TN 11th Question Paper 2024 Basic Automobile Engineering

TN PUBLIC EXAM

QUESTION
PAPER
2024

No. of Printed Pages : 7
7685
!7685IstYearBasicAutomobileEngineering! £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 |õßS ©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

7685 2

1. J¸ öuõÈ»õÎ £o¯õØÖ® ÷Áø» ÷|µ® AvP£m\® GzuøÚ ©o ÷|µzvØS
ªPõ©À C¸UP ÷Ásk® ?
(A) 8 ©o ÷|µ® (B) 4 ©o ÷|µ®
(C) 10 ©o ÷|µ® (-D) 6 ©o ÷|µ®
Maximum working hour for an operator should not exceed :
(a) 8 hours (b) 4 hours
(c) 10 hours (d) 6 hours

2. ö£m÷µõÀ GßâÛÀ w¨ö£õÔ°ß ußø©ø¯ ÷\õuøÚ ö\´¯¨ £¯ß£k®
P¸Â :
(A) ÷£mh› öhìmhº (B) ì£õºU ¤ÍU öhìmhº
(C) J÷hõ «mhº (-D) ö\À öhìmhº
The device used to check the spark intensity in petrol engine is :
(a) Battery tester (b) Spark plug tester
(c) Odometer (d) Cell tester

3. Bm÷hõö©õø£À GßâÛÀ vh{ø» G›ö£õ¸øÍ Hß £¯ß£kzxÁvÀø» ?
(A) SøÓ¢u öÁ¨£ BØÓÀ ©ØÖ® AvP AÍÄ \õ®£À ©ØÖ® ¦øP°øÚ
öÁΰkÁuõÀ
(B) G›ö£õ¸Ò umk¨£õk
(C) £µõ©›¨£x PiÚ®
(-D) G›ö£õ¸Ò Âø» AvP®
Why the solid fuels are not used in Automobile Engines ?
(a) Low heat energy and emission of more ash and smoke
(b) Scarcity of fuel
(c) Difficult to maintain
(d) Higher fuel cost

4. ¦øP Ási°À EÒÍ }µõ Gßâß G¢u ÁøPø¯a \õº¢ux ?
(A) Gvº ]¼shº Gßâß (B) EÒöÍ› Gßâß
(C) ©øµß Gßâß (-D) öÁÎö¯› Gßâß
Which type of steam engine is used in locomotive ?
(a) Opposed cylinder engine (b) Internal combustion engine
(c) Marine engine (d) External combustion engine

3 7685
5. ]¼shº ¤ÍõU u¯õ›UP¨ £¯ß£k® E÷»õP® :
(A) ¤zuøÍ (B) Q÷µ ÷Pìm A¯ºß
(C) ìjÀ (-D) ÷Pìm A¯ºß
The metal used for manufacturing cylinder block is :
(a) Brass (b) Grey cast iron
(c) Steel (d) Cast iron

6. GzuøÚ ÁøP¯õÚ ø\ö»ß\ºPÒ EÒ G› GßâßPÎÀ £¯ß£kzu¨£k&
QßÓÚ ?
(A) I¢x (B) Cµsk (C) Gmk (-D) |õßS
How many types of silencers are used in I.C. engines ?
(a) Five (b) Two (c) Eight (d) Four

7. ÷µi÷¯mh›À }›ß AÍÄ SøÓ¢uõÀ HØ£k® ÂøÍÄ ¯õx ?
(A) uspº £®¨¤À AvP \¨u® HØ£k®
(B) Gßâß AvP öÁ¨£©øh²®
(C) G›ö£õ¸Ò SøÓÁõP ö\»ÁõS®
(-D) L÷£ß ö£Àm ÂøµÂÀ ÷u´Áøh²®
What is the effect if there is low water level in the radiator ?
(a) More noise in water pump
(b) Engine is overheated
(c) Less fuel consumption
(d) Fan belt wear quickly

8. uØPõ» GßâßPÎÀ G¢u ÁøP E¯Âk® •øÓ AvP©õP £¯ß£kQÓx ?
(A) öuÎUS® •øÓ
(B) ö£mµõ°À •øÓ
(C) J¸[Qøn¢u öuÎUS® ©ØÖ® AÊzx® •øÓ
(-D) AÊzx® •øÓ
Which lubrication system is mostly used in engines now a days ?
(a) Splash system
(b) Petroil system
(c) Combined Splash and Pressure system
(d) Pressure lubrication system

