Karnataka SSLC Question Paper 2021 Elements of Mechanical and Electrical Engineering

BΔ«M•⁄ O⁄}⁄°¬“
Question Booklet Serial No. : 20-

®æãàí¨Ü~ ÓÜíTæ :
Register Number :
±Ü£ÅPæ - 03 / Paper - 03
GÓ….GÓ….GÇ….Ô. ÊÜááS ±ÜÄàûæ – 2021
SSLC MAIN EXAMINATION – 2021
…Œ⁄æ⁄fl : GΔ»ÊflMmÈ” A±È »ÊflO¤¿¨O⁄≈È @MsÈ G≈ÊPoÒO⁄≈È BMf¨æ⁄fl¬MVÈ - 2
& BMf¨æ⁄fl¬MVÈ V¤√≤OÈ” - 2
Subjects : Elements of Mechanical & Electrical Engineering - 2
& Engineering Graphics - 2
(CíXÉÐ… ÊÜÞ«ÜÂÊÜá / English Medium)
( CCE-RF / CCE-RR )

TEAR HERE TO OPEN THE QUESTION BOOKLET
—⁄MOÊfi}⁄ —⁄MSÊ¿ : 71E + 72E ] [ Code No. : 71E + 72E
—⁄»⁄flæ⁄fl : »⁄fl®¤¿‘⁄-2-30 ¬M•⁄ ÓÜíhæ 5-30 ¡⁄»⁄¡ÊVÊ ] [ Time : 2-30 P.M. to 5-30 P.M.

Æ⁄√ÀÊ-Æ⁄‚¥“°OÊæ⁄fl´⁄fl-}Ê¡Êæ⁄flƒfl BΔ« O⁄}⁄°¬“
Jlflo Æ⁄√ÀÊ-V⁄◊⁄ —⁄MSÊ¿ : 50 + 25 = 75 ] [ Total No. of Questions : 50 + 25 = 75
V⁄¬Œ⁄r @MO⁄V⁄◊⁄fl : 50 + 25 = 75 ] [ Max. Marks : 50 + 25 = 75
71E – GΔ»ÊflMmÈ” A±È »ÊflO¤¿¨O⁄≈È @MsÈ G≈ÊPoÒO⁄≈È BMf¨æ⁄fl¬MVÈ - 2 /
Elements of Mechanical & Electrical Engineering - 2
˨ݦìWÜÚWæ ÓÜãaÜ®æWÜÙÜá / Instructions to the Students :
1. ±ÜÅÊæàÍÜ ±ÜñÜŨÜÈÉ®Ü ÖÜ®æã°í¨Üá AíQWÜÙÜ ®æãàí¨Ü~ ÓÜíTæ¿á®Üá° ±ÜÅÍæ°±ÜâÔ¤Pæ¿á ŸÆ±ÝÍÜÌì¨Ü
ÊæáàÆᤩ¿áÈÉ ÓܳÐÜrÊÝX ŸÃæÀáÄ.
Write your eleven digit Register Number on the Question Booklet as
allotted in the admission ticket in the space provided at the top right
corner of this front page.
2. D ±ÜÅÍæ°±ÜâÔ¤Pæ¿á®Üá° ×ÊÜáá¾S hÝPæp… ÊÜáãÆPÜ ÊæãÖÜÃÜá (ÔàÇ…) ÊÜÞvÜÇÝX¨æ. ±ÜÄàûæ
±ÝÅÃÜí»ÜÊÝWÜáÊÜ ÓÜÊÜá¿áPæR ¯ÊÜá¾ ±ÜÅÍæ°±ÜâÔ¤Pæ¿á ŸÆŸ© ±ÝÍÜÌìÊÜ®Üá° PÜñܤÄÔ,
±ÜÅÍæ°±ÜâÔ¤Pæ¿áÈÉ GÇÝÉ ±ÜâoWÜÙÜá CÊæÁáà Gí¨Üá ±ÜÄàüÔPæãÚÛ.
This Question Booklet has been sealed by reverse jacket. You have to cut
on the right side to open the Question Booklet at the time of
commencement of the examination. Check whether all the pages of the
Question Booklet are intact.
3. ËÐÜ¿áÊÝÃÜá OMR ±ÜâoÊÜ®Üá° ±ÜÅñæÂàPÜÊÝX ¯àvÜÇÝWÜáÊÜâ¨Üá.
Tear here

OMR Sheet will be provided subject-wise separately.

