3. What is the C.G. of an isosceles triangle of base 20 cm and side 40?
(a) 12.90 cm (b) 13.28 cm (c) 19.36 cm (d) 38.72 cm

4. The side view of an object is drawn in:
(a) Vertical plan
(b) Horizontal plane
(c) Profile plan
(d) All of the above.

5. The following is used for a dimension line:
(a) Continuous thick (b) Continuous thin (c) Chain thin line (d) Short zigzag thin