TN 11th Question Paper 2023 Basic Automobile Engineering

Tamil Nadu
State Board

2023
QUESTION
PAPER

No. of Printed Pages : 8
6785
!6785IstYearBasicAutomobileEngineering! £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.

[ v¸¨¦P / Turn over

6785 2

1. uø»UPõ¯zv¼¸¢x £õxPõUP £¯ß£kzu¨£k® \õuÚzvß ö£¯øµ SÔ¨¤kP.
(A) uø» PÁ\® (B) öuõ¨¤
(C) PõØÖ¨ø£ (D) ]Ó¨¦U Ps Psnõi
Mention the device which is used to protect Head Injury.

(a) Helmet (b) Cap

(c) Airbag (d) Special Eye glass

2. øímµõ¼U áõU G¢u uzxÁzvß Ai¨£øh°À C¯[SQÓx ?
(A) ö|®¦÷PõÀ uzxÁ® (B) £õìPÀ Âv
(C) £õµ÷h Âv (D) {³mhß Âv
Which principle is used in the Hydraulic Jack ?

(a) Lever principle (b) Pascal law

(c) Faraday law (d) Newton law

3. ^m÷hß Gs ‰»® G¢u G›ö£õ¸Îß uµzøuU PshÔ¯»õ® ?
(A) GÀ.¤.â (B) ö£m÷µõÀ (C) {»UP› (D) j\À
The quality of which fuel is known by cetane number ?

(a) LPG (b) Petrol (c) Coal (d) Diesel

4. hõ¨ öhm ö\ßh¸US® £õmh® öhm ö\ßh¸US® Cøh÷¯ EÒÍ yµ®
__________ .

(A) ]¼shº ÷£õº (B) E¢x Bµ®
(C) Qίµßì öPõÒÍÍÄ (D) Ãa_
The distance between Top Dead Centre and Bottom Dead Centre is __________.

(a) Cylinder Bore (b) Crank throw

(c) Clearance Volume (d) Stroke

3 6785

5. vÓ¨£õßPøÍ vÓUP¨ £¯ß£kÁx Gx ?
(A) Âø\¯õÒ ]À¾ (B) ÁøÍÁa_z usk
(C) Cøn¨¦z usk (D) ö|®¦¸Ò usk
Which is used to open the valves ?

(a) Fly wheel (b) Crank shaft

(c) Connecting rod (d) Cam shaft

6. ]¼shº ¤ÍõUQØS®, ]¼shº uø»US® Cøh÷¯ P]Ä HØ£hõ©À uk¨£x :
(A) hìm PÁº (B) P]Ä}UQ
(C) ¤ìhß Áøͯ® (D) B°À ^À
Which is used to prevent leakage between cylinder block and cylinder head ?

(a) Dust cover (b) Gasket

(c) Piston ring (d) Oil seal

7. ÁõPÚzvß ÷ÁPzøuU PnUQh EuÄÁx Gx ?
(A) Bº.¤.G®. ÷Pä (B) ì¥÷hõ«mhº
(C) ¤µèåº ÷Pä (D) K÷hõ«mhº
Which is used to calculate the speed of vehicle ?

(a) R.P.M. Gauge (b) Speedometer

(c) Pressure Gauge (d) Odometer

8. ÁõPÚzvÀ BØÓø» E¸ÁõUPz ÷uøÁ¯õÚ G›ö£õ¸øÍ ÷\ªzx øÁUP¨
£¯ß£k® \õuÚzvß ö£¯º GßÚ ?
(A) ÷µi÷¯mhº (B) ]¼shº
(C) G›ö£õ¸Ò öuõmi (D) ÁiPmi
Which is used to store the fuel needed to produce output energy in the vehicle ?

