TN 12th Question Paper 2022 Basic Automobile Engineering

No. of Printed Pages : 7
5985
!5985BasicAutoEng! £vÄ Gs
Register Number

Part III — Vocational Subjects
(Engineering and Technology Area)
Ai¨£øh uõÛ¯[Q Fºv ö£õÔ°¯À & P¸zv¯À
BASIC AUTOMOBILE ENGINEERING - THEORY
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

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

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP¨ £vÁõQ EÒÍuõ GߣuøÚ \›£õºzxU
öPõÒÍÄ®. Aa_¨£v¨¤À SøÓ°¸¨¤ß AøÓU PsPõo¨£õÍ›h®
EhÚi¯õPz öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.
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.

£Sv & I / PART - I
SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15

(ii) öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯z
÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®.
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.

5985 2

1. \õø» Q›¨ Av-P® QøhU-S® \Uv Phz-x® ÁøP Gx ?
(A) •ß-¦Ó Gß-âß •ß- \U-Pµ C¯U-P®
(B) |õßS \U-Pµ C¯U-P®
(C) •ß-¦Ó Gß-âß ¤ß \U-Pµ C¯U-P®
(D) ¤ß-¦Ó Gß-âß ¤ß \U-Pµ C¯U-P®
Which transmission system 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. G¢u ÁøP QÍma-]À, QÍma ö£hÀ ÷uøÁ-°Àø» ?
(A) ö\ßm›¤³-PÀ QÍma (B) J¸ umk QÍma
(C) h¯õ¨-µ® QÍma (D) £» umk QÍma
In which clutch, there is no clutch pedal ?
(a) Centrifugal Clutch (b) Single Plate Clutch
(c) Diaphragm Clutch (d) Multiplate Clutch

3. -QÍma G¢-uz uz-x-Áz-vÀ C¯[-S-Q-Óx ?
(A) Eµõ´Ä uz-x-Á® (B) ö|®-¦-÷PõÀ uz-x-Á®
(C) L£õ-µ÷h uz-x-Á® (D) £õì-PÀ uz-x-Á®
The clutch works on the principle of :
(a) Friction (b) Lever
(c) Faraday’s law (d) Pascal’s law

4. SøÓ¢u Cøh-öÁÎ öPõsh _Ç-¾® \Uv Phz-uU-T-i¯ Ch[-P-ÎÀ £¯ß-£-k-Á-x
__________.
(A) h¯º (B) £Ø-\U-P-µ®
(C) ©õìhº ]¼s-hº (D) åõ¨m
__________ is used in places where there is a small distance for transmitting the
rotational force.
(a) Tyre (b) Gears
(c) Master cylinder (d) Shaft

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5. G¢u ÁøP Q¯º-£õUì PÚ-µ-P Áõ-P-Ú[-P-ÐUS HØÓx ?
(A) ][U-÷µõ-ö©è Q¯º-£õUì (B) ]ø»-i[ ö©è Q¯º-£õUì
(C) G¤ø\U-ÎU Q¯º-£õUì (D) Põßì-hßm ö©è Q¯º-£õUì
Which type of Gearbox is suitable for heavy vehicles ?
(a) Synchromesh Gearbox (b) Sliding mesh Gearbox
(c) Epicyclic Gearbox (d) Constant mesh Gearbox

6. ¦öµõ¨-£À-»º åõ¨-iß C¸ •øÚ-P-ÎÀ ö£õ-¸z-u¨-£mk £¯ß-£-kz-u¨-£-k-Áx :
(A) ²ÛÁº-\À áõ-°sm (B) ¤ß Aa-_
(C) ÷åU-QÒ (D) Q[ ¤ß
Which one is connected at both ends of the propeller shaft ?
(a) Universal Joint (b) Rear axle
(c) Shackle (d) King pin

7. __________ BÚ-x ¦öµõ¨-£À-»º åõ¨m-iß }Í ÷ÁÖ-£õm-iØS Eu-Ä-Q-Ó-x.
(A) ªß-P-»® (B) ]¼¨ áõ-´sm
(C) ¤÷µU ]ì-h® (D) h¯º
__________ helps in varying the length of the propeller shaft.
(a) Battery (b) Slip Joint
(c) Brake system (d) Tyre

