CBSE Class 12 Sample Paper 2022 for Engg Graphics Term 1

SAMPLE QUESTION PAPER (2021-22)
Class – XII
TERM – 1
ENGINEERING GRAPHICS (046)

Maximum Marks: 35 Time Allowed: 90 Minutes
General Instructions:
1. The Question Paper contains three sections A, B and C.
2. Section A has 25 questions. Attempt any 20 questions.
3. Section B has 24 questions. Attempt any 20 questions.
4. Section C has 6 questions. Attempt any 5 questions.
5. All questions carry equal marks.
6. There is no negative marking.
SECTION A
This Section A has 25 Multiple Choice Questions. Attempt any 20 questions.
1) Which is the included angle of a regular hexagon?
a) 300
b) 600
c) 900
d) 1200
2) Name the projection with multiple views.
a) Perspective projection
b) Isometric projection
c) Orthographic projection
d) Oblique projection
3) Name the solid with apex.
a) Cone
b) Square prism
c) Triangular Prism
d) Sphere
4) Name the type of line which is used for dimensioning.
a) Small dash line
b) Chain line
c) Wavy line
d) Thin continuous line
5) Which is the correct sequence in case of first angle method of projection?
a) Observer, Plane of projection, Object
b) Observer, Object, Plane of projection
c) Object, Plane of projection, Observer
d) Object, Observer, Plane of projection

6) What is the thread angle of a metric thread?
a) 400
b) 600
c) 800
d) 1000
7) The angle between the flanks of a BSW thread profile is?

a) 600
b) 900
c) 550
d) 450
8) Usually the section lines are inclined with horizontal line at.
a) 450
b) 350
c) 250
d) 150
9) Which one of these is a temporary fastening?
a) Welding
b) Nut-Bolt
c) Riveting
d) Pasting
10) Which among these is used for power transmission?
a) Square thread
b) BSW thread
c) Metric thread internal
d) Metric thread external
FILL IN THE BLANKS
11) _____________is the projection used in engineering practices.
a) Isometric projection
b) Oblique projection
c) Perspective projection
d) Inclined projection
12) _____________projection gives the true size of the object.
a) Isometric
b) orthographic
c) Oblique
d) Perspective
13) The isometric length of 70 mm is ____________.
a) Equal to true 70 mm
b) Less than true 70 mm
c) More than true 70 mm
d) Equal to true 100 mm.
14) The angle between the main scale and isometric scale is ____________.
a) 150
b) 300
c) 450
d) 900
15) The shape of circle in isometric projection is ______________.
a) Cycloid
b) Circle
c) Parabola
d) Ellipse

16) The angle of chamfer is usually _____ with the base of a hexagonal nut.
a) 100
b) 200
c) 300
d) 400
17) The full form of B. S. W. thread is ___________.
a) Bureau of Standard Width
b) Bureau of Standard Whitworth
c) British Standard Width
d) British Standard Whitworth
18) Knuckle thread is a modified form of a _______________ screw thread.
a) Square
b) BSW
c) Metric
d) V – thread

CHOOSE THE MOST APPROPRIATE FIGURE
19) A vertical square prism with its axis perpendicular to HP and parallel to VP

20) A horizontal solid

21) A hemisphere resting on HP with its circular face on it

22) An inverted solid

23) A solid resting on one of its long edges

24) A vertical hexagonal pyramid

25) Isometric projection of a horizontal square

SECTION B
This Section B has 24 Multiple Choice Questions. Attempt any 20 questions.

26)

a) The base edge of a cube is not equal to its height.
b) The base edge of a cube is equal to its height.
c) A cube has eight faces.
d) A cube has an apex.
27)

a) Axis of the prism is perpendicular to H.P.
b) Axis of the prism is parallel to V.P.
c) Hexagonal ends of the prism are perpendicular to V.P.
d) Hexagonal ends of the prism are parallel to V.P.

