TN 12th Question Paper 2026 Basic Automobile Engineering

FOR TN 12TH EXAM PREPARATION

TN 12th 2026
Question Paper · Basic
Automobile
Engineering
EXAM YEAR TYPE SUBJECT

TN 12th 2026 Question Paper Basic Automobile Engineering

Notes · Sample Papers · Previous Year Papers · Mock Tests

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No. of Printed Pages : 7
9085

!9085BasicAutoEng! £vÄ Gs
Register Number

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Part III — Vocational Subjects

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(Engineering and Technology Area)

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a BASIC AUTOMOBILE ENGINEERING - THEORY

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( / Tamil & English Version)

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 90

Time Allowed : 3.00 Hours ] [ Maximum Marks : 90

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Instructions : (1) Check the question paper for fairness of printing. If there is any lack of fairness,

inform the Hall Supervisor immediately.

(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

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Note : (i) Answer all the questions.

(ii) Choose the most appropriate answer from the given four alternatives and write

the option code and the corresponding answer.

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9085 2

1. \õø» Q›¨ AvP® QøhUS® Gßâß C¯UP ÁøP :
(A) •ß¦Ó Gßâß •ß \UPµ C¯UP®
(B) |õßS \UPµ C¯UP®
(C) •ß¦Ó Gßâß ¤ß \UPµ C¯UP®
(D) ¤ß¦Ó Gßâß ¤ß \UPµ C¯UP®
Which engine drive provides highest road grip ?

(a) Front engine front wheel drive

(b) Four wheel drive

(c) Front engine rear wheel drive

(d) Rear engine rear wheel drive

2. QÍma ø»Û[ G[S ö£õ¸zu¨£mi¸US® ?
(A) QÍma ¤÷Ímiß C¸ •P¨¤¾®
(B) ¤øÍ ÃÀ
(C) ¤µåº ¤÷Ím
(D) (B) ©ØÖ® (C)
Where is the clutch lining fixed ?

(a) Both edges of the clutch plate

(b) Fly Wheel

(c) Pressure Plate

(d) Both (b) and (c)

3. QÍma ¤÷Ím G¢u E÷»õPzuõÀ ö\´¯¨£mk C¸US® ?
(A) øhhõÛ¯® (B) A¾ªÛ¯® (C) ìjÀ (D) uõªµ®
Clutch plate is made up of which material ?

(a) Titanium (b) Aluminium (c) Steel (d) Copper

4. Q¯º £õUì C¯[S® Ai¨£øhz uzxÁ® :

(A) £õìPÀ Âv (B) Eµõ´Ä (C) ö|®¦÷PõÀ (D) £õµ÷h Âv
The basic principle involved in gear box operation is :

(a) Pascal’s Law (b) Friction (c) Lever (d) Faraday’s Law

5. Gßâß \Uvø¯ Q¯º£õUêÀ C¸¢x G¢u £õP® i£µß]¯¾US PhzxQÓx ?
(A) QÍma åõ¨m (B) QÍma
(C) ¦öµõ¨£À»º åõ¨m (D) ¤ß Aa_
Which component transmits the engine’s power from the gear box to the differential ?

(a) Clutch shaft (b) Clutch

(c) Propeller shaft (d) Rear axle

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 2 of 8

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6. möµm ÁøPPÒ ö£õxÁõP GzuøÚ ÁøP¨£k® ?
(A) 5 (B) (C) 2 4 (D) 3

Generally how many types of treads ?

(a) 5 (b) 2 (c) 4 (d) 3

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7. h¯›ß C¸ Âή¤¾® C¸¨£x __________.

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__________ is placed at both edges of the tyre.

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Ply rating (b) Bead (c) Tread (d) Car cass

8. uøh¨£møhPÒ (Brake linings) ö£õxÁõP G¢u¨ ö£õ¸ÍõÀ u¯õ›UP¨£kQÓx ?
(A) Áõº¨¤¸®¦ (B) Aìö£ìhõì
(C) A¾ªÛ¯U P»øÁ (D) Põ¨£º
Brake linings are generally made up of which material ?

(a) Cast iron (b) Asbestos

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(c) Aluminium alloy (d) Copper

9. øPz uøh°ß ÷ÁÖ ö£¯º :
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The other name of the Hand Brake is :

(a) Air Brake (b) Parking Brake

(c) Hydraulic Brake (d) Foot operated Brake

10. _¸ÒÂÀ G¨ö£õÊx \Uvø¯ ÷\ªUQÓx ?
(A) ›²® ö£õÊx (B) SÖS® ö£õÊx
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Energy is stored in the coil spring during :

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11. ÷Pìhº ÷Põn® __________ Áøµ Aø©UP¨£mi¸US® .

(A) •uÀ
108 128 (B) 28 •uÀ (C) •uÀ
38 58 68 (D) 78 •uÀ 88

The allowable caster angle is __________.

(a) 108 to 128 (b) 28 to 38 (c) 58 to 68 (d) 78 to 88

[ v¸¨¦P / Turn over

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12. ìi¯›[ åõ¨m ö\´¯¨£mi¸US® E÷»õP® :
(A) Áõº¨¤¸®¦ (B) A¾ªÛ¯®
(C) GLS C¸®¦ (D) {UPÀ
The steering shaft is made up of __________.

