Rr322404-automotive-electrical-and-autotronics

Set No. 1

Code No: RR322404

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 AUTOMOTIVE ELECTRICAL AND AUTOTRONICS (Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Discuss in detail the comparison between Lead-Acid cells and Alkaline cells. (b) Name the different methods of battery charging. Explain any one of them. [8+8] 2. Describe the various of the troubles most likely to occur in the ignition system of an automobile engine. Suggest also appropriate remedies in each case. [16] 3. (a) With the help of neat diagram, explain the common rail system. (b) List the various components of a electronic injection system and explain their functions briefly. [8+8] 4. (a) What is the function of a car’s generator? (b) What are the major differences between dc and ac generator? (c) Explain why the voltage of a car’s generator has to be controlled.

[4+6+6]

5. (a) Explain the design of high voltage automotive cables. (b) Draw the wiring diagram for automotive wiring systems.

[8+8]

6. (a) Explain the principle of automobile illumination. (b) Explain with a neat diagram the operation of odometer.

[8+8]

7. (a) Given that (B2F8)16 = (45816) b . Determine the value of b. (b) Subtract (1011)2 from (1100)2 using the 2’s complement method. Also show direct subtraction for comparison. [8+8] 8. (a) What do you understand by universal gate? (b) Draw the circuit diagram of master-slave flip-flop. Explain how it avoids racearound condition. [8+8] ⋆⋆⋆⋆⋆

1 of 1

Set No. 2

Code No: RR322404

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 AUTOMOTIVE ELECTRICAL AND AUTOTRONICS (Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) What do you understand by recharging of a battery? (b) What are the battery troubles and their remedies?

[4+12]

2. (a) Discuss in detail the comparison the battery and magneto ignition systems. (b) Explain the requirements of contact breakers and discuss in detail its various types. [8+8] 3. (a) What are the various sensors used in electronic fuel injection system? (b) What is a common rail fuel injection system? Explain.

[8+8]

4. (a) Why is a generator required in the electrical system of a car? (b) State the purpose of the voltage regulator. (c) Explain briefly how a cut-out relay is used in the battery generator circuit. [4+4+8] 5. What is the difference between the earth return and insulated return? Explain the purpose of providing earth return and insulated return systems. [16] 6. (a) Explain the principle of automobile illumination. (b) Explain with a neat diagram the operation of odometer.

[8+8]

7. (a) Given that (B2F8)16 = (45816) b . Determine the value of b. (b) Subtract (1011)2 from (1100)2 using the 2’s complement method. Also show direct subtraction for comparison. [8+8] 8. (a) What is J-K flip-flop? What are its advantages over S-R flip-flop? (b) What is a shift register? Discuss its types and applications. ⋆⋆⋆⋆⋆

1 of 1

[8+8]

Set No. 3

Code No: RR322404

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 AUTOMOTIVE ELECTRICAL AND AUTOTRONICS (Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. What are the different types of batteries?Briefly describe the construction of a lead-acid battery. [2+14] 2. (a) Explain briefly with a neat sketch “THE TRANSISTORIZED COIL IGNITION ”(TCI) system. (b) Write a short note on combined centrifugal and vacuum advance mechanism. [8+8] 3. (a) What are the various sensors used in electronic fuel injection system? (b) What is a common rail fuel injection system? Explain.

[8+8]

4. Discuss the construction and working of a combined vibrating voltage and current regulator. How is the temperature compensation achieved in such a regulator?[16] 5. (a) Explain the design of high voltage automotive cables. (b) Draw the wiring diagram for automotive wiring systems.

[8+8]

6. Explain with a neat diagram the operation of a temperature gauge used in automobile system. [16] 7. (a) Convert the following numbers. i. (13.375)10 to base 8 and base 2 ii. (3589)10 to base 16 and base 8 (b) Multiply the binary numbers 1011.10 and 1110.01

[8+8]

8. Describe how a shift register may be employed to receive data with the mostsignificant bit first and later transmit data with least-significant bit last. [16] ⋆⋆⋆⋆⋆

1 of 1

Set No. 4

Code No: RR322404

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 AUTOMOTIVE ELECTRICAL AND AUTOTRONICS (Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. What are the different troubles experienced in an automotive battery? Discuss their causes, effect on the battery and suggest suitable remidies for them. [16] 2. Discuss in detail the requirements of a good spark plug. Explain with the help of a sketch the construction of a spark plug, describing in particular the materials used for its different parts. [16] 3. (a) With the help of neat diagram, explain the common rail system. (b) List the various components of a electronic injection system and explain their functions briefly. [8+8] 4. (a) What is the purpose of cutout relay? Explain briefly its construction and operation. (b) Why AC alternators are very popular compared to DC generator.

[8+8]

5. With neat sketches, explain the six volt and twelve volt auto electrical systems. [16] 6. Discuss briefly about different types of speedometers used in automobile systems. [16] 7. (a) Obtain the 10’s complement of the following eight-digit decimal numbers: i. ii. iii. iv.

23900 00980100 100000 000000

(b) Explain the 9’s complement and 10’s complement with examples. 8. Explain the working of a ripple counter. What are its disadvantages? ⋆⋆⋆⋆⋆

1 of 1

[16]