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7685 4

9. J¸ Q÷»õ Qµõ® ö£m÷µõø» •Êø©¯õP G›¨£uØS GzuøÚ Q÷»õQµõ® PõØÖ
÷uøÁ¨£kQÓx ?
(A) 15 Q.Q. (B) 4 Q.Q. (C) 8 Q.Q. (-D) 10 Q.Q.
How many kilogram of air is needed for the complete combustion of 1 kg of petrol ?
(a) 15 kg (b) 4 kg (c) 8 kg (d) 10 kg

10. GßâÛÀ EÒÍ •UQ¯ £õP[PøÍa ÷\õvzx ÷u´Áøh¢u £õP[PøÍ ©õØÔ
AÀ»x \› ö\´x «sk® C¯US® ö\¯À•øÓ°ß ö£¯º GßÚ ?
(A) ÁõPÚ ÷\õuøÚ
(B) Gßâß vÓøÚ E¯ºzxuÀ
(C) Põº¦÷µmhº ÷\õuøÚ ö\´uÀ
(-D) GßâøÚ ÷\õuøÚ ö\´uÀ
Name the process of inspecting, servicing, replacing the worn out parts of engine and operating
the same again.
(a) vehicle inspection
(b) engine tune up
(c) carburetor check up
(d) engine check up

11. •u¾u°øÚ öuõh[Q¯Áº ¯õº ?
(A) ¹hõÀ¨ j\À (B) S. ©õºU
(C) £õìPÀ (-D) Cµõ£ºm £õè
Who initiated First Aid ?
(a) Rudolph Diesel (b) S. Mark
(c) Pascal (d) Robert Bosch

12. |® |õmiÀ ÷£õUSÁµzvØPõP ö£›x® £¯ß£kzu¨£k® ÁõPÚ® Gx ?
(A) ÷Pì ÁõPÚ® (B) ö£m÷µõÀ ÁõPÚ®
(C) ªß\õµ ÁõPÚ® (-D) j\À ÁõPÚ®
Which vehicle is widely used for transportation in our country ?
(a) Gas vehicle (b) Petrol vehicle
(c) Electricity vehicle (d) Diesel vehicle

13. Põº¦÷µmh›À EÒÍ vµõmiÀ ÁõÀÄ GÆÁõÖ C¯UP¨£kQÓx ?
(A) ö£m÷µõÀ £®¨¤ß ‰»® (B) öÁØÔhzvß ‰»®
(C) ÷\õU i³¨ (-D) BU]÷»mhº ö£hÀ ‰»®
How the Throttle Valve in Carburetor is operated ?
(a) By petrol pump (b) By vacuum
(c) By choke tube (d) By accelerator pedal

5 7685
14. Sκa]³mk® }º EøÓ¢x Âhõ©À C¸UP }¸hß P»UP¨£k® ÷Áv¨ ö£õ¸Ò
¯õx ?
(A) «z÷uß QøÍUPõÀ (B) ö©zvÀ BÀPíõÀ
(C) ö£m÷µõÀ (-D) A]m÷hõß
Which chemical is added with water to prevent freezing of cooling water ?
(a) Methane glycol (b) Methyl alcohol
(c) Petrol (d) Acetone

15. ö£õxÁõP GßâßPÎÀ £¯ß£kzu¨£k® E¯Ä ö£õ¸ÒPÎß ÁøPPÒ
GzuøÚ ?
(A) |õßS (B) Cµsk (C) I¢x (-D) ‰ßÖ
How many types of lubricants are used in the engine generally ?
(a) Four (b) Two (c) Five (d) Three

£S-v & II / PART - II
SÔ¨¦ : H÷uÝ® £zx ÂÚõU-P-ÐUS ©mk® Âøh-¯-ÎU-P-Ä®. ÂÚõ Gs 28 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 10x3=30
Note : Answer any ten questions. Question No. 28 is compulsory.

16. ABS £ØÔ SÔ¨¦ ÁøµP.
Write notes on ABS.

17. •u¾u ö\´ÁuØS £¯ß£k® Ai¨£øh¨ ö£õ¸mPÒ ¯õøÁ ?
What are the basic materials required for First Aid ?

