a) Fill in the blanks.

i) The number of mutually perpendicular planes that may surround an object in space is _________.

ii) In the third angle projection, the object is imagined to be placed _________.

iii) In half sectional view, _________ of the object is imagined to be removed.

iv) In the orthographic projection, the projectors are _________ to the plane of projection.

v) Hatching lines are drawn at an angle of _________ to the axis or to the main outline of the sections.

vi) Graphics can be converted into hard copy with a _________.

vii) Mass prop provides _________ for solid.

b) What are Scale? Classify its different types, also describe how RF is calculated.

a) A rectangular plot of land area 0.45 hectare, is represented on a map by a similar rectangle of 5 sq. cm. Calculate the RF of the map, Also draw a scale to read up to single metre from the map, the scale should be long enough to measure up to 400 metres.

b) An inelastic string is unwound to a length of 122 mm from a drum of $\phi$ 30 mm. Draw the locus of free end of the string which is held taut during unwinding.

a) The projections a'b' and ab of a line AB are 65 mm and 50 mm long, respectively. The midpoint of the line is 38 mm in front of VP and 30 mm above HP. End A is 10 mm in front of the VP and nearer to it. End B is nearer to the HP. Draw the projections of the line, find its true length.

b) A regular hexagonal lamina 40 mm side has a square hole of 25 mm side centrally cut through it. Draw its projections when it is resting on one of its sides on HP with its surface inclined at $60^\circ$ to VP and its corner nearest to VP is 24 mm from VP.

A triangular prism of side of base 30 mm and axis 55 mm long lies on one of its rectangular faces in HP with its axis parallel to VP. Draw its Projection.

A right regular square pyramid, edge of base 35 mm and height 50 mm, rest on its base on HP with its base edges equally inclined to VP. A section plane perpendicular to VP and inclined to HP on $32^\circ$, cuts the pyramid bisecting its axis. Draw the projections and true shape of the section of truncated pyramid.

a) Develop the lateral surface of an oblique cone, diameter of the base 40mm and height 40 mm having its axis inclined at $60^\circ$ to its base.

b) A right circular cone, diameter of base 50 mm and axis 62 mm long, rest on its base rim on HP with its axis parallel to VP and one of the elements perpendicular to HP. Draw the projections.

a) A cube 30 mm edge is placed centrally on the top of a cylindrical block of $\phi$ 52 mm and 20 mm height. Draw the isometric drawing of the solid.

b) Explain the purpose of Zoom Command.

Write short note on : (any two)

i) View ports

ii) Layering concept

iii) Type of projections