CBSE Class 12 Marking Scheme 2022 for Engg Graphics

Class: XII Session: 2021-22 Subject: ENGINEERING GRAPHICS Sample Question Paper -- TERM – 1 Marking Scheme SECTION A 1) (d) 1200 2) (c) Orthographic projection 3) (a) cone 4) (d) thin continuous line 5) (b) Observer, Object, Plane of projection 6) (b) 600 7) (c) 550 8) (a) 450 9) (b) Nut-Bolt 10) (a) Square thread 11) (a) Isometric projection 12) (b) orthographic 13) (b) less than 70mm 14) (a) 150 15) (d) ellipse 16) (c) 300 17) (d) British Standard Whitworth 18) (a) Square 19) (b) 20) (c) 21) (c) 22) (a) 23) (b) 24) (c) 25) (a) SECTION B 26) (b) The base edge of a cube is equal to its height 27) (d) Hexagonal ends of the prism are parallel to V.P.

28) (d) The cylinder is resting on H.P. with its axis parallel to both H.P. and V.P. 29) (c) The axis is perpendicular to H.P. and parallel to V.P. 30) (c) One of the base sides of the pentagonal prism is normal to V.P. 31) (a) The common axis is perpendicular to HP and parallel to VP. 32) (c) Both the solids are square prisms. 33) (b) The size of common axis is less than true 90mm. 34) (c) Both the solids are vertical and one of the base edges of the prism is parallel to VP and near it. 35) (a) The common axis is perpendicular to HP and two of the base edges of the prism are perpendicular to VP 36) (a) A hemisphere is kept centrally on the top hexagonal surface of a hexagonal prism with its curved surface on it 37) (d) A vertical triangular pyramid is kept on a vertical circular disc 38) (b) The isometric projection of a sphere is a circle whose diameter is equal to the true diameter of the sphere 39) (c) Axis of prism is perpendicular to VP and axis of cylinder is perpendicular to HP 40) (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 41) (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 42) (b) 43) (c) 44) (d) 45) (b) 46) (a) 47) (c) 48) (d) 49) (a) SECTION C 50) (b) 30 cm 51) (c) Same 52) (c) a scalene triangle 53) (b) axis perpendicular to HP 54) (a) It remains same 55) (d) isometric scale