18. PõØÓÊzv (Air Compressor) &ß £¯ßPÒ ¯õøÁ ?
What are the uses of Air Compressor ?

19. CNG GßÓõÀ GßÚ ?
What is meant by CNG ?

20. Ãa_ GßÓõÀ GßÚ ?
What is Stroke ?

21. Qµõ[U \õ¨m&ß ÷Áø» ¯õx ?
What are the function of Crank Shaft ?

[ v¸¨¦P / Turn over

7685 6

22. £» Âu©õÚ ©¨ÍºPÎß ö£¯ºPøÍU SÔ¨¤kP.
Mention the names of various mufflers.

23. SκÂUS® •øÓ°À EÒÍ £õP[PÒ ¯õøÁ ?
What are the parts in the cooling system ?

24. öuº÷©õìhõm ÁõÀÄ GßÓõÀ GßÚ ?
What is meant by Thermostat Valve ?

25. £õ´uÀ ußø© GßÓõÀ GßÚ ?
What is meant by fluidity ?

26. £¯nzuõÒ GßÓõÀ GßÚ ?
What is meant by trip sheet ?

27. Põº¦÷µmh›ß £oPÒ ¯õøÁ ?
What are the functions of Carburetor ?

28. GßâÛÀ E¯Ä |øhö£Ö® £õP[PÒ ¯õøÁ ?
What are the parts lubricated in an engine ?

£S-v & III / PART - III

SÔ¨¦ : H÷uÝ® I¢x ÂÚõU-P-ÐUS ©mk® Âøh-¯-ÎU-P-Ä®. ÂÚõ Gs 35 &US
Pm-hõ-¯-©õP Âøh-¯-ÎU-P-Ä®. 5x5=25
Note : Answer any five questions. Question No. 35 is compulsory.

29. øPU P¸ÂPÎß ÁøPPÒ ¯õøÁ ? H÷uÝ® Cµsiß £h® ÁøµP.
What are the types of hand tools ? Draw any two diagrams of them.

30. ö£m÷µõ¼À C¸UP ÷Ási¯ £s¦PÒ H÷uÝ® I¢vøÚU SÔ¨¤kP.
Write any five properties of Petrol.

31. EÒöÍ› GßâÛÀ EÒÍ •UQ¯ £õP[PÒ ¯õøÁ ? AÁØÖÒ H÷uÝ® JßÔøÚ
ÂÍUPÄ®.
What are the important parts of I.C. engine ? Explain any one of them.

7 7685
32. ÁΩsh» PõØÔÀ EÒÍ ©õ_UPÍõÀ ©ÛuºPÐUS HØ£k® £õv¨¦PÒ ¯õøÁ ?
What are the effects of air pollution to the Human ?

33. B´Âß ÁøPPÒ (£µõ©›¨¦) ¯õøÁ ? H÷uÝ® JßÔøÚ ÂÁ›UPÄ®.
What are the types of inspection (Maintenance) ? Explain any one type.

34. E¯Ä Gsön´°ß £s¦PÒ ¯õøÁ ?
What are the properties of a Lubricating Oil ?

35. PõØÔÚõÀ SκÂUS® •øÓø¯ £h® Áøµ¢x £õP[PøÍU SÔUPÄ®.
Draw the diagrams of air cooling system. Label the parts.

£S-v & IV / PART - IV
SÔ¨¦ : AøÚz-x ÂÚõU-P-ÐU-S® Âøh-¯-ÎU-P-Ä®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20
Note : Answer all questions. Draw diagrams wherever necessary.

36. (A) C¯¢vµ £õxPõ¨¦ Âv•øÓPÒ SÔzx ÂÍUSP.
AÀ-»-x
(B) EÒöÍ› GßâøÚ GÆÁõÖ } ÁøP¨£kzxÁõ´ ?
(a) Explain Machine Safety precaution.
OR
(b) How do you classify the Internal Combustion engine ?

37. (A) }µõÀ SκÂUS® •øÓ H÷uÝ® JßøÓ £hzxhß ÂÁ›UPÄ®.
AÀ-»-x
(B) Gί Põº¦÷µmh›ß £h® Áøµ¢x C¯[S® Âuzøu ÂÁ›UPÄ®.
(a) Explain any one method of water cooling system ?
OR
(b) Draw and explain the working principle of a simple carburetor.

-oOo-

[ v¸¨¦P / Turn over

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