TN 11th Question Paper 2022 Basic Automobile Engineering

No. of Printed Pages : 8
6085
!6085IstYearBasicAutomobileEngineering! £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.

6085 2

1. öuõ-È»
- õͺPÒ ©Ø-Ö® E£-Pµ- n
- [-Pø
- Í Â£z-v¼
- ¸
- ¢x £õ-xP
- õUP Eu-Ä® Âv-•ø
- Ó-PÒ :
(A) £õ-x-Põ¨¦ Âv-•-øÓ-PÒ
(B) Áõ-PÚ £õ-x-Põ¨¦ Âv-•-øÓ-PÒ
(C) \õø» Âv-•-øÓ-PÒ
(D) •u-¾-u-Â
The rules that ensures the safety of employees and equipments from accident :
(a) Safety rules
(b) Vehicle safety rules
(c) Road rules
(d) First aid

2. J¸ öuõ-È-»õÎ £o-¯õØ-Ö® ÷Áø» ÷|µ® Av-P-£m-\® Gz-uøÚ ©o ÷|µz-vØS
ªPõ-©À C¸UP ÷Ás-k® ?
(A) 6 ©o-÷|-µ® (B) 2 ©o-÷|-µ®
(C) 8 ©o-÷|-µ® (D) 4 ©o÷|µ®
Maximum working hours for an operator should not exceed :
(a) 6 hours (b) 2 hours
(c) 8 hours (d) 4 hours

3. øím-÷µõ «m-hº ‰»® AÍU-P¨-£-k-Áx :
(A) ªß-\õ-µ®
(B) ªß AÊz-u®
(C) £Áº
(D) ÷£m-h-›-°À EÒÍ ªß-P-hzx vµ-Áz-vß Ahºzv
Which is measured by Hydrometer ?
(a) Current
(b) Voltage
(c) Power
(d) Density of Electrolyte

4. xøÍ-°-k® C¯¢-v-µ® Gz-uøÚ ÁøP¨-£-k® ?
(A) |õß-S (B) Cµsk (C) I¢-x (D) ‰ßÖ
How many types of Drilling Machines are used ?

(a) Four (b) Two (c) Five (d) Three

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5. BU-÷hß Gs ‰»® G¢u G›-ö£õ-¸-Îß uµzøu AÔ-¯-»õ® ?
(A) GÀ.-¤.â (B) ö£m-÷µõÀ (C) ^.Gß.-â. (D) j\À
The quality of which fuel is determined by octane number ?
(a) LPG (b) Petrol (c) CNG (d) Diesel

6. ö©z-u-Úõ-¼ß ©Ö-ö£-¯º :
(A) £÷¯õ- j-\À (B) Gz-u-ÚõÀ
(C) ©µ FµÀ (D) Gz-vÀ BÀ-P-íõÀ
The another name of Methanol :
(a) Bio Diesel (b) Ethanol
(c) Wood alcohol (d) Ethyl alcohol

7. Ãa_ Gß-£x :
(A) E¢x Bµz-vÀ £õv
(B) TDC &U-S® BDC &U-S® Cøh¨-£mh öuõ-ø»Ä
(C) Ãa-]ß £õv AÍÄ
(D) E¢x Bµz-vß \©-©õÚ öuõ-ø»Ä
Stroke is :
(a) Half of the crank throw
(b) Distance between TDC and BDC
(c) Half of the stroke length
(d) Equal to crank throw

8. ]¼s-hº uø»-ø¯ u¯õ-›U-P¨ £¯ß-£-k® E÷»õ-P® :
(A) ¤z-uøÍ AÀ-»x ìjÀ
(B) ÷Pìm A¯ºß AÀ-»x A¾-ª-Û-¯®
(C) ÷Pìm A¯ºß AÀ-»x ìjÀ
(D) Q÷µ ÷Pìm A¯ºß AÀ-»x A¾-ª-Û-¯® A»õ´
Which material is used for manufacturing Cylinder Head ?
(a) Brass or Steel
(b) Cast iron or Aluminium
(c) Cast iron or Steel
(d) Grey cast iron or Aluminium alloy

6085 4

9. Gz-uøÚ ÁøP-¯õÚ Fm-k® £®-¦-PÒ j\À Gß-â-ÛÀ £¯ß-£-kz-u¨-£-k-Qß-ÓÚ ?

(A) |õß-S (B) Cµsk (C) I¢-x (D) ‰ßÖ
How many types of feed pumps are used in diesel engines ?