2001 1 of 12

4. D ±ÜÅÍæ°±ÜâÔ¤Pæ¿áá GÃÜvÜá ËÐÜ¿áWÜÙÜ®Üá° Öæãí©¨Üáª, ±ÜÅ£ ËÐÜ¿áÊÜä ±ÜÅñæÂàPÜÊݨÜ
±ÜâÔ¤Pæ¿á®Üá° Öæãí©¨æ.
This set of Question Booklets consists of two subjects and each subject
has separate Question Booklet.
5. GÃÜvÜá ËÐÜ¿áWÜÙÜÈÉ PÜÅÊÜáÊÝX 50 + 25 ±ÜÅÍæ°WÜÚ¨Üáª, D ±ÜÅÍæ°±ÜâÔ¤Pæ¿áá Joár
75 ±ÜÅÍæ°WÜÙÜ®Üá° Öæãí©¨æ.

(i) GΔ»ÊflMmÈ” A±È »ÊflO¤¿¨O⁄≈È @MsÈ G≈ÊPoÒO⁄≈È BMf¨æ⁄fl¬MVÈ-2 — ±ÜÅÍæ°WÜÙÜ
ÓÜíTæ 1 Äí¨Ü 50.

(ii) BMf¨æ⁄fl¬MVÈ V¤√≤OÈ” -2 — ±ÜÅÍæ°WÜÙÜ ÓÜíTæ 51 Äí¨Ü 75.
50 + 25 Questions are provided in two subjects respectively. This set of
question booklets contains 75 questions in all.

(i) Elements of Mechanical & Electrical Engineering-2 — Question
Nos. 1 to 50.

(ii) Engineering Graphics-2 — Question Nos. 51 to 75.

6. ±ÜÅ£à ±ÜÅÍæ°Wæ Jí¨Üá AíPÜ˨Üáª, GÇÝÉ ±ÜÅÍæ°WÜÚWÜã EñܤÄÓÜáÊÜâ¨Üá PÜvÝx¿á ÖÝWÜã ±ÜÅ£
ÓÜÄ¿Þ¨Ü EñܤÃÜPæR Jí¨Üá AíPÜ˨Üáª, ñܱݳ¨Ü EñܤÃÜPæR ¿ÞÊÜâ¨æà MáOÝñܾPÜ AíPÜWÜÙÜá
CÃÜáÊÜâ©ÆÉ.
Each question carries one mark. Answering all the questions is
compulsory and each correct answer will be awarded one mark. There will
be no negative marking for wrong answers.

7. ±ÜÄàûÝ AÊÜ◊¿áÈÉ,
G) ±ÜÅÍæ°WÜÙÜ®Üá° hÝWÜÃÜãPÜñæÀáí¨Ü K©Ä.

¹) K.Gí.BÃ…. ( OMR ) ±Üâo¨ÜÈÉ ±ÜÅ£ ±ÜÅÍæ°ÓÜíTæÂWæ ÓÜÄ Öæãí¨ÜáÊÜ EñܤÃÜÊÜ®Üá°
WÜáÃÜá£ÓÜÆá ¯àvÜÇÝXÃÜáÊÜ ®ÝÆáR ÊÜêñܤWÜÙÜ ±æçQ ÓÜÄ¿Þ¨Ü EñܤÃÜ¨Ü Jí¨Üá ÊÜêñܤÊÜ®Üá°
¯àÈ/PܱÜâ³ ÍÝÀá¿á ¸ÝÇ… ±ÝÀáíp… ±æ®… ÊÜÞñÜÅ E±ÜÁãàXÔ ÓÜí±Üä|ìÊÝX

