CBSE Class 12 Sample Paper 2025 for Engineering Graphics

CENTRAL BOARD OF SECONDARY EDUCATION

SAMPLE PAPER
CLASS 12
2025

SAMPLE QUESTION PAPER
XII – (2024-25)
ENGINEERING GRAPHICS (046)

Time Allowed: 3 hours Maximum Marks: 70

Note:
(i) Attempt all the questions.
(ii) Use both sides of the drawing sheet, if necessary.
(iii) All dimensions are in millimetres.
(iv) Missing and mismatching dimensions, if any, may be suitably
assumed.
(v) Follow the SP: 46 – 2003 revised codes. (with first angle method of
projection)
(vi) In question 23, hidden edges or lines are to be shown in views
without section.
(vii) In question 24, no hidden edges or lines required.

SECTION – A

Q.1 to Q.14 : Answer the following Multiple Choice Questions. Print the correct
choice on your drawing sheet. 14 X 1 = 14

1. An isometric projection of a square is drawn as
A. a square having foreshortened length
B. a square having true length
C. a rhombus of true length
D. a rhombus of foreshortened length

Page 1 of 12

2. Choose the correct statements for the given figure:

(i) The triangular ends are perpendicular to VP
(ii) The triangular ends are parallel to VP
(iii) The axis of the prism is parallel to VP
(iv) The axis of the pyramid is perpendicular to VP

A. (i) & (ii)
B. (ii) & (iii)
C. (i) & (iii)
D. (i), (ii) & (iii)

3. In first-angle projection method, we assume the object to be situated
_________ V.P. and _________ H.P.
A. In front of, below
B. behind, below
C. in front of, above
D. behind, above

4. How is non-isometric lines located and drawn?
A. They are drawn parallel to the isometric axis
B. They are measured using the angle from the orthographic/ helping
view
C. They are located by determining its endpoints
D. They are measured directly using the given angle

Page 2 of 12

5. Which type of thread profile is used in feed mechanism of machine tools?
A. BSW
B. Metric
C. Square
D. Knuckle

6. The designation M20 x 2 square bolt means
A. the major diameter is 20mm and pitch is 2mm
B. two bolts of major diameter 20mm
C. two bolts of pitch 20mm
D. the metric screw thread of diameter 40mm

7. Match the LIST - I with LIST – II :
LIST – I LIST – II
(MACHINE PARTS) (FEATURES)

a. Plain Stud (i) Permanent fastener

b. CSK Head rivet (ii) Headless bolt

c. Grub screw (iii) Counter sunk head temporary fastener

d. CSK Head screw (iv) Headless screw

A. a-(i) b-(ii) c-(iii) d-(iv) C. a-(ii) b-(iii) c-(i) d-(iv)
B. a-(ii) b-(i) c-(iv) d-(iii) D. a-(i) b-(iv) c-(ii) d-(iii)

8. Match the LIST – I with LIST – II :

LIST – I LIST – II
(ISOMETRIC PROJECTION) (ORIENTATION OF AXIS)
(a)

(i) Axis of top solid is vertical &
axis of bottom solid is
horizontal

Page 3 of 12

(b)

(ii) Axes of both solids are
vertical

(c)

(iii) Axis of top solid is horizontal
& axis of bottom solid is also
horizontal

(d)

(iv) Axis of top solid is horizontal
& axis of bottom solid is
vertical

A. (a)-(i) (b)-(ii) (c)-(iii) (d)-(iv) C. (a)-(ii) (b)-(iii) (c)-(i) (d)-(iv)
B. (a)-(iii) (b)-(iv) (c)-(i) (d)-(ii) D. (a)-(i) (b)-(iv) (c)-(ii) (d)-(iii)

9. What will be the threaded length of the nut end, if the nominal diameter of a
collar stud is 10 mm?
A. 26 mm C. 10 mm
B. 20 mm D. 15 mm

Page 4 of 12

10. Choose the correct statements for the given figure:

(i) The square pyramid is resting on its apex on a triangular pyramid.
(ii) An inverted square pyramid is centrally placed on the rectangular
face of a prism.
(iii) The triangular prism is lying on its long edge on HP
(iv) The triangular pyramid is lying on its rectangular face on HP

A. (i) & (iii) C. (i) & (iv)
B. (ii) & (iv) D. (ii) & (iii)

11. The isometric projection of combination of solids is shown. Choose the
correct top view in orthographic projection for this combination.

A. B. C. D.

Page 5 of 12

12. Strap is a part of which of the following machine joint?

A. Flange pipe Joint
B. Gib and cotter joint
C. Tie rod joint
D. Sleeve and cotter joint

13. Which statements are correct for a ‘Cotter’?

(i) It is tapered on both sides.
(ii) Two cotters are used in a Gib and Cotter Joint.
(iii) The taper helps in easy insertion & withdrawal.
(iv) It has uniform thickness.