28)

a) The cylinder is resting on H.P. with one of its long edges on it.
b) The cylinder is resting on H.P. with its base on it.
c) The cylinder is resting on H.P. with one of its rectangular faces on it.
d) The cylinder is resting on H.P. with its axis parallel to both H.P. and V.P.

29)

a) The axis is inclined to H.P.
b) The axis is inclined to V.P.
c) The axis is perpendicular to H.P. and parallel to V.P.
d) The axis is perpendicular to V.P. and parallel to H.P.

30)

a) One of the base sides of the pentagonal pyramid is perpendicular to V.P.
b) One of the base sides of the pentagonal pyramid is parallel to V.P.
c) One of the base sides of the pentagonal prism is perpendicular to V.P.
d) One of the base sides of the pentagonal prism is parallel to V.P.

31)

a) The common axis is perpendicular to HP and parallel to VP
b) The common axis is perpendicular to VP and parallel to HP
c) The axis of the prism is parallel to HP and the axis of the pyramid is perpendicular to HP
d) The axis of the prism is perpendicular to HP and the axis of the pyramid is parallel to HP

32)

a) The top solid is square prism and the bottom solid is triangular prism.
b) The top solid is triangular prism and the bottom solid is square prism.
c) Both the solids are square prisms.
d) Both the solids are triangular prisms.

33)

a) The size of common axis is true 90mm.
b) The size of common axis is less than true 90mm.
c) The size of common axis is more than true 90mm.
d) The size of common axis is true 100mm.

SELECT THE CORRECT OPTION CORRESPONDING TO THE ORIENTATION OF THE GIVEN
ISOMETRIC PROJECTION OF COMBINATION OF SOLIDS.
34)

a) Both the solids are vertical and one of the base edges of the prism is parallel to VP and
nearer the observer.
b) Both the solids are vertical and one of the base edges of the prism is perpendicular to
VP.
c) Both the solids are vertical and one of the base edges of the prism is parallel to VP and
near it.
d) Both the solids are vertical and two of the base edges of the prism are parallel to VP.

35)

a) The common axis is perpendicular to HP and two of the base edges of the prism are
perpendicular to VP
b) The common axis is perpendicular to VP and two of the base edges of the prism are
perpendicular to VP
c) The common axis is perpendicular to HP and two of the base edges of the prism are
parallel to VP
d) The common axis is perpendicular to VP and two of the base edges of the prism are
parallel to VP

36)

a) A hemisphere is kept centrally on the top hexagonal surface of a hexagonal prism with
its curved surface on it.
b) A sphere is kept centrally on the top hexagonal surface of a hexagonal prism with its
curved surface on it.
c) A hemisphere is kept centrally on the top rectangular face of a hexagonal prism with its
curved surface on it.
d) A sphere is kept centrally on the top rectangular face of a hexagonal prism with its
curved surface on it.

37)

a) A vertical square pyramid is kept on a vertical circular disc.
b) A vertical triangular pyramid is kept on a vertical square slab.
c) A vertical square pyramid is kept on a vertical square slab.
d) A vertical triangular pyramid is kept on a vertical circular disc.

38)

a) The isometric projection of a sphere is a circle whose diameter is equal to the isometric
diameter of the sphere.
b) The isometric projection of a sphere is a circle whose diameter is equal to the true
diameter of the sphere.
c) The isometric projection of a sphere is a circle whose diameter is equal to half of the
true diameter of the sphere.
d) The isometric projection of a sphere is a circle whose diameter is equal to double of the
true diameter of the sphere.

39)

a) Axis of both prism and cylinder are perpendicular to HP.
b) Axis of both prism and cylinder are perpendicular to VP.
c) Axis of prism is perpendicular to VP and axis of cylinder is perpendicular to HP.
d) Axis of prism is perpendicular to HP and axis of cylinder is perpendicular to VP.

