Fatima Michael College of Engineering & Technology
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1 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 color 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. (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 (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. (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 (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. (b)explain the construction and working of wiper motor. Also explain the how an electric horn works.
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4 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 anyfour types of any four types of automotive batteries. (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 (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. (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 (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 lev er indicator, and coolant temperature indicator. (b) Explain the construction and working of wiper motor. Also explain the how an electric horn works.
5 B.E AUTO Title of the Paper:Automotive Electrical and Electronics PART - A (10 x 2 = 20) Answer ALL the Questions 1. Write the chemical reaction takes place in a lead acid battery while charging and discharging? 2. Write any three maintenance of a lead acid battery? 3. Explain the working principle of horns? 4. What are the stages of wiper motor? 5. What are the various types of starting devices? 6. What are the defects takes place in starting system? 7. Write any two differences between a generator and alternator? 8. What is the function of voltage regulator? 9. What are the various sensors used in an automobile? 10. Explain engine speed sensor? PART B (5 x 12 = 60) Answer All the Questions 11. With a need sketch explain the construction and working principle of lead acid battery? (or) 12. Explain about the constructional details of the following (a) Head Lamp (b) Turn signals (c) Wiper system 13. What are the different components of starter motor and Explain their functions? (or) 14. In detail explain the various types of starter drive? 15. Explain the construction and working of alternator generating system? (or)
6 16. Draw a circuit layout of voltage and current regulator and discuss in detail? 17. Write about the various components of and electronic engine management system? (or) 18. State the purpose of keyless entry and anti-theft system list the main components used in both systems? 19. With the aid of neat sketch explain the construction and theory of operation of a typical exhaust oxygen sensor used in vehicle? (or) 20. Sketch and explain the working of solenoids and stepper motor as actuators in vehicle?
7 PART A 1. Give the effect of overcharging and under charging of battery. 2. Why are battery cells connected in series? 3. State the effect of loose and tight generator belt. 4. State four advantages of an alternator over d.c. generator. 5. State the function of fuse. 6. What do you mean by headlight dazzling? 7. What do you mean by active and passive sensor? 8. Briefly explain the principle of coolant temperature sensor. 9. Is ECU can be inter changed between two engines? Justify. 10. What do you mean by wiring harness? PART B-(5*16=80 Marks) 11. (a) (i) Explain with the aid of neat sketch, the principle, construction and working principle Of lead acid battery. (ii) Discuss any three problem caused in a battery along with possible cause and remedial measures. (b) (i) Explain with the aid of neat sketch, the principle, construction and working principle of Alkaline battery. 12. (a) (i) Explain the circuit diagram of charging system using D.C generator and functions of each component. (ii) Explain the construction and working of Bendix drive. (b) (i) Explain the construction and working of Cut-out relay. 13. (a) Explain the working of electric horn, wirer system and Trafficator. (b) Explain Multiplexing and Demultiplexing with an application in automobile. 14. (a) Explain the working of Oxygen sensor, hot wire mass air flow sensor with simple sketch. (b) Discuss the various actuators with necessary sketch and its application in automobile. 15. (a) (i) With the aid of block diagram, explain the various components of Electronic Engi ne Control Module. (ii) With the aid of block diagram, explain the various components of Electronic Powertrain Control Module. (b) Write short notes on the following (i) PID control (ii) Formulation of Engine map (iii) Onboard diagnostics system.
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