(a) Four (b) Two (c) Five (d) Three

10. øhµUm Sκ-ÂU-S® •øÓ-°ß ©Ø-öÓõ¸ ö£¯º ?

(A) AÊz-u® (B) |õs ›m-hºß

(C) öuº-÷©õ-ø\-£ß (D) £®¨ \º-S-÷»-åß
The another name of Direct Cooling System :

(a) Pressure (b) Non-Return

(c) Thermosyphon (d) Pump circulation

11. Sκa-]-³m-k® }º EøÓ¢x Âhõ-©À C¸UP }¸-hß P»U-P¨-£-k® ÷Áv¨-ö£õ-¸Ò
¯õx ?

(A) «z-÷uß (B) Gz-u-ÚõÀ (C) ö©z-u-ÚõÀ (D) A]m-÷hõß
Which chemical is used to prevent freezing of cooling water ?

(a) Methane (b) Ethanol (c) Methanol (d) Acetone

12. G¢u ÁøP-¯õÚ Áõ-PÚ
- z-vÀ ö£m-µõ-°À ¿¨-›÷
- P-\ß ]ìh® £¯-ߣ-kz-u¨-£k
- Q
- Ó
- x?

(A) C¸ \U-Pµ Áõ-P-Ú® (B) PÚ-µ-P Áõ-P-Ú®

(C) |õßS \U-Pµ Áõ-P-Ú® (D) Bm÷hõ ›U-åõ
In which types of vehicle, Petroil Lubrication System is used ?

(a) Two wheeler (b) Heavy vehicle

(c) Four wheeler (d) Auto rickshaw

5 6085
13. uõ-Áµ Gs-ön´US Euõ-µ-n® :
(A) j\À (B) ö£m-÷µõ-¼-¯®
(C) Pή-¦ (D) B©-nUS Gs-ön´
The example of vegetable oil :
(a) Diesel (b) Petroleum
(c) Grease (d) Castor oil

14. AvP uµ-•ÒÍ P»-øÁ-°ß ÂQ-u® :
(A) 14 : 1 (B) 18 : 1 (C) 10 : 1 (D) 16 : 1
Rich Mixture Ratio is :
(a) 14 : 1 (b) 18 : 1 (c) 10 : 1 (d) 16 : 1

15. B´Ä __________ ÁøP¨-£-k®.
(A) ‰ßÖ (B) I¢x (C) |õß-S (D) Cµsk
The types of Inspection are :
(a) Three (b) Five (c) Four (d) Two

£Sv & II / PART - II
SÔ¨¦ : H÷u-Ý® £zx ÂÚõUPÐUS ©m-k® Âøh¯ÎUPÄ®. ÂÚõ Gs 28 &US
Pmhõ¯® Âøh¯ÎUPÄ®. 10x3=30
Note : Answer any ten questions. Question No. 28 is compulsory.

16. Áõ-P-Úz-vÀ £¯ß-£-k® £»-Â-u-©õÚ •ß-öÚa-\-›UøP ©õ-Û-PÒ ¯õøÁ ?
What are the various precautionary alarms used in the vehicle ?

17. PõØ-Ö¨ø£ – ]Ö SÔ¨¦ Áøµ-P.
Write short notes on an Air bag.

18. PõØ-Ó-Êzv Gß-ÓõÀ GßÚ ? Auß £¯ß-PøÍ GÊ-x-P.
What is Air Compressor ? Write its uses.

6085 6

19. BU-÷hß Gs – Áøµ-¯-ÖU-P-Ä®.
Define Octane Number.

20. Gß-âß Gß-ÓõÀ GßÚ ?
What is meant by Engine ?

21. P]Ä }U-Q-°ß £¯ß ¯õx ?
What is the purpose of Gasket ?

22. EÒ-öÍ› Gß-â-ÛÀ EÒÍ •U-Q¯ £õ-P[-PøÍ GÊ-x-P.
Write the important parts of IC Engines.

23. |õ-]À ÁøP-PÒ ¯õøÁ ?
Write the types of Nozzles.