40)

a) A vertical cylinder of base diameter 40 mm is placed centrally on a hexagonal prism
which is resting on HP with one of its long edges on it.
b) A vertical cylinder of base diameter 40 mm is placed centrally on a pentagonal prism
which is resting on HP with one of its long edges on it.
c) A vertical cylinder of base diameter 40 mm is placed centrally on a pentagonal prism
which is resting on HP with one of its rectangular faces on it.
d) A vertical cylinder of base diameter 40 mm is placed centrally on a hexagonal prism
which is resting on HP with one of its rectangular faces on it.

41)

a) A vertical pentagonal pyramid with one of its base edges parallel to VP is placed
centrally on a horizontal square prism with its square ends parallel to VP.
b) A vertical pentagonal pyramid with one of its base edges perpendicular to VP is placed
centrally on a horizontal square prism with its square ends perpendicular to VP.
c) A vertical hexagonal pyramid with two of its base edges perpendicular to VP is placed
centrally on a horizontal square prism with its square ends parallel to VP.
d) A vertical hexagonal pyramid with two of its base edges parallel to VP is placed centrally
on a horizontal square prism with its square ends perpendicular to VP.

TWO STATEMENTS ARE GIVEN – ONE LABELLED ASSERTION (A) AND THE OTHER LABELLED
REASON (R). SELECT THE CORRECT ANSWER TO THE FOLLOWING QUESTIONS FROM THE
CODES (a), (b), (c) AND (d) AS GIVEN BELOW:

a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false and R is also false.

42) A: Knuckle thread is a modification of a square thread.
R: Knuckle threads are used in electric bulbs.
43) A: The portion between the crest and root is called flank.
R: The angle between the flanks in a metric thread is 90 0.
44) A: The actual depth of square thread is given as 0.96P, where P represents the pitch of thread.
R: The portion between crest and root is called as pitch.
45) A: Left hand thread is represented by LH thread.
R: Usually all the jewellery mating pieces have LH threads.
46) A: Chamfering on a nut is the process of removing sharp corners by rounding off the corners.
R: Chamfering is done on a nut to ensure the safety of the user.
47) A: A plain washer is a circular plate having a hole in its centre.
R: If the nominal diameter of the bolt on which the washer is used is D, then the inner diameter of
the washer is given as 2D+6.
48) A: The angle of chamfer is 600 with the base of a nut.
R: A hexagonal headed bolt cannot be used with a hexagonal nut.
49) A: Triple start threads are more useful when a quick advance is required in a screwed pair, than
single start threads.
R: If L represents Lead and P the pitch of the screw threads,
L = P in the case of single start thread.
L = 3P in the case of triple start threads.

SECTION C
This Section C has 6 Multiple Choice Questions. Attempt any 5 questions.

ANSWER THE FOLLOWING QUESTIONS AFTER READING THE GIVEN PASSAGE:
Amit buys a football as a gift for his brother. The radius of the football is 15 cm. He packs it in a square box
(cube) which is just fit enough. His brother is very happy. He is a footballer and he also loves to sketch. He
sketches a 3-D model of this football placed on the apex of a triangular pyramid, making it look like a
trophy. He might 3-D Print his model as an inspiration. He is aspiring to win the Inter-School Football
Championship this year.

50) What will be the minimum dimension of side of the gift-box (cube)?
a) 15 cm
b) 30 cm
c) 45 cm
d) 60 cm

51) If he has used isometric projection method to obtain the 3 – D model, then the size of the football drawn
will be
a) double
b) foreshortened
c) same
d) halved

52) The isometric projection of the equilateral triangular base of his model will be
a) an equilateral triangle
b) an isosceles triangle
c) a scalene triangle
d) a right angled triangle

53) What is the orientation of the common axis of these two solids?
a) Axis parallel to HP and VP
b) Axis perpendicular to HP
c) Axis perpendicular to VP
d) None of the above

54) In case he uses a triangular prism instead of the pyramid, what will be the height of his trophy?
a) It remains same
b) It becomes double
c) It becomes half
d) It becomes triple

55) He used _______ in his isometric projection method.
a) True scale
b) Vernier scale
c) Diagonal scale
d) Isometric scale