Question Papers For Board Examinations 2019
Class – XII
Subject – Engineering Graphics
Subject :- Engineering Graphics
Class : XII
Year : 2019
General Instructions :
(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 no view of question 2, hidden edges or lines are required.
(vii) In question 4, hidden edges or lines are to be shown in views without section.
(viii) Give your answers according to questions.
Answer any eight questions out of ten questions. Each question is of 1 mark.
1.on your drawing sheet.
(i) The projection generally used for engineering practice is
(a) Picture projection
(b) Isometric projection
(c) Oblique projection
(d) Perspective projection
(ii) Which one among the following is called screw pair ?
(a) Bolt and nut
(b) Shaft and key
(c) Gib and cotter
(d) Rivet and plate
(iii) In a Hook bolt, the shank of the bolt
(a) Passes through a hole in one part only
(b) Passes through the holes in two parts
(c) Does not pass through any of the parts
(d) Passes through a key-hole
(iv) In bushed bearing, the sole of the bearing is recessed for
(a) Making it leak-proof
(b) Joining the shafts
(c) Fitting the bush
(d) Better stability on the surface
(v) The total number of components in turnbuckle assembly is
2.(i) Construct an isometric scale.
(ii) An inverted frustum of a pentagonal pyramid (base edge 25 mm,top edge 40 mm and height 60 mm) is resting on H.P., with its axis perpendicular to H.P. One of its base edges is parallel to V.P. and nearer to the observer. Draw its isometric projection. Show the axis and indicate the direction of viewing. Give all the dimensions.
(iii) A cylinder (base diameter 50 mm and height 50 mm) with its axis erpendicular to H.P. is placed centrally on the top rectangular face of a horizontal triangular prism (side of triangle 40 mm and length of axis 70 mm). The prism is resting on its long edge with its axis parallel to both V.P. and H.P. Draw the isometric projection of the combination of solids. Show the axis of each solid and indicate the direction of viewing. Give all the dimensions.