24. }›ÚõÀ Sκ-ÂU-S® •øÓ-°À EÒÍ £õ-P[-PøÍ GÊ-x-P.
Write the parts of Water Cooling System.

25. }›-ÚõÀ Sκ-ÂU-S® Aø©¨-¤ß {øÓ-PÒ H÷u-Ý® ‰ß-ÔøÚ TÖ-P.
Write any three advantages of Water Cooling System.

26. E¯-Â-k® •øÓ-°ß ÁøP-PÒ ¯õøÁ ?
What are the types of Lubrication System ?

27. Áõ-P-Ú¨ £µõ-©-›¨-¤À B´Ä ö\´¯ ÷Ás-i¯ •øÓ-PÒ ¯õøÁ ?
What are the types of inspection methods followed in vehicle maintenance ?

28. SøÓ¢u uµ-•ÒÍ P»-øÁ Gß-ÓõÀ GßÚ ?

What is meant by Lean Mixture ?

7 6085
£Sv & III / PART - III
SÔ¨¦ : H÷u-Ý® I¢x ÂÚõUPÐUS ©m-k® Âøh¯ÎUPÄ®. ÂÚõ Gs 35 &US
Pmhõ¯® Âøh¯ÎUPÄ®. 5x5=25

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

29. ÷|µ-i P¸Â-PÒ GøÁ-÷¯-Ý® I¢-vøÚ GÊv AÁØ-Ôß £¯ß-PøÍ ÂÍU-S-P.
Write any five Direct Tools and explain its function.

30. AÊz-u¨-£mh C¯ØøP G›-Áõ² (CNG) Gß-ÓõÀ GßÚ ? Auß |ß-ø©-PÒ ¯õøÁ ?
What is meant by Compressed Natural Gas (CNG) ? Mention the advantages of
CNG.

31. Gß-âß öuõ-ÈÀ~m£ ÂÁ-µ[-PÒ H÷u-Ý® I¢-vøÚ GÊ-x-P.
Write any five technical specification of the Engine.

32. ÷uøÁ-¯ØÓ ©õ-_-P-Ю Au-ÚõÀ HØ-£-k® £õ-v¨-¦-P-øÍ-²® Am-h-Á-øn¨-£-kz-x-P.
Tabulate the Effects of Pollutants.

33. E¯-Â-k® Aø©¨-¤ß AÁ-]-¯® ¯õx ?
What are the necessities of the Lubrication ?

34. G›-ö£õ-¸Ò ö\¾z-x® •øÓ-°ø
- Ú TÔ AÁØ-ÔÀ H÷u-Ý® Cµs-iøÚ ÂÁ-›U-PÄ
- ®.
What are the types of fuel supply system ? Explain any two of them.

35. £¯-nz-vØS ¤¢-øu¯ B´Ä £ØÔ ÂÁ-›U-P-Ä®.
Explain about post trip inspection.

6085 8

£Sv & IV / PART - IV

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

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

36. (A) C¯¢-vµ £õ-x-Põ¨¦ Âv-•-øÓ-PøÍ GÊ-x-P.

AÀ»x

(B) |õßS Ãa_ j\À Gß-âß C¯[-S® Âuz-øu¨ £h® Áøµ¢x ÂÁ-›U-P-Ä®.
(a) Explain the points on Machine Safety Precaution.

OR

(b) Draw a neat sketch of Four Stroke Diesel Engine and explain the working
principle.

37. (A) PõØ-Ô-ÚõÀ Sκ-ÂU-S® •øÓ-ø¯ £h® Áøµ¢x ÂÁ-›U-P-Ä®.

AÀ»x

(B) E¯-Â-k® ö£õ-¸Ò-P-Îß ÁøP-P-øÍ TÔ AÁØ-øÓ¨ £ØÔ ÂÁ-›U-P-Ä®.
(a) Explain Air Cooling System with neat sketch.

OR

(b) Write the types of Lubricants and explain them.

-o0o-