  composition, carbon film, wire wound  and  metallic 
     film) and description of various types of variable resistors 
     (wire wound, carbon film, thermistors and voltage  dependent 
     resistors and varistors).

     Knowledge of the resistor colour codes, value and tolerance, 
     and the system of preferred values and wattage ratings.

     Detailed knowledge of the construction, principles of opera-
     tion,  application  and colour coding of  various  types  of 

     Detailed  knowledge of Circuit Controlling and Current  Pro-
     tection Devices.

                        2. Aircraft Batteries

     Knowledge of the construction and principle of operation  of 
     Lead  acid  and  Nickel Cadmium  batteries,  composition  of 
     electrolytes  and plates.

     Knowledge of the effect of temperature on capacity, specific 
     gravity,  electrolyte  resistivity, charger  and  discharger 
     rates;  effect of specific gravity on  freezing  temperature 
     and resistivity of electrolytes.

     Knowledge  of methods of charging of batteries;  precautions 
     and procedures during charging; mixing and neutralization of 
     electrolytes; importance of ventilation of battery  compart-
     Knowledge  of  the inspections to determine  conditions  and 
     serviceability  of  batteries; common  battery  defects  and 
     their rectification.

                       3. Generators and Motors

     Knowledge  of the construction, principle of  operation  and 
     characteristics of DC and AC Generators and Motors.

     Knowledge  of the construction, principles of  operation  of 
     voltage regulators; and paralleling of generators.

     Detailed knowledge of the functional tests, adjustments  and 
     trouble shooting of generators and motors.

     Knowledge  of speed control and reversing the  direction  of 

                  4. Servomechanisms and Amplifiers 

     Knowledge     of    construction    and    principles     of 
     autotransformers, single and three phase transformers

     Knowledge  of  construction and principles of  operation  of 
     saturable  reactors  and magnetic  amplifiers;  bias;  phase 
     sensitive half wave and inputs and outputs, polarity  sensi-
     tive  inputs  and outputs, pushpull outputs and  effects  of 
     stage gains and cascading on time response.

     Knowledge of construction, principle and operation of servo-
     motors and rate generators; system response to  displacement 
     (position)  and rate (velocity) command signals; purpose  of 
     pullup  and  rate feedback signals; causes  of  hunting  and 
     methods of damping; troubleshooting of servomechanism.

                          5. Test Equipment

     Knowledge  of the construction, principle of operation,  use 
     and precautions to be observed for aircraft test equipments.

                       6. Bonding and Screening

     Knowledge  of purpose of bonding and shielding  and  differ-
     ence between the two, precaution, methods employed;  minimum 
     acceptable  standards for insulation and bonding; and  test-

     Detail knowledge of aircraft wiring system; procedure of 
     laying  of  electrical cables and precautions  to  be  taken 

                            7. Electronics

     Knowledge  of the basic principles of thermionics.

     Knowledge of properties of semiconductor materials.

     Knowledge  of  construction, symbols,  operation  and  anode 
     characteristics of vacuum and gas-filled tubes; knowledge of 
     their construction and application.

     Knowledge  of construction, symbols, doping process,  opera-
     tion,  application and characteristics of PNP and NPN  tran-
     sistors; comparison with vacuum tubes.

     Knowledge  of use and theory of oscillators and  multivibra-

     Knowledge  of symbols, truth tables and equivalent  circuits 
     for logic gates.

     Knowledge  of the terms, operation and application  of  Flip 
     Flop logic.

     Knowledge of the terms used, basic operation, interfacing of 
     the major components of a Computer.

     Knowledge of operation, use and types of Medium Scale  Inte-
     gration (MSI) Devices.

     Knowledge  of  the  types and operation  of  displays  (LED, 
     Liquid crystal etc.).

     Knowledge of CRTs and its application.

     Knowledge of functions performed and overall operation of  a 

     Knowledge  of  handling of microelectronic  circuit  devices 
     (Electrostatic Sensitive Devices (ESD)).

                          8. Aircraft System

     Knowledge of principle of operation, inspection and  trouble 
     shooting  of aircraft galley equipments,  aircraft  lights,  
     and  electrical  components  and  indicating  circuits  for 
     Landing Gear, Flap System and Airconditioning system etc.

     Knowledge  of operation and inspection of Aircraft Fire  and 
     Smoke Detection and Protection System.

                        9. Power Distribution

     Knowledge  of  electrical power  distribution  systems,  the 
     operation  and  construction  of  static  inverters,  rotary 
     inverters and transformer rectifier units.