CBSE Class 12 Sample Paper 2027 Solution (Marking Scheme) for Engineering Graphics

FOR CBSE CLASS 12 PREPARATION

CBSE Class 12 Sample
Paper 2027 Solution
(Marking Scheme) for
Engineering Graphics
EXAM YEAR TYPE SUBJECT
CBSE Class 12 2027 Solutions Engineering Graphics

Notes · Sample Papers · Previous Year Papers · Mock Tests

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ENGINEERING GRAPHICS – Code No. 046
MARKING SCHEME
CLASS - XII – (2026-27)
Time Allowed: 3 hours Maximum Marks: 70
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1. (b) oraBehind the object 1
2. (d) or Hatching Lines 1
3. (c) or √2 : √3 1
4. (c) or 3 1
5. (b) or D = 0.50 P 1
6. (c) or (iii) & (iv) 1
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7. (b) or (ii) & (iii)
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8. (b) or 1 Sleeve, 2 Rods and 2 Cotters
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9. (d) or A-(iv) B-(iii) C-(i) D-(ii) 1
10. (c) or (ii) & (iv) 1
11. (d) or d 1
12. (b) or A-(i) B-(iv) C-(ii) D-(iii) 1
13. (a) or (i) & (iii) 1
14. (a) or A-(iv) B-(iii) C-(ii) D-(i) 1
SECTION – B m
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c.16.o (b) or Perpendicular to HP and parallel to VP
15. (c) or Equal
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ag 18. (c) or Cylinder and Cone 1
19. (b) or Bolts and Nuts 1
20. (c) or Stud 1
21. (b) or One side only 1
22. (b) or Soft metal 1

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23. (A) ASSEMBLY OF BUSH BEARING

(I) FRONT VIEW RIGHT HALF IN SECTION 13

(i) Drawing the left half of base and bush correctly 4
(ii) Drawing the right half of base correctly including oil hole,
mounting hole and recess of 4 mm with section lines 6
(iii) Drawing right half of bush correctly including oil hole with section lines
3

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(II) TOP VIEW 8

(i) Drawing base and bush including hidden lines 4
(ii) Drawing mounting holes, oil hole and cutting plane 4

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(III) OTHERS
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(i) Six Important Dimensions 3
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(ii) Printing title, Projection symbol and Scale used 3
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23. (B) DIS-ASSEMBLY OF FLANGE PIPE JOINT

(I) FLANGE B

(i) Front View upper half in section 8
a. Drawing the lower half and conventional end 3
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b. Drawing the upper half including hole of Ø12 mm and
conventional end with hatching lines 5
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(ii) Right Side View.
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a. Drawing the circles of Ø116, Ø60, Ø52, Ø44 and four holes of
5

b. Drawing the pitch circle of Ø90 mm, cutting plane and
hatching lines of conventional end of pipe 2

(II) GASKET

(i) Full sectional front view 3
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a. Sectional front view with shading to show rubber 3
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a (III) OTHERS 6

(i) 6 Important Dimensions. 3
(ii) Printing titles, Symbol of Projection and Scale used. 3

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SECTION – C

24. (I) ISOMETRIC SCALE 4

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(i) Drawing 45o inclined line showing true lengths 1
(ii) Projections o m30 inclined line showing isometric length with 1mm m .
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subdivisions in one part 2
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(iii) Writing 1
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c. 24.o (II) ISOMETRIC PROJECTION OF PENTAGONAL PYRAMID sem 9 .co
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(i) Helping figure 1
(ii) Drawing isometric pentagon 4
(iii) Drawing face edges 2
(iv) Dimensions 1
(v) Indicating the axis and direction of viewing 1

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25. (A) KNUCKLE THREAD PROFILE 8

(i) Distance equal to half pitch 2
(ii) Crest and roots 3
(iii) Hatching lines with conventional break 1
(iv) Standard dimensions 2

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OR

25. (B) HEXAGONAL BOLT 8

(i) Front view 3
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(ii) Side view
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(iii) Standard 2
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