TN 12th Question Paper 2023 Basic Civil Engineering

Tamil Nadu
State Board

2023
QUESTION
PAPER

No. of Printed Pages : 7
6684
!6684BasicCivilEnginee! £vÄ Gs
Register Number

Part III — Vocational Subjects
Ai¨£øhU Pmhh¨ ö£õÔ°¯À
BASIC CIVIL ENGINEERING
( 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_¨£vÂÀ 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®.
(3) PõÀS÷»mhº £¯ß£kzxÁx AÝ©vUP¨£kQÓx.
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.
(3) Use of Calculator is permitted.

£Sv & I / PART - I

SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15

(ii) öPõkUP¨£mkÒÍ ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯ Âøhø¯
÷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.

6684 2

1. __________, ÷uõmh® Aø©¨£uØS HØÓuÀ».
(A) BØÖ ©s (B) ö\®©s
(C) ©nØ£õ[PõÚ Ch® (D) PΩs
__________ is not suited for gardening.
(a) River soil (b) Red soil
(c) Sandy soil (d) Clayey soil

2. öÁÒͨ ö£¸UQÚõÀ öuõØÖ ÷|õ´PÒ HØ£kQßÓÚ. CuØSU Põµn®
__________ .
(A) }º ÷u[SuÀ (B) AvP ©øÇ (C) ¦¯À (D) £»zu PõØÖ
Flood causes a risk in epidemics because of __________.
(a) Water Logging (b) Heavy Rain (c) Cyclone (d) Strong wind

3. Pmhø©¨¤ß {ø»zu Gøhø¯ __________ PØPõøµ SøÓUQÓx.
(A) Gøh SøÓÁõÚ
(B) Bm÷hõ Q÷ÍÆk H÷µmhm
(C) |õº ö£õ¸mPÍõÀ Á¾Åmh¨£mh
(D) u¯õµõP P»UP¨£mh
__________ concrete reduces the dead load of the structure.
(a) Light weight
(b) Auto claved aerated
(c) Fibre reinforced
(d) Ready mix

4. __________ Jαº¨¦z ußø© öPõshx.
(A) ¤ÍõìiU (B) Psnõi
(C) Lø££º ÷£õºk (D) Cµ¨£º
__________ absorbs light.
(a) Plastic (b) Glass
(c) Fibre board (d) Rubber

5. â÷¯õöhmiU {» AÍUøP Gߣx __________ GßÖ® AøÇUP¨£kQÓx.
(A) _µ[P {» AÍUøP (B) ©mh {» AÍUøP
(C) £øhzxøÓ {» AÍUøP (D) m›UÚõö©m›UPÀ {» AÍUøP
The geodetic surveying is also called as ___________.

(a) Mine surveying (b) Plane surveying
(c) Military surveying (d) Trigonometrical surveying

3 6684

6. {Pº Gøhø¯ __________ GßÓ Q÷µUP GÊzuõÀ SÔ¨¤h»õ®.
(A) γ (B) µ (C) α (D) β
Specific weight is denoted by the Greek letter __________.
(a) γ (b) µ (c) α (d) β

7. Siusp¸US AÝ©vUP¨£mh P»[PÀ ußø©°ß AÍÄ __________.
(A) 15 &¼¸¢x 20 ppm Áøµ (B) 5 &¼¸¢x 10 ppm Áøµ
(C) 20 &¼¸¢x 25 ppm Áøµ (D) 10 &¼¸¢x 15 ppm Áøµ
The permissible turbidity of drinking water is __________.
(a) 15 to 20 ppm (b) 5 to 10 ppm
(c) 20 to 25 ppm (d) 10 to 15 ppm

8. ö©x ©nÀ ÁiPmiPÎß ÁiPmk® vÓß __________.
(A) 2000 - 3000 ¼/\.«/©o (B) 100 - 200 ¼/\.«/©o
(C) 3000 - 6000 ¼/\.«/©o (D) 500 - 1000 ¼/\.«/©o
The rate of filtration of slow sand filter is __________.
(a) 2000 - 3000 litres/m2/hour (b) 100 - 200 litres/m2/hour
(c) 3000 - 6000 litres/m2/hour (d) 500 - 1000 litres/m2/hour

9. __________ •øÓ°À PÈÄ }øµ ÷\P›zx K›hzv¼¸¢x ©ØöÓõ¸ ChzvØS
öPõsk ö\À¾® •øÓUS PÈÄ}µPØÖuÀ GßÖ ö£¯º.
(A) }ºa _ø© (B) £õuõÍa \õUPøh
(C) \À÷»ä (D) CßÁºm
The entire process of collecting and carrying sewage by ___________ system through
sewers is known as sewerage.
(a) Water Carriage (b) Sewer
(c) Sullage (d) Invert

10. Põ»µõ, uspº ‰»® £µÄÁøuU PshÔ¢uÁº __________.
(A) ÷áõ\¨ ¤µ®©õ (B) ¿°ì ö©Í›¯õì
(C) ÷áõºhõß (D) áõß ì÷|õ
__________ discovered that Cholera was spread by water.

