Curves used in Engineering Practices - Conics

For eccentricity in ellipse (e) which relation is correct?

• e < 1

• e = 1

• e > 1

• e = ∞

Figure below represents a section (shaded) obtained due to intersection by a plane that is parallel to the axes of the cones, what it the section called?

• Parabola

• Hyperbola

• Ellipse

• Cycloid

Parabolic curves is not used in ________

• Arches

• Bridges

• Sound reflectors

• Boring

The sections cut by a plane on a right circular cone are called as ______

• Parabolic sections

• Conic sections

• Elliptical sections

• Hyperbolic sections

While cutting, if the plane is at an angle and it cuts all the generators, then the conic formed is called as ______

• Circle

• Hyperbola

• Parabola

• Ellipse

When the plane cuts the cone at angle parallel to the axis of the cone, then _____ is formed.

• Circle

• Hyperbola

• Parabola

• Ellipse

The ratio of the distance from the focus to the distance from the directrix is called as eccentricity.

• True

• False

If the distance from the focus is 10 units and the distance from the directrix is 30 units, then what is the eccentricity?

• 0.3333

• 0.8333

• 1.6667

• 0.0333

If the distance from a fixed straight line is 5mm and the distance from a fixed point is 14mm then what is the value of eccentricity?

• 0.357

• 0.28

• 3.57

• 2.8

The curve which has eccentricity zero is _______

• Parabola

• Ellipse

• Hyperbola

• Circle