B.E/B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2012
Fifth semester
Automobile engineering
AT 2302/AU52/1O122 AU 504 – AUTOMOTIVE ELECTRICAL AND ELECTRONICS
(Regulation 2008)
Answer All Questions
PART A-(10*2=20 marks)
1. What is reserve capacity of a battery?
2. Write the reaction takes place during discharging and charging of nickel metal hydride cell.
3. What is the purpose of ballast resistor?
4. How do you control the generator output in automobiles?
5. List the factor affecting the establishment of arc across the spark plug air gap.
6. What are the factors that affect the life of a spark plug?
7. What is the function of a pulse generator?
8. Write the merits of distributor less ignition system.
9. What do you mean by aiming of head light?
10. Mention the significance of colour codes in an automobile.
PART B-(5*16=80 marks)
11. (a) Discuss various battery parameters in detail. Also give nominal battery parameters for any four types of any four types of automotive batteries.
Or
(b) Explain different battery charging types and state of charge methods.
12. (a) Describe the construction and working of overrunning clutch type starting drive. What is the function of solenoid switch in a pre-engaged starter motor
Or
(b) Explain in detail the procedure adopted to test the working of a generator regulator system. Discuss the common faults occur in generators.
13. (a) Explain the components of a magneto ignition system in detail. Mention the advantages of magneto ignition system over battery coil ignition system.
Or
(b) Explain the mechanism of centrifugal and vacuum advance methods. Justify the need for combined method.
14. (a) Explain the components of programmed ignition system with a lay out
Or
(b) How does a breaker -triggered system work? Explain the working of capacity discharge ignition system with its advantages.
15. (a) Explain the operation and principle of fuel level indicator ,oil lever indicator, and coolant temperature indicator.
Or
(b) Explain the construction and working of wiper motor. Also explain the how an electric horn works.