2001 2 of 12

Íæàv… ÊÜÞw. JÊæá¾ EñܤÃÜÊÜ®Üá° Íæàv… ÊÜÞw¨Ü ÊæáàÇæ Ÿ¨ÜÇÝÀáÓÜÆá AÊÜPÝÍÜËÆÉ
ÊÜáñÜᤠ¿ÞÊÜâ¨æà A®ÜWÜñÜ WÜáÃÜáñÜáWÜÙÜ®Üá° K.Gí.BÃ…. ( OMR ) ÊæáàÇæ ÊÜÞvܸÝÃܨÜá.
E¨ÝÖÜÃÜOæ : ±ÜÅÍæ° ÓÜíTæ : 20PæR EñܤÃÜ¨Ü BÁáR ÓÜíTæ C BX¨ÜªÈÉ K.Gí.BÃ….
( OMR ) ±Üâo¨ÜÈÉ BÁáR C ¿á®Üá° ¯àÈ/PܱÜâ³ ÍÝÀá¿á ¸ÝÇ… ±ÝÀáíp… ±æ®…
E±ÜÁãàXÔ D PæÙÜWæ ñæãàÄÔ¨Üíñæ ÊÜêñܤÊÜ®Üá° ÓÜí±Üä|ìÊÝX Íæàv… ÊÜÞvܸæàPÜá.
±ÜÅÍæ° ÓÜíTæ : 20) A B C D (C¨Üá E¨ÝÖÜÃÜOæWæ ÊÜÞñÜÅ)

Ô) K.Gí.BÃ…. ( OMR ) ÖÝÙæ¿á®Üá° ÊÜávÜaÜáÊÜâ¨Üá, ÖÜÄ¿ááÊÜâ¨Üá A¥ÜÊÝ Óærà±ÜÇ… ²®…
ÊÜÞvܸÝÃܨÜá.

During the examination,
a) Read the questions carefully.

b) Completely darken / shade the relevant circle against Question
Number in the OMR Sheet using blue / black ball point pen. Do not
try to alter the entry and not to do any stray marks on OMR Sheet.

Example : In the question booklet, if C is the correct answer for
Question No. 20, then in the OMR Sheet shade the option C using
blue / black ball point pen as follows.

Question No. 20) A B C D ( This is an example only )

c) Do not fold, tear, wrinkle or staple on the OMR Sheet.

8. Jí¨Üá ±ÜÅÍæ°Wæ Jí¨ÜQRíñÜ ÖæaÜác ÊÜêñܤWÜÙÜ®Üá° Íæàv… ÊÜÞw¨ÜªÈÉ AíñÜÖÜ EñܤÃÜWÜÙÜ®Üá° ñܱæ³í¨Üá
±ÜÄWÜ~Ô AíPÜWÜÙÜ®Üá° ¯àvÜÇÝWÜáÊÜâ©ÆÉ.

If more than one circle is shaded for a given question, such answer is

treated as wrong and no marks will be given.

2001 3 of 12

9. K.Gí.BÃ…. ( OMR ) ±Üâo¨ÜÈÉ ¯WÜ©ñÜ ÓܧÙܨÜÈÉ Ë¨Ý¦ì ÖÝWÜã PæãsÜw ÊæáàÈÌaÝÃÜPÜÃÜá
ñܱܳ¨æà ÓÜ× ÊÜÞvܸæàPÜá.

Student and Room Invigilator should sign in the OMR Sheet in the space

provided.
10. ±ÜÄàûÝ AÊÜ◊ ÊÜááX¨Ü ®ÜíñÜÃÜ ËÐÜ¿áÊÝÃÜá EñܤÄst K.Gí.BÃ…. ( OMR )®Üá° PæãsÜw
ÊæáàÈÌaÝÃÜPÜÄWæ ñܱܳ¨æà J²³ÓܸæàPÜá.

Candidate should return the subject-wise answered OMR Sheet to the

Room Invigilator before leaving the examination hall.

11. PÜaÝc PÝ¿áìÊÜ®Üá° ±ÜÅÍæ°±ÜâÔ¤Pæ¿áÈÉ ¯àwÃÜáÊÜ PÜaÝc PÝ¿áì¨Ü ÖÝÙæ¿áÈÉÁáà ÊÜÞvÜáÊÜâ¨Üá.

Rough work can be done in the space provided at the end of the Question
Booklet.

12. ±ÜÄàûÝ PæãsÜwÁãÙÜWæ PÝÂÆáRÇæàoÃ…, Êæã¸æçÇ… ¶æäà®…, Óݾp…ì ÊÝa… ÊÜáñÜᤠCñÜÃæ
¿ÞÊÜâ¨æà GÇæPÝó¯P… E±ÜPÜÃÜ|WÜÙÜ®Üá° ñÜÃÜáÊÜâ¨Ü®Üá° ¯Ðæà◊ÓÜÇÝX¨æ.

Calculators, Mobiles, Smart Watches and any other electronic equipment

are not allowed inside the examination hall.