(a) Radiator (b) Cylinder

(c) Fuel tank (d) Filter

[ v¸¨¦P / Turn over

6785 4

9. GßâÛÀ ¤ìhß TDC &À C¸US® ÷£õx ]¼shº uø»US®, ¤ìhß uø»US®
Cøh¨£mh £Sv°ß ö£¯º GßÚ ?
(A) G›²® AøÓ (B) ö©õzu öPõÒÍÍÄ
(C) ¤ìhß CøhöÁÎ (D) ]¼shº ÷£õº
When the piston is at TDC, what is the name of the space between cylinder head
and piston head ?
(a) Combustion Chamber (b) Total Volume
(c) Piston Clearance (d) Cylinder Bore

10. Gßâß ªPÄ® AvP©õP Sκa] Aøh¯õ©À uk¨£x :
(A) SκÂUS® PõØÓõi (B) uspº £®¨
(C) öuº÷©õìhõm ÁõÀÄ (D) ÷µi÷¯mhº
__________ prevents the engine from over-cooling.
(a) Cooling Fan (b) Water Pump
(c) Thermostat valve (d) Radiator

11. Áõmhº £®¨ø£ C¯USÁx Gx ?
(A) Cøn¨¦z usk (B) Qµõ[U åõ¨m
(C) SκÂUS® PõØÓõi (D) ÷P® åõ¨m
Which operates the Water Pump ?
(a) Connecting rod (b) Crank shaft
(c) Cooling Fan (d) Cam shaft

12. Gsön´ £®¨¤¼¸¢x öÁÎ÷¯Ö® Gsön°ß AÊzu® :
(A) 6 kg/cm2 •uÀ 8 kg/cm2 (B) 2 kg/cm2 •uÀ 5 kg/cm2
(C) 8 kg/cm2 •uÀ 10 kg/cm2 (D) 3 kg/cm2 •uÀ 6 kg/cm2
The oil pressure level of outlet oil in the oil pump is :
(a) 6 kg/cm2 to 8 kg/cm2 (b) 2 kg/cm2 to 5 kg/cm2

(c) 8 kg/cm2 to 10 kg/cm2 (d) 3 kg/cm2 to 6 kg/cm2

5 6785

13. PõØÖ PÁºÚº __________ ‰»® C¯UP¨£kQÓx.

(A) Gßâß ÷ÁUSÁ® (B) PõØÖ AÊzuzvß

(C) ø©¯Â»US Âø\°ß (D) vµÁ AÊzuzvß

Pneumatic Governor is operated through :

(a) The engine Vacuum (b) Air Pressure

(c) Centrifugal Force (d) Hydraulic Pressure

14. ö£m÷µõÀ CßöáUåß •øÓø¯ •u¼À AÔ•P¨£kzv¯Áº ¯õº ?

(A) ¸hõÀ¨ j\À (B) Cµõ£ºm ÷£õì

(C) W.H. ÷á®ì (D) {U÷Põ»ì Bm÷hõ

Who initially introduced the Petrol Injection system ?

(a) Rudolf Diesel (b) Robert Bosch

(c) W.H. James (d) Nicolus Otto

15. ÁõPÚ £µõ©›¨¦ SÔ¨¦PÒ AøÚzx® Ah[Q¯ ¦zuPzvß ö£¯º GßÚ ?

(A) ÁõPÚ £Êx £iÁ® (B) ÁõPÚ SÔ¨÷£k

(C) ÁõPÚ Â£zx AÔUøP (D) £¯nzuõÒ

What is the name of the book which consists of all note of vehicle maintenance ?

(a) Vehicle Repair Form (b) Vehicle Log Book

(c) Vehicle Accident Report Form (d) Trip Sheet

[ v¸¨¦P / Turn over

6785 6

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

16. Ga\›UøP ]ßÚ[PÒ GßÓõÀ GßÚ ?
What is Cautionary signs ?

17. ÷ÁõÀm«mh›ß £¯ß GßÚ ?
What is the use of Voltmeter ?

18. ÷©ø\ P¸ÂPÎß ÁøPPøÍU TÖP.
State the types of Bench Tools.

19. vµÁ{ø» G›ö£õ¸ÒPÒ – ]Ö SÔ¨¦ ÁøµP.
Write short note on liquid fuels.

20. TDC ©ØÖ® BDC ]Ö SÔ¨¦ u¸P.
Give short notes on TDC and BDC.

21. ¤ìhÛß £¯ßPÒ ¯õøÁ ?
What are the uses of Piston ?