(a) Cast iron (b) Aluminium

(c) Steel (d) Nickel

13. ÁõPÚ Pmk©õÚzvÀ ÷©ØTk }[P»õP ÁõPÚ C¯UPzvØS ÷uøÁ¯õÚ
AøÚzx EÖ¨¦PÎß öuõS¨¤ß ö£¯º :

(A) uøh Aø©¨¦ (B) AizuÍ®
(C) Q¯º £õUì (D) QÍma
An Automobile without body is called as :

(a) Brake System (b) Chassis

(c) Gear box (d) Clutch

14. yska _¸øÍ __________ GßÖ® AøÇUP»õ® .

(A) ªßö£õÔU Pmøh (B) ìöh¨ A¨ iµõßì£õº©º
(C) ÷µõmhõº (D) ªßP»®
The ignition coil is also called as __________.

(a) Spark plug (b) Step up transformer

(c) Rotor (d) Battery

15. ªß\õµ Aø©¨¤ß Cu¯® Gߣx :

(A) CUÜ\ß Aø©¨¦ (B) ªßP»®
(C) ªß÷ÚØÓ Aø©¨¦ (D) ìhõºmi[ Aø©¨¦
The heart of electrical system is :

(a) Ignition system (b) Battery

(c) Charging system (d) Starting system

£Sv & II / PART - II

SÔ¨¦ : GøÁ÷¯Ý® £zx ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 28 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 10x3=30

Note : Answer any ten questions. Question No. 28 is compulsory.

16. E¸Ð® uøh GßÓõÀ GßÚ ?
What is meant by Rolling Resistance ?

17. QÍma ¤÷Ím Gߣx GßÚ ?
What is clutch plate ?

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 4 of 8

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18. KÁº iøµÆ (over drive) GßÓõÀ GßÚ ?
What is meant by over drive ?

19. i£µß]¯À ³Ûmiß ÷Áø»PøÍ GÊxP.
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Write the functions of the Differential Unit.

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20.
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What are the types of gear shifting mechanisms ?
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21. h¯›ß ÷Áø» GßÚ ?
What is the work of tyre ?

22. ÷»õk ÷µmi[ GßÓõÀ GßÚ ?
What is meant by Load Rating ?

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23. \º÷Áõ uøh £ØÔ GÊxP.
Write about Servo Brake.

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24. xøn 줛[ £ØÔ ]Ö SÔ¨¦ ÁøµP.
Write short notes on Helper spring.

25. Q[¤ß \õ´Ä & Áøµ¯ÖUPÄ®.
Define Kingpin inclination.

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26. ÷©ØTmiß £oPÒ ¯õøÁ ?

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State the functions of vehicle body.

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Write short notes on air conditioning.

28. ÁøÍÄ Bµ® ]Ö SÔ¨¦ ÁøµP.
Write short notes on Turning radius.

[ v¸¨¦P / Turn over

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9085 6

£Sv & III / PART - III

SÔ¨¦ : GøÁ÷¯Ý® I¢x ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 35 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 5x5=25

Note : Answer any five questions. Question No. 35 is compulsory.

29. QÍma ¤÷Ím £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw and mark the parts of clutch plate.

30. Põßìhßm ö©è Q¯º£õUêß {øÓ SøÓPÒ £ØÔ GÊxP.
Write about the advantages and disadvantages of constant mesh gear box.

31. ¦öµõ¨£À»º åõ¨iß £¯ßPÒ ¯õøÁ ?
What are the functions of propeller shaft ?

32. uøhUPmøh°ß Aø©¨ø£ £h® Áøµ¢x ÂÍUPÄ®.
Explain the construction of Brake Shoe with neat diagram.

33. PõØÖ AvºÄ uõ[Q°ß |ßø©PøÍU TÖP.
State the advantages of Air Suspension.

34. Põ°À CUÜ]¯ß Aø©¨¤ØS®, ÷©UÚm÷hõ CUÜ]¯ß Aø©¨¤ØS® EÒÍ
÷ÁÖ£õkPÒ ¯õøÁ ?
What are the differences between Coil Ignition System and Magneto Ignition System ?

35. AizuÍ Pmhø©¨¦ £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw and mark the parts of Chassis.

For more Question Papers, Sample Papers, Notes & Syllabus visit Page 6 of 8

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£Sv & IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20

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Note : Answer all the questions. Draw diagrams wherever necessary.

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(B) ¦öµõ¨£À»º åõ¨iÀ ö£õxÁõP HØ£k® £ÊxPÒ, {Áºzv ö\´²®
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•øÓø¯ ÂÁ›UPÄ®.
(a) Explain the construction and working principle of multiplate clutch.

OR

(b) Describe the common faults occurring in the propeller shaft and rectification methods

in detail.

37. (A) ö©UPõÛUPÀ ìi¯›[ ©ØÖ® £Áº ìi¯›[ BQ¯ÁØÔØQøh÷¯ EÒÍ
÷ÁÖ£õmøh AmhÁøn¨£kzxP. m
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Tabulate the difference between mechanical steering and power steering system.

a OR

(b) Briefly explain about important dimensions of a vehicle.

- o O o -

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