Engg. Drawing 6

Medium thickness, line group of 2 mm are not used for --------------

• out lines

• dotted lines

• Cutting plane - lines

• dimension lines

The point, from which the observer is assumed to view the object, is called

• Center of projection

• Point of projection

• Point of observer

• View point

A square pyramid 50 mm side resting on its base in the HP is cut by a horizontal section plane bisecting its axis, its true shape of section is

• Square of 25 mm side

• Trapezium with parallel side 25 mm and 50 mm

• Square of 50 mm side

• triangle of base 50 mm side

While making isometric projection the ellipse is preferably drawn

• Four center method

• Oblong method

• Concentric circle method

• Parallelogram method

The --------------- is a perspective projection upon a tangent plane, the projecting lines radiating from the center of the sphere

• Polyconic projection

• Mercator projection

• Gnomonic projection

• None of the above

Assuming that a draftsman can plot a distance as small as 0.25 mm and the scale of plotting is 1 in 10,000 the distances in the field can be measured to the nearest

• 0.25 m

• 2.5 m

• 0.025 m

• 25 m

QUESTION 199. The scale should never be used as a (a)   for drawing straight lines.

• Curved edge

• Sharpened edge

• Straight edge

• none of the above

Which BIS code no is recommended for folding of drawing sheets?

• IS 11664 - 1989

• IS 11664 - 1987

• IS 11664 - 1986

• IS 11664 - 1981

______ is used to transfer the true or relative dimension of an object to the drawing.

• Divider

• Scale

• Pencil

• None of them

The point about which a curved shape rotates is known as

• Axis of curve

• Solid centre

• Centre of gravity

• Vertex