2001 4 of 12

…Œ⁄æ⁄fl : GΔ»ÊflMmÈ” A±È »ÊflO¤¿¨O⁄≈È @MsÈ
G≈ÊPoÒO⁄≈È BMf¨æ⁄fl¬MVÈ - 2
Subject : ELEMENTS OF MECHANICAL AND
ELECTRICAL ENGINEERING - 2
D ±ÜÅ£Áãí¨Üá ±ÜÅÍæ°WÜÚWæ A¥ÜÊÝ A±Üä|ì ÖæàÚPæWÜÚWæ ®ÝÆáR BÁáRWÜÙÜ®Üá° ¯àvÜÇÝX¨æ.
AÊÜâWÜÙÜÈÉ ÓÜÄ¿Þ¨Ü EñܤÃÜÊÜ®Üá° BÄÔ ¯ÊÜáWæ ¯àvÜÇÝXÃÜáÊÜ K.Gí.BÃ…. ( OMR ) EñܤÃÜ
±Ü£ÅPæ¿áÈÉ ¯àÈ A¥ÜÊÝ PܱÜâ³ ÍÝÀá¿á ¸ÝÇ… ±ÝÀáíp… ±æ®…¯í¨Ü ÓÜÄ¿Þ¨Ü
BÁáR¿á®Üá° WÜáÃÜá£Ô : 50 × 1 = 50

Four choices are given for each of the following questions / incomplete
statements. Choose the correct answer among them and shade the correct
option in the OMR Sheet given to you with a black / blue ball point pen.
50 × 1 = 50
1. In two-stroke engine power is developed
(A) once in two revolutions (B) at half the revolution
(C) in every revolution (D) in every stroke
2. The function of carburetor is to
(A) provide air-fuel mixture (B) supply pure air
(C) supply fuel only (D) cool the engine
3. The part of the engine which stores energy during power stroke and
supply the same for the other three strokes is
(A) piston (B) crank
(C) connecting rod (D) flywheel
4. In a diesel engine heat is supplied at constant
(A) temperature (B) pressure
(C) volume (D) enthalpy
5. The inner diameter of engine cylinder is called as
(A) bore (B) stroke
(C) clearance (D) pitch
6. Compression ratio of diesel engines may have a range of
(A) 8 to 10 (B) 15 to 10
(C) 16 to 20 (D) 10 to 15
7. The minimum number of rings in a piston is
(A) two (B) three
(C) four (D) six

2001 5 of 12

8. Which type of engine do most cars have ?
(A) two-stroke cycle engine (B) rotary wankel engine
(C) free piston engine (D) four-stroke cycle engine
9. The common component between a petrol engine and a diesel
engine is
(A) Coiled tubes (B) Expansion valve
(C) Evaporator (D) Flywheel
10. Piston compression rings are made of which one of the following
materials ?
(A) Bronze (B) Cast iron
(C) White metal (D) Aluminium
11. The device used to increase the pressure of air by compression is
(A) air hoist (B) air lift
(C) air compressor (D) air blower
12. The ratio of the discharge pressure to the inlet pressure of air is
called
(A) Expansion ratio (B) Compression ratio
(C) Compressor efficiency (D) Volumetric efficiency
13. The absolute pressure of air at the outlet of a compressor is called
(A) discharge pressure (B) back pressure
(C) critical pressure (D) inlet pressure
14. The commonly used refrigerant in vapour absorption refrigerator is
(A) carbon dioxide (B) sulphur dioxide
(C) ammonia (D) methyl chloride
15. The chilling of freezing unit of refrigerator is called as
(A) Compressor (B) Cooling fan
(C) Carburetor (D) Condenser
16. The S.I. unit of pressure is
(A) kN/m2 (B) N/m2
(C) kN/cm2 (D) N/cm2
17. Which has minimum freezing point ?
(A) Freon-12 (B) Freon-22
(C) Carbon dioxide (D) Ammonia
18. In summer air conditioning the air is
(A) cooled and dehumidified (B) cooled and humidified
(C) heated and humidified (D) heated and dehumidified