22. Cøn¨¦z usiß ÷Áø»PÒ ¯õøÁ ?
What are the functions of Connecting Rod ?

23. uõÁµ Gsön´ £ØÔ GÊxP.
Write about Vegetable oils.

24. ÷µi÷¯mhºPÎÀ GzuøÚ ÁøPPÒ EÒÍÚ ? AøÁ ¯õøÁ ?
How many types of Radiators are there ? What are they ?

25. S.A.E – GßÓõÀ GßÚ ?

What is meant by S.A.E ?

7 6785

26. MPFI &ß ‰ßÖ £õP[PÒ ¯õøÁ ?
What are the three parts of MPFI ?

27. ÁõPÚ £µõ©›¨¤À ¤ß£ØÓ¨£k® B´ÄPÒ ¯õøÁ ?
What are the inspection methods followed in vehicle maintenance ?

28. ÷PõÍ ÁiÁ AÊzu® ÂkÂUS® ÁõÀÄ C¯[S® ÂuzvøÚ GÊxP.
Write the working principle of Ball Type Pressure Relief Valve.

£Sv & III / PART - III
SÔ¨¦ : H÷uÝ® I¢x ÂÚõUPÐUS ©mk® Âøh¯ÎUPÄ®. ÂÚõ Gs 35 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 5x5=25
Note : Answer any five questions. Question No. 35 is compulsory.

29. ©øÓ•P P¸ÂPøÍ TÔ AÁØÔÀ H÷uÝ® JßÔøÚ £hzxhß ÂÁ›UPÄ®.
State Indirect tools and explain any one with sketch.

30. j\¼ß £s¦PÒ H÷uÝ® I¢vøÚ SÔ¨¤kP.
Mention any five properties of Diesel.

31. AÊzu ÂQu® – ÂÁ›UPÄ®.
Describe Compression Ratio.

32. EÒ G› GßâÛß •UQ¯ £õP[PÎÀ GøÁ÷¯Ý® £zvøÚ GÊv, AÁØÖÒ
GøÁ÷¯Ý® JßÔøÚ¨ £ØÔ ÂÁ›UPÄ®.
Write TEN important parts of an Internal Combustion Engine and explain any one
of them.

33. P»øÁU P»UQø¯ GzuøÚ Âu[PÎÀ ÁøP¨£kzu»õ® ? AøÁ ¯õøÁ ?
In how many ways, carburettor can be classified ? What are they ?

34. ö£m÷µõÀ CßöáUåß •øÓ°ß |ßø©PøÍ GÊxP.
Write the advantages of petrol injection system.

35. Gßâß AvP öÁ¨£® AøhÁuØPõÚ Põµn[PÒ I¢vøÚ SÔ¨¤mk, AÁØøÓ
{Áºzv ö\´²® •øÓPøÍU TÖP.

Mention five causes for overheating of Engine and state remedies for them.

[ v¸¨¦P / Turn over

6785 8

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20
Note : Answer all questions. Draw diagrams wherever necessary.

36. (A) £o©øÚ £õxPõ¨¦ ÂvPøÍ ÂÁ›UPÄ®.
AÀ»x
(B) Cµsk Ãa_ GßâÝUS® |õßS Ãa_ GßâÝUS® EÒÍ ÷ÁÖ£õkPøÍ
AmhÁøn¨£kzxP.
(a) Describe workshop Safety Rules.
OR
(b) Tabulate the differences between Two Stroke Engine and Four Stroke Engine.

37. (A) SκÂUS® Aø©¨¤À EÒÍ öuº÷©õìhõm ÁõÀøÁ £hzxhß
ÂÁ›UPÄ®.
AÀ»x
(B) B°À £®¨¤ß ÁøPPÎÀ H÷uÝ® JßÔøÚ £h® Áøµ¢x ÂÁ›UPÄ®.
(a) Describe with a neat sketch the Thermostat valve of cooling system.
OR
(b) Explain any one type of oil pump with a neat diagram.

-oOo-