A. (i) & (iii) C. (ii) & (iv)
B. (iii) & (iv) D. (ii) & (iii)

14. Match LIST – I with LIST – II, for the given isometric projection of
combination of solids:

LIST I LIST II

a. No. of triangular faces (i) three

b. No. of apex (ii) four

Page 6 of 12

c. No. of base edges parallel to VP (iii) eight

d. No. of rectangular faces (iv) one

A. a-(i) b-(ii) c-(iii) d-(iv) C. a-(iii) b-(ii) c-(i) d-(iv)
B. a-(iii) b-(iv) c-(ii) d-(i) D. a-(i) b-(iv) c-(ii) d-(iii)

SECTION – B

Q.15 to Q.18 : Read the following paragraph and answer the questions given
below: 4X1=4

Isometric projection is a powerful tool used in design and engineering to
represent three-dimensional objects on a two-dimensional surface with accuracy.
In a recent project, an architecture firm employed isometric projection to design a
modern office space. By utilizing isometric drawings, they were able to create
precise representations of the office layout, including furniture placement and
spatial arrangements.
The firm presented the isometric drawings to their client, who was impressed by
the clarity and detail provided. This visualization helped the client to better
understand the proposed design, leading to quicker decision-making and
ultimately a smoother project development process.

Page 7 of 12

15. What is isometric projection primarily used for?
A. Representing two-dimensional objects
B. Representing three-dimensional objects
C. Creating abstract art
D. Creating animations

16. Which industry commonly utilizes isometric projection?
A. Fashion
B. Agriculture
C. Engineering and design
D. Healthcare

17. Why is isometric projection valuable in architectural design?
A. It simplifies and helps in better visualization of complex parts of the
project
B. It provides two-dimensional multiple views
C. It maintains accurate measurements of all dimensions
D. It helps in cutting the cost by reducing the size

18. For drawing isometric projection of the project, the isometric dimensions
will be
A. Equal to true dimensions
B. More than true dimensions
C. Half of the true dimensions
D. Equally foreshortened true dimensions

Q.19 to Q.22 : Read the following paragraph and answer the questions given
below: 4X1=4

‘’If you have ever looked out of a plane window at the surface of the wing, you
might have noticed that all the panels are held together with a series of small
round joiners along with their edges. These are rivets and believe it or not, these
small and inconspicuous little fasteners are actually one of the key ingredients in
the history and success of the aerospace industry. The design and flexibility of
the rivet is a fundamental part of what lets aero-planes do what they do. But just
what is it about rivets that make them so special – they evenly distribute the load
and stress on the components which make them much stronger than welded
joints.”
[Excerpt from Taking Flight: The Critical Role Rivets play in Aerospace
Engineering (www.rivetwise.co.uk)]

Page 8 of 12

19. What makes rivets so special in the aerospace industry?
A. Rivets are temporary fasteners
B. Even distribution of load
C. They have external screw threads
D. Their hexagonal design

20. Where else are rivets used among following?
A. To join square rods
B. To join steel structures of bridges
C. With a square nut
D. In Tie-rod joint

21. Which among the following is not a type of fastening?
A. Sectioning
B. Welding
C. Riveting
D. Screw pair

22. In the top view of a vertical flat head rivet of diameter d, the diameter of the
outer circle is
A. d
B. 2d
C. 1.6d
D. 0.7d

Page 9 of 12

23. (A) Figure 1 shows the details of parts of a Flange Pipe Joint.
Assemble all these parts correctly and then draw to scale 1:1; it’s
following views:
(a) Front View, upper half in section 13
(b) Right Side View 8
Print the title and scale used. Draw projection symbol. Give six
important dimensions. 6

Page 10 of 12

OR

23. (B) Figure 2 shows the assembly of an Open Bearing. Disassemble
the parts correctly and then draw to scale 1:1 its following views of
the following components. Keeping the same position of both body
and bush with respect to H.P and V.P. as given:
(a) BODY
(i) Full sectional front View 8
(ii) Top View 6

(b) BUSH
(i) Front View 4
(ii) Top View 3

Print the titles of both and scale used. Draw the projection symbol. Give
six important dimensions. 6

Page 11 of 12

SECTION – C

24. I.) Construct an isometric scale. 4
II.) Draw the isometric projection of an inverted hexagonal pyramid (base
edge 30 mm, height 70mm) with its axis perpendicular to H.P and
parallel to V.P., keeping a pair of base edges of the hexagon parallel to
the V.P. Indicate the direction of viewing. Give all the dimensions. 9

25. (A) Draw to scale 1:1, the standard profile of the Metric thread internal
with the enlarged pitch as 40mm. Give standard dimensions. 8

OR

25. (B) Draw to scale 1:1, the front view and top view of a vertical
Hexagonal Nut of nominal diameter 25 mm. Give the standard
dimensions. 8

Page 12 of 12

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