# Problem 3.10 Engineering Curves

Problem 3.10 Engineering Curves – Construct a parabola by tangent method with the base dimension 140 mm and height 100 mm.

# Problem 3.9 Engineering Curves

Problem 3.9 Engineering Curves – Construct a parabola by parallelogram method with the base dimension 140 mm and height 100 mm. The base of the parabola makes an angle of 25° with the horizontal. And also draw the tangent and normal to the parabola at any suitable point.

# Problem 3.8 Engineering Curves

Problem 3.8 Engineering Curves – Construct a parabola by rectangle method with the base dimension 140 mm and height 100 mm. And also draw the tangent and normal to the parabola at any suitable point.

# Problem 3.7 Engineering Curves

Problem 3.7 Engineering Curves – Draw an ellipse by oblong method. Size of the rectangle is 140 mm X 100 mm. Draw the tangent and normal to the ellipse at any suitable point.

# Problem 3.6 Engineering Curves

Problem 3.6 Engineering Curves – Construct an ellipse by arcs of circle method. The major and minor axes are 140 mm & 100 mm respectively. Also draw the tangent and normal to the ellipse at any suitable point.

# Problem 3.5 Engineering Curves

Problem 3.5 Engineering Curves – Construct an Archemedian spiral for one and half convolution. The greatest and the least radii being 50 mm and 14 mm respectively. Draw tangent and normal to the spiral at a point 40 mm from the center.

# Problem 3.4 Engineering Curves

Problem 3.4 Engineering Curves – A string is unwound from a circle of 30 mm radius. Draw the locus or Involute of circle of the end of the string for unwinding the string completely. String is kept tight while being unwound. Draw normal and tangent to the curve at any point.

# Problem 3.3 Engineering Curves

Problem 3.3 Engineering Curves – A circle of 50 mm diameter rolls on and in another fixed circle of radius 80 mm. Draw the epicycloid and hypocycloid for the point P on the rolling circle, which is at the contact point of the rolling and fixed circles.