(a) Joseph Bramah (b) Louis Moureas
(c) Jordan (d) John Snow

6684 4

11. Ea] ©ØÖ® \õø» ÷©Ø£µ¨¤ß Âή¦PøÍ CønUS® ÷Põmiß \›Ä
__________ GßÖ AøÇUP¨£kQÓx.
(A) `¨£º E¯µ® (B) \õ´Ä
(C) ÂØ\õ´Ä (D) öuõø»Ä £õºøÁ
The slope of the line joining the crown and the edges of the road surface is called
as __________.
(a) Super Elevation (b) Gradient
(c) Camber (d) Sight distance

12. u[P |õØPµa \õø» E»Qß __________ }sh ö|kg\õø»z vmh©õS®.
(A) ‰ßÓõÁx (B) CµshõÁx (C) |õßPõÁx (D) I¢uõÁx
The Golden Quadrilateral is the __________ longest highway project in the World.
(a) third (b) second (c) fourth (d) fifth

13. £µ¨¦ CÊÂø\°ß A»S __________.
(A) {³mhß/« (B) {³mhß/ª.«
(C) {³mhß/ö\.« (D) {³mhß/\.ª.«
The unit of surface tension is __________.
(a) Newton/m (b) Newton/mm
(c) Newton/cm (d) Newton/mm2

14. SÇõ°À HØ£k® BØÓÀ CǨø£ Põq® hõº]°ß `zvµzvÀ 'f' &Gߣx
__________ I SÔUQÓx.
(A) _¸UP SnP® (B) vø\÷ÁP®
(C) öÁαmk SnP® (D) Eµõ´ÄU SnP®
In Darcy’s formula for loss of head in pipes, ‘ f ’ denotes __________.
(a) Co-efficient of contraction (b) Velocity
(c) Co-efficient of discharge (d) Co-efficient of friction

15. uÁÓõÚ Cøn/CønPøÍz ÷uº¢öukUPÄ®.
(1) ¦ä & {»|kUP®
(2) ©õÀ£õ & _Úõª
(3) ¼zv¯õ & {»a\›Ä
(A) (1) ©ØÖ® (3) (B) (1) ©mk® (C) (3) ©mk® (D) (2) ©ØÖ® (3)
Find the incorrect pair/pairs.
(1) Bhuj - Earthquake
(2) Malpa - Tsunami

(3) Lituya - Land slide
(a) (1) and (3) (b) (1) only (c) (3) only (d) (2) and (3)

5 6684

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

16. AøÓ°ß Tmhø©¨¦ £ØÔ SÔ¨¦ ÁøµP.
Write short notes on grouping of rooms.

17. \ø©¯»øÓ°À Aø©UP¨£k® £o ø©¯[PÒ ¯õøÁ ?
What are the work centers in a Kitchen ?

18. ªßPõ¨¦¨ ö£õ¸mPÒ GßÓõÀ GßÚ ? ö£õxÁõP ªßPõ¨¦¨ ö£õ¸mPÍõP
£¯ß£kzu¨£k£øÁ ¯õøÁ ?
What are electrical Insulating Materials ? What are the materials commonly
used for electrical insulation ?

19. Psnõi £ØÔ ]Ö SÔ¨¦ ÁøµP.
Write short notes on glass.

20. ^º©mh¨ £µ¨¦ ©ØÖ® QøhzuÍzvØS Cøh÷¯²ÒÍ ÷ÁÖ£õk ¯õx ?
Differentiate between level surface and horizontal surface.

21. GPS &ß Ai¨£øh £SvPøÍU TÔ H÷uÝ® JßÔøÚ ÂÍUSP.
State the fundamentals of G.P.S. and explain any one.

22. }›À P»¢xÒÍ Q¸ªPøÍ AÈUS® Gί •øÓPøÍU TÖP.
State the minor methods of disinfection of water.

23. ÁiPmiPÎß ÁøPPÒ ¯õøÁ ?
What are the types of filters ?

24. }º GÆÁõÖ ©õ_£kQÓx ?
How water gets polluted ?