2001 6 of 12

19. A refrigerant should have the
(A) high boiling point property
(B) high specific heat property
(C) high latent heat property
(D) high specific volume property
20. The air refrigeration is preferably used in aircrafts because
(A) it uses air which is available in plenty in the atmosphere
(B) it has high COP
(C) it is cheaper
(D) its weight per ton of the refrigeration is low
21. Carriage is part of a
(A) lathe (B) drilling machine
(C) grinding machine (D) milling machine
22. Reaming is the process of
(A) enlarging a drilled hole
(B) producing counter shape to hole
(C) finishing a drilled hole
(D) smoothing and squaring the surface around the hole
23. Embossing a diamond shaped pattern on the surface of workpiece
is called
(A) taper turning (B) knurling
(C) parting-off (D) plain turning
24. The slowest speed in lathe is adopted for the operation
(A) step turning (B) boring
(C) forming (D) thread cutting
25. The machining operation performed on a lathe to obtain a flat
surface at the end of the workpiece is called
(A) chamfering (B) facing
(C) counterboring (D) grooving
26. In a lathe apron is used to control the movement of
(A) head stock (B) tail stock
(C) chuck (D) carriage
27. In a drilling machine the linear motion of drill is called as
(A) feed (B) travel
(C) depth of cut (D) speed
28. A part of drilling machine among the following is
(A) Spindle (B) Tail stock
(C) Four jaw chuck (D) Mandrel

2001 7 of 12

29. The grooves on the drill bits are called as
(A) body clearance (B) tong
(C) flute (D) land
30. The operation of producing flat seat on drilled hole is called
(A) spot facing (B) drilling
(C) tapping (D) dieing
31. As per the Fleming's left hand rule the thumb will give
(A) direction of induced e.m.f.
(B) direction of rotation of coil
(C) direction of magnetic flux
(D) direction of motion of magnet
32. By which law the direction of the induced e.m.f. will be identified ?
(A) Lenz's law
(B) Fleming's left hand rule
(C) Fleming's right hand rule
(D) End rule
33. The magnitude of induced e.m.f. in a coil is directly proportional to
the rate of change of flux linkages. This law is known as
(A) Lenz's law
(B) Kirchhoff's law
(C) Ohm's law
(D) Faraday's law of electromagnetic induction
34. What does e.m.f. stand for ?
(A) electromotive force
(B) electromagnetic force
(C) electromated force
(D) electronic magnetic force
35. Who has stated the right hand rule ?
(A) Oersted (B) Fleming
(C) Einstein (D) Maxwell
36. As per electromagnetic induction, the e.m.f. is induced in a
(A) coil (B) bobbin
(C) galvanometer (D) voltmeter
37. Generator works on the principle of
(A) right hand rule (B) left hand rule
(C) electromagnetic induction (D) end rule
38. Example of self-induced e.m.f. is
(A) motor (B) regulator
(C) electric iron (D) choke

2001 8 of 12

39. The ratio of r.m.s. value to the average value is called
(A) Power factor (B) Q-factor
(C) Form factor (D) Rating factor
40. D.C. can be converted into A.C. by
(A) Rectifier (B) Regulator
(C) Transformer (D) Inverter
41. Instantaneous value at 90º and 270º is called
(A) average value (B) cycle
(C) amplitude (D) time period
42. Alternating current changes its magnitude and
(A) deflection (B) direction
(C) di-polar (D) depletion
43. Half cycle in sine wave has
(A) 360º (B) 270º
(C) 90º (D) 180º
44. S.I. unit of frequency is
(A) hertz (B) henry
(C) maxwell (D) lenz
45. Electrical power is measured by
(A) ammeter (B) voltmeter
(C) wattmeter (D) ohm-meter
46. The material used for heating element in electric heater is
(A) nichrome (B) nickel
(C) copper (D) aluminium
47. Capacitor is used in electric
(A) heater (B) fan
(C) iron (D) lamp
48. Majority charge carriers in P-type semiconductor are
(A) electrons (B) protons
(C) holes (D) neutrons
49. PN-junction can be used as a/an
(A) regulator (B) oscillator
(C) amplifier (D) rectifier
50. I.C. means
(A) Integrated Circuit (B) Internal Circuit
(C) Incomplete Circuit (D) Inverter Circuit

2001 9 of 12

(PÜaÝc PÝ¿áìPÝRX)
( SPACE FOR ROUGH WORK )

2001 10 of 12

(PÜaÝc PÝ¿áìPÝRX)
( SPACE FOR ROUGH WORK )

2001 11 of 12

2001 12 of 12