8. h¯-›ß ÁøP-PÒ __________.
(A) 4 (B) 2 (C) 5 (D) 3
Types of tyres are __________.
(a) 4 (b) 2 (c) 5 (d) 3

9. PÚ-µ-P Áõ-P-Ú[-P-ÎÀ G¢u ÁøP uøh Av-P-©õP £¯ß-£-kz-u¨-£-k-Q-Óx ?
(A) PõØÖ uøh (B) C¯¢-vµ uøh
(C) öÁØ-Ôh uøh (D) vµÁ uøh
Which type of brake is widely used in heavy vehicle ?
(a) Air brake (b) Mechanical brake

(c) Vacuum brake (d) Hydraulic brake

5985 4

10. Áõ-P-Ú[-P-Îß ÷ÁPzøu Pm-k-£-kzv £z-v-¼-¸¢-x Põ¨-£-uØS £¯ß-£-k-Áx :
(A) ø»m-i[ Aø©¨-¦ (B) uøh Aø©¨-¦
(C) CU-Ü-\ß Aø©¨-¦ (D) \ì-ö£ß-\ß Aø©¨-¦
Which system is used to control the vehicle speed and prevent from accident ?
(a) Lighting system (b) Brake system
(c) Ignition system (d) Suspension system

11. vµ-Á AvºÄ EÔg-]-¯õ-Úx G¢u uz-x-Áz-vß Ai¨-£-øh-°À C¯[-S-Q-Óx ?
(A) Eµõ´Ä uz-x-Á® (B) {³m-hß Âv
(C) £õì-PÀ Âv (D) ö|®-¦-÷PõÀ uz-x-Á®
Hydraulic damper is working based on the principle of :
(a) Principle of Friction (b) Newton Law
(c) Pascal Law (d) Principle of Lever

12. ìh¨ BU-]À Gz-uøÚ ÁøP¨-£-k® ?
(A) 5 (B) 2 (C) 6 (D) 4
Stub axles are classified into __________ types.
(a) 5 (b) 2 (c) 6 (d) 4

13. •ß- £ UP C¸ \U- P - µ [- P - Î ß ø©¯[- P - Ð US Cøh- ÷ ¯ EÒÍ Cøh- ö Á- Î ø¯
GÆ-ÁõÖ AøÇU-Qß-÷Óõ® ?
(A) uøµ-©mh Cøh-öÁ-Î (B) ÃÀ ÷£ì
(C) ö©õzu AP-»® (D) ÃÀ mµõU
The distance between the two front wheels is called as __________.
(a) Ground clearance (b) Wheel base
(c) Overall width (d) Wheel track

14. CÀ-¾-ª-÷Ú-\ß Gß-£-uß ö£õ-¸Ò :
(A) -C-¯U-P® (B) öÁÎa-\® (C) öÁ¨-£® (D) J¼
The illumination is related to __________.
(a) Motion (b) Light (c) Temperature (d) Sound

5 5985

15. ys-ka _¸-Îß ©Ø-öÓõ¸ ö£¯º __________.
(A) ªß-ö£õÔ Pm-øh (B) ìöh¨ A¨- i-µõßì£õº-©º
(C) ÷µõm-hõº (D) ªß-P-»®
The Ignition coil is also called as __________.
(a) Spark Plug (b) Step up Transformer
(c) Rotor (d) Battery

£Sv & II / PART - II
SÔ¨¦ : H÷u-Ý® £z-x ÂÚõUPÐUS Âøh¯ÎUPÄ®. ÂÚõ Gs 28 &US Pmhõ¯©õP
Âøh¯ÎUPÄ®. 10x3=30
Note : Answer any ten questions. Question No. 28 is Compulsory.
16. \Uv Phz-x® Aø©¨-¤ß ÁøP-P-øÍ GÊ-x-P.
Write about the types of transmission system.

