Karnataka SSLC Mid Term Question Paper 2025 Elements of Mechanical Engineering

Government of Karnataka
Karnataka Secondary Education Examination Board

Question Papers
Mid Term

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KARNATAKA SCHOOL EXAMINATION AND ASSESSMENT BOARD
6th Cross, Malleshwaram, Bengaluru – 560 003

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S.S.L.C. MID-TERM EXAMINATION
FOR THE YEAR – 2025-26
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Subject : ELEMENTS OF MECHANICAL ENGINEERING - IV

ËÐÜ¿á ÓÜíPæàñÜ : 52 Subject Code : 52

©®ÝíPÜ : 19. 09. 2025 ] [ Date : 19. 09. 2025
ÓÜÊÜá¿á : ¸æÙÜWæY 10-30 Äí¨Ü ÊÜá«ÝÂÖÜ° 1-45 ÃÜÊÜÃæWæ ] [ Time : 10-30 A.M. to 1-45 P.M.
WÜÄÐÜu AíPÜWÜÙÜá : 80 ] [ Max. Marks : 80

General Instructions to the Candidate :
1. This Question Paper consists of 17 questions.
2. Follow the instructions given against the questions.
3. Figures in the right hand margin indicate maximum marks for the questions.
4. The maximum time to answer the paper is given at the top of the question paper.
It includes 15 minutes for reading the question paper.
Note : i) Answer all the questions.
ii) Drawing should be drawn in drawing sheet only.
iii) All dimensions are in mm.
I. Four alternatives are given for each of the following questions / incomplete
statements. Select the most appropriate alternative and write it in the
answer book along with its alphabet : 10 × 1 = 10
1. A diesel engine has
(A) one valve (B) four valves
(C) three valves (D) two valves
2. Four stroke sequence of operation is
(A) suction, exhaust, compression and power
(B) suction, power, exhaust and compression
(C) suction, compression, power and exhaust
(D) suction, compression, exhaust and power

MID/T-25-26/61 [ Turn over

52 2
3. Compression ratio of petrol engine ranges from

(A) 7 : 1 to 12 : 1 (B) 16 : 1 to 20 : 1

(C) 2 : 1 to 7 : 1 (D) 12 : 1 to 16 : 1

4. Rectilinear motion is converted into rotary motion with the help of

(A) valves and piston

(B) crank and connecting rod

(C) connecting rod and piston

(D) crank and piston

5. Petrol engine draws

(A) only air (B) only petrol

(C) air-petrol mixture (D) diesel

6. A plane has

(A) two dimensions (B) one dimension

(C) four dimensions (D) three dimensions

7. If a square plane is resting on HP with one of its sides and inclined 60º to
HP then its top view may be

(A) Straight line (B) Square

(C) Rectangle (D) Circle

8. Exterior angle of a regular pentagon is

(A) 72º (B) 108º

(C) 60º (D) 120º

9. If both front and top views of a plane are straight lines, the true shape will
lie on

(A) Horizontal plane (B) Vertical plane

(C) Profile plane (D) Inclined plane

10. XY line is also known as

(A) Reference line (B) Projection line

(C) Dimension line (D) Axis line

MID/T-25-26/61

3 52
II. Answer the following questions :

11. a) Define heat engine. 2

b) Write the types of I.C. engine on the basis of fuel used and method of
cooling. 3

c) Draw the neat sketch of I.C. engine and label the parts. 5

12. a) Explain the following : 2

i) Bore

ii) TDC

b) Write the applications of I.C. engine. 3

c) With neat diagram explain the working of 4-stroke petrol engine. 5

13. a) Define E.C. and I.C. engines. 2

b) Explain the working of 2-stroke diesel engine. 3

c) Write short notes on the following : 5

i) Piston

ii) Flywheel

14. a) Write the comparison between 2-stroke and 4-stroke I.C. engines. 5

b) An equilateral triangular lamina of 30 mm side lies with one of its edges on
H.P. such that the surface of the lamina is inclined to the HP at 60º. Draw
the projections. 5

15. a) A regular square lamina of side 40 mm is placed with one of its sides on HP
such that the surface is inclined at 30º to HP and perpendicular to VP. Draw
its top and front views. 5

b) A regular pentagonal lamina of side 30 mm is placed with one of its corners
on HP such that the surface of the lamina is inclined to the HP at 45º. Draw
the projections. 5

16. A circular lamina of 70 mm diameter lies on HP such that its surface is inclined
at 45º to HP. Draw its front and top views. 10

17. A regular hexagonal lamina of side 30 mm is placed with one of its corners on HP
such that the surface is inclined at 60º to HP. Draw the projections. 10

MID/T-25-26/61 [ Turn over

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