÷©ÀÁõmh ÁøÍÂß £¯ßPÒ ¯õøÁ ?

25.
What are the uses of Camber ?

6684 6

26. £õìPÀ Âvø¯U TÖP.
State Pascal’s Law.

27. ¦¯¼ß ÂøÍÄPÒ ¯õøÁ ?
What are the effects of cyclone ?

28. \õø» ø\øPU SÔPÎß ÷|õUP[PÒ ¯õøÁ ?
What are the purposes of Road Signs ?

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

29. ÃmiÀ ö£õxÁõP Ch®ö£Ö® AøÓPÒ ¯õøÁ ? H÷uÝ® JßøÓ ÂÍUSP.
What are the rooms in a house ? Explain any one.

30. Pmhh¨ ö£õ¸ÒPÎÀ µ¨£›ß ö£õxÁõÚ £¯ß£õkPÒ ¯õøÁ ?
What are the common uses of rubber as a building material ?

31. \[Q¼ {» AÍUøP°À HØ£k® £À÷ÁÖ uøhPøÍ ÂÁ›zx GÊxP.
Describe the different types of obstacles in chain surveying.

32. ö£õx }º Â{÷¯õPz vmhzvß ÷|õUP[PÒ ¯õøÁ ?
What are the objectives of public water supply scheme ?

33. C¯ØøP }º ©õ_£õmiØPõÚ Põµn[PÒ ¯õøÁ ?
What are the causes of natural water pollution ?

34. ]ö©sm PØPõøµ \õø»°ß AÝT»[PÒ ©ØÖ® ¤µvT»[Pøͨ £mi¯¼kP.
List the merits and demerits of cement concrete road.

35. SÇõ´PÎÀ HØ£k® ÷£›Ç¨¦PÒ ©ØÖ® ]Ô¯ CǨ¦PÒ ¯õøÁ ?

What are the major and minor losses that occur in pipes ?

7 6684

£Sv & IV / PART - IV

SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. ÷uøÁ¯õÚ Ch[PÎÀ £h®
ÁøµP. 2x10=20
Note : Answer all the questions. Draw neat sketches wherever required.

36. (A) Si°¸¨¦U Pmhh[PÎß ÁøPPøÍU TÔ ÂÍUSP.
AÀ»x
(B) 300 ª.« Âmh•® 600 « }Í•® öPõsh J¸ SÇõ´ 3 « }º©mh ÷ÁÖ£õk
öPõsh Cµsk }ºz÷uUP[PøÍ CønUQÓx. ö\]°ß ©õÔ¼ø¯ 60 GÚU
öPõsk AUSÇõ°ß ÁÈ÷¯ Kk® }›ß vø\÷ÁPzøuU PõsP.
(a) State and explain the types of residential houses.
OR
(b) A 300 mm diameter and 600 m long pipe connects two reservoirs. The
difference in water level between the reservoirs is 3 m. Determine the
velocity of flow in the pipe. Take Chezy’s constant as 60.

37. (A) öÁÒͨö£¸UQß÷£õx®, Auß ¤ßÚ¸® ö\´¯ ÷Ási¯ •ßöÚa\›UøP
|hÁiUøPPÒ £ØÔ Â›ÁõP GÊxP.
AÀ»x
(B) J¸ ©mh AÍUøP AÍÄPÒ R÷Ç öPõkUP¨£mkÒÍÚ.
4.390, 7.620, 6.520, 3.910, 5.390, 4.730, 6.290, 3.520, 4.330, 2.990.
P¸Â 3 &Áx ©ØÖ® 8 &Áx AÍÄPÐUS¨¤ß Ch® ©õØÓ¨£kQÓx. •uÀ
AÍÂß SøÓUP¨£mh ©mh® + 200.000 «. AÍÄPøÍ AÍĨ ¦zuPzvÀ
£mi¯¼mk, ©ØøÓ¯ AÍÄPÎß SøÓUP¨£mh ©mh[PøÍ E¯ºÄ ©ØÖ®
uõÌÄ •øÓ°À PnUQmk, PnURkPøÍ \›£õºUPÄ®.
(a) Write in detail about the precautions to be taken during and after flood.
OR
(b) The level readings taken are listed below.
4.390, 7.620, 6.520, 3.910, 5.390, 4.730, 6.290, 3.520, 4.330, 2.990.
The instrument is shifted after 3rd and 8th readings. The RL of first point is
200.000 m. Enter the reading in a field book form and reduce RL by rise and
fall method. Apply usual check.

-oOo-