AP Class 12 Model Paper 2027 Mechanical & Automobile Technician

PAPER I: WORKSHOP TECHNOLOGY (Theory)
TIME: 3 Hours Max. Marks: 50

1. Write the various types of lathe machine.
2. Define milling.
3. Write types of milling machine.
4. Write components of shaper.
5. Write types of slotting machine.
6. What are the advantages of quality control?
7. Draw Degreasing plant.
8. Write the equipment used for reconditioning of engine.
9. What is direct measuring instrument?
10. What are the constituents of paint?
ii) Each Question Carries 6 marks 5x6=30m
11. Draw a sketch of lathe and explain its parts.
12. Write comparison between CNC & Conventional machines.
13. Explain working principle of milling machine with neat sketch.
14. Explain briefly working principle of slotting machine.
15. List the quality system and element of quality control.
16. Explain De-Carbonizing methods.
17. Explain about safety precautions in Auto garage.
18. Explain painting procedure.

PAPER II: AUTO COMPONENTS AND OTHER SYSTEMS (Theory)
TIME: 3 Hours Max. Marks: 50

ii) Each question carries 2 marks 10x2= 20m

1. List out the various components of chassis.
2. What is the function of clutch?
3. Why is the gear box necessary in an automobile?
4. What is the use of steering linkage?
5. Define under steering and over steering.
6. Name the types of Universal Joints.
7. Write the requirements of brakes.
8. What are the functions of brakes?
9. What is the purpose of suspension system?
10. What is tyre?
ii) Each Question Carries 6 marks 5x6=30m
11. Explain loads acting on the chassis frame.
12. Explain the construction and working of sliding mesh gear box with sketch.
13. Draw the main components of steering system.
14. Explain about Hooke's type universal joint.
15. Explain about any one type of live rear axle with a neat sketch.
16. Explain mechanical brake with neat sketch.
17. Explain leaf spring with neat sketch.
18. Explain the construction of Disc wheel.

PAPER III: AUTO SERVICING AND MAINTENANCE (Theory)
TIME: 3 Hours Max. Marks: 50

1. Write various tools used in Garage.
2. Write types of maintenance.
3. Write the methods of lubrication of chassis.
4. What is meant by tuning in Engine maintenance?
5. What is transmission system?
6. Mention steering system.
7. What is the use of greasing?
8. Write advantages of Auto Electrical maintenance.
9. Write applications of fuse.
10. Draw any two Traffic signals.
Note: i) Answer any 5 Questions 5x6=30m
ii) Each Question Carries 6 marks
11. Draw the layout of service station.
12. Write & explain various types of servicing of motor vehicles.
13. Explain tuning of fuel system.
14. Explain tuning of ignition system.
15. Explain maintenance of clutch.
16. Briefly explain about steering system adjustment.
17. Explain checking of ignition system.
18. Explain necessity of vehicle registration.