a) Fill in the blanks.

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

ii) In the orthographic projection, the projectors are __________ to the plane of projection.

iii) In the first angle projection, the object is imagined to be placed __________.

iv) In __________ projection, any view is so placed that it represents the side of the object nearer to it.

v) In half sectional view, __________ of the object is imagined to be removed.

vi) Sectional views reveal __________.

vii) Graphics can be converted into hard copy with a __________.

b) Draw an angle of $45^\circ$ and $135^\circ$ with the help of Scale of Chords.

a) The distance of 352 km between two cities, on a road map, is represented by a line of length 70.4 mm. Draw a diagonal scale to read up to single kilometer and long enough to measure up to 900 km. show on the scale a distance of 649 km.

b) Construct a Conic section having eccentricity of $3/4$ and focus 25 mm from directrix. Measure its major and minor axes and the distance between two foci.

a) The plan of a line PQ 75 mm long, measures 54 mm. The midpoint of the line is 50 mm from VP and 15 mm from the HP. The point Q is 24 mm from the VP. Draw its projections and find the inclinations with HP and VP. Also locate its traces.

b) A regular hexagonal lamina 30 mm side has a corner on HP. Its surface is inclined at $45^\circ$ to the HP and the plan of the diagonal through the corner, which is in the HP makes an angle of $45^\circ$ with the VP. Draw its projections.

a) What is meant by Projection? Explain the principle of projection and Differentiate between First Angle and Third Angle Projections.

b) 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 bicycle has a 650 mm diameter wheels. Draw the locus of a point P on the circumference of a wheel for its complete revolution when it passes over a segmental arched culvert of radius 1950 mm.

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) What is CAD? Name two CAD softwares. Give advantages and limitations of using CAD.

Write short note on: (any two)

i) View ports

ii) Layering concept

iii) Edit commands used in CAD