BT-105 (GS) – Engineering Graphics

An area of 144 sq cm on a map represents an area of 36 sq km on the field. Find the RF of the scale of the map and draw a diagonal scale to show km, hectometres and decametres and to measure up to 10 km. Indicate on the scale a distance 7 km, 5 hectometres and 6 decimetres.

Construct a conic when the distance of its focus from its directrix is equal to 50 mm and its eccentricity is 2/3. Name the curve; mark its major axis and minor axis. Draw a tangent at any point, P on the curve.

The length of the front view of a line CD which is parallel to HP and inclined 30° to VP is 50 mm. The end C of the line is 15 mm in front of VP and 25 mm above HP. Draw the projections of the line and find its true length.

A line PS 65 mm has its end P, 15 mm above the HP and 15 mm in front of the VP. It is inclined at 55° to the HP and 35° to the VP. Draw its projections.

Draw the projections of a pentagonal prism of base 25 mm side and 50 mm long. The prism is resting on one of its rectangular faces in V.P with its axis inclined at 45° to HP.

Draw the isometric view of a hexagonal prism having side of base 25 mm and axis 65 mm long resting on its base on HP.

A right circular cone of axis height 80 mm is resting on one of its generators in HP. Draw its projections. The base is 40 mm dia.

Give some examples where the layering concept is useful to use.

Name and explain five edit commands used in CAD.

Explain the various advantages of CAD.

What is the use of UCS icon? Explain in detail?

Write about Dialog boxes and windows in CAD software.

Explain the various commands used for transformation of an object:

i) Move,

ii) Copy,

iii) Rotate,

iv) Mirror.

Explain the different methods used for drawing a circle in AutoCAD.

Write short notes of the following:

i) Isometric projection

ii) Epicycloid

iii) Basic drawing command