17. QÍma – Áøµ-¯-ÖU-P-Ä®.
Define clutch.

18. Q¯º-£õU-]ß ÁøP-P-øÍ TÖ-P.
Write the types of Gearbox.

19. i£-µß-]-¯À íÄ-][ – Áøµ-¯-ÖU-P-Ä®.
Define differential housing.

20. SÔ¨¦ ÁøµP – ¤ß Aa-_.
Write short notes on rear axle.

21. h¯º £ØÔ SÔ¨¦ Áøµ-P.
Write notes on Tyre.

22. uøhø¯, C¯U-S® •øÓ-ø¯ ö£õ-¸zx GÆ-ÁõÖ ÁøP¨-£-kz-u¨-£-k-Q-Óx ?
Classify the types of brakes based on the application method.

23. £møh ÃÀ öuõ-S¨-¤ß ÁøP-PÒ ¯õøÁ ?
What are the types of leaf spring ?

5985 6

24. Áøµ-¯Ö – ìi-¯-›[ ÂQ-u®.
Define steering ratio.

25. ÃÀ Aø»ß-ö©sm-iÀ EÒÍ ÷Põ-n[-P-Îß ö£¯º-PøÍ TÖ-P.
List out the name of angles used in wheel alignment.

26. Áõ-P-Úz-vß ö©õzu AP-»® Gß-£x GuøÚ SÔU-S® ?
What is meant by vehicle’s overall width ?

27. ªß ÷uUQ ©Ø-Ö® £Qº-Â-°ß E£-÷¯õ-P[-PøÍ GÊ-x-P.
State the use of condenser and distributor.

28. ys-ka _¸Ò Gß-ÓõÀ GßÚ ? Auß ÁøP-PÒ ¯õøÁ ?
What is ignition coil and mention its types.

£Sv & III / PART - III
SÔ¨¦ : H÷u- 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. £» umk QÍma-]ß |ßø© ©Ø-Ö® wø©-PøÍ GÊ-x-P.
Write out the merits and demerits of multiplate clutch.

30. ¦öµõ¨-£À-»º åõ¨-iß £h® Áøµ¢x £õ-P[-PøÍ SÔU-P-Ä®.
Draw the propeller shaft and mention its parts.

31. i³¨ £ØÔ SÔ¨¦ Áøµ-P.
Write notes on Tube.

32. BØ-ÓÀ uøh-°ß ÁøP-PøÍ TÖ-P.
Write about the types of power brake.

33. AvºÄ EÔg] GuØ-S¨ £¯ß-£-k-Q-Óx ? Auß ÁøP-PÒ ¯õøÁ ?
What are the uses of shock absorber and write its types.

7 5985

34. ÃÀ Aø»ß-ö©sm \›-¯õP CÀ-»õ-©-¼-¸¢-uõÀ HØ-£-k® ÂøÍ-Ä-PÒ ¯õøÁ ?
State the problems that arise due to improper wheel alignment.

35. ìhõºm-i[ _Âma £h® Áøµ¢x ÂÍU-S-P.
Draw and explain starting switch.

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ-¯õÚ Ch[-P-ÎÀ £h®
Áøµ-P. 2x10=20
Note : Answer all the questions. Draw diagrams wherever necessary.
36. (A) •ß-¦Ó Gß-âß |õßS \U-Pµ C¯U-P® Aø©¨ø£ £h® Áøµ¢x ÂÁ-›U-P-Ä®.
AÀ»x
(B) ö\ßm-›-¤-³-PÀ QÍma £h® Áøµ¢x ÂÁ-›U-P-Ä®.
(a) Draw the line diagram of front engine four wheel drive and explain.
OR
(b) Draw and explain about centrifugal clutch.

37. (A) Põßì- h ßm- ö©è Q¯º- £ õUì Aø©¨¦ ©Ø- Ö ® C¯[- S ® Âuzøu
£hz-x-hß ÂÁ-›U-P-Ä®.
AÀ»x
(B) Áõ-P-Úz-vß Ai¨-£øh AÍ-Ä-PÒ £ØÔ ÂÁ-›-U-PÄ®.
(a) Explain the constant mesh gearbox construction and working principle with
neat sketch.
OR
(b) Explain about important dimensions of a vehicle.

-o0o-