Thursday, June 16, 2011

PTU ME102 Engineering Drawing Dec 2009 Question Paper

BE (First/Second) Semester Exam
(Common to all Branches)
Time: 3 hrs
Maximum Marks: 60
Instruction to Candidates:
  1. Section A is compulsory.
  2. Attempt any five questions from Section B and C.
  3. Select atleast Two questions from Section B and Two from Section C.
SECTION A (Marks: 2 each)
1. a) Draw a symbol of third angle projections
Ans: Draw Fig. 7.9(c) page 7.8 of ED - Basant Agrawal, TMH.
b) What are the standard sizes of drawing sheets according to B.I.S. and which is suitable for drawing work?
Ans: Refer article 1.5 page 1.3 of ED - Basant Agrawal, TMH.
c) Where and why a cutting plane is drawn in a drawing?
Ans: Refer article 7.17 page 7.16 of ED - Basant Agrawal, TMH.
d) What are the different methods of dimensioning?
Ans: Draw article 2.12 page 2.8 of ED - Basant Agrawal, TMH.
e) What is the RepresentativeF raction (R.F.) or ScaleF actor (S.F.)?
Ans: Refer article 4.3 page 4.2 of ED - Basant Agrawal, TMH.
f) What is the difference between a quadrilateral and a polygon?
Ans: Quadrilateral has four sides whereas polygon has n number of sides where n is an integer greater than 2. Thus, quadrilateral is a type of polygon
g) Name the principal planes of projections
Ans: Vertical plane and horizontal plane
Detail at page 7.3 article 7.4 and 7.5 of ED - Basant Agrawal, TMH.
h) What is a sectional view? Why sectional views are used in drawing?
Ans: Refer page 7.17 article 7.18 of ED - Basant Agrawal, TMH.
i) What do you understand by V.T. and H.T. of section plane?
Ans: Vertical trace and Horizontal trace
Detail at page 9.2 article 9.3 of ED - Basant Agrawal, TMH.

j) Give the practical applications of the intersection of surfaces or interpenetration of solids
Ans: Refer page 14.1 article 14.2 of ED - Basant Agrawal, TMH.

SECTION B (Marks: 8 each)
2. Construct a diagonal scale of R.F. : 1/5000 to show hundred meters, ten meters and single m eter and long enough to measure up to 500 meters. Also show the distance 467 meters on it.
Ans: Take height:width ratio for lettering as 7:4 and characters as shown in Fig 2.3(a) of ED - Basant Agrawal, TMH.
3. A straight line AB 60 mm long makes an angle of 45 degree to HP and 30 degree to the VP. The end A is 15 mm in front of VP and 25 mm above HP. Draw the projections of the line AB.
Ans: Draw Fig. 11.9(b) of page 11.6 ED - Basant Agrawal, TMH.
4. A right regular pentagonal pyramid, edge of base 25 mm and height 55 mm is held on one of its base corners, such that its axis is inclined at 30o to ground plane and 45o to VP. Draw its projections.
Ans: Refer problem 8.1 page 8.2 of ED - Basant Agrawal, TMH.
5. A cylinder of 45 mm diameter and 60 mm long is resting on one of its bases on HP. It is cut by a section plane inclined at 60 degree with HP and perpendicular to VP passing through a point on the axis 15 mm from its top end. Draw its sectional top view, front view and sectional end view.
Ans: Refer problem 12.20 page 12.22 of ED - Basant Agrawal, TMH.

SECTION C (Marks: 8 each)
6. A right regular square prism, side of base 25 mm and height 50 mm, rests on its base on HP such that it vertical faces are equally inclined to the VP. A horizontal circular hole of diameter 30 mm drilled centrally through it such that the axis of the hole cuts the diagonally opposite vertically edges. Develop its lateral surface.
Ans: Similar to problem 13.21 page 13.20 of ED - Basant Agrawal, TMH.
7. A right circular cone, diameter of base 50 mm and height, resting on its base in HP, is completely penetrated by a cylinder of diameter 25 mm and 70 mm long. The axis of the penetrating cylinder is parallel to both HP and VP and intersects the axis of the cone at a distance of 20 mm from its base. Draw the projection of the solids showing curve of intersection.
Ans: Refer problem 14.14 page 14.17 of ED - Basant Agrawal, TMH.
8. A cylindrical slab 60 mm diameter and 20 mm thick is surmounted by a cube of 28 mm edge. On the top of a cube, rests a square pyramid, attitude 30 mm and side of base 15 mm. The axes of the two solids are in same straight line. Draw isometric projections of the solids.
Ans: Refer problem 15.20 page 15.16 of ED - Basant Agrawal, TMH.
9. Draw the following view of given figure (i) Front view (ii) Top view (iii) Left side view
Ans: Refer artical 7.15 page 7.10-7.13 of ED - Basant Agrawal, TMH.