Question

What is the surface generated by a straight line which moves along a fixed curve, and which remains parallel to a fixed line not on the curve?

a) Conical Surface b) Cylindrical Surface c) Circular Cylinder d) Right Cone

Answer 1

The surface generated by a variable line which remains parallel to a fixed line and intersects a given curve (or touches a given surface) is called a cylinder.

The variable line is called the generator, the fixed straight line is called the axis of the cylinder and the given curve is called the guiding curve of the cylinder.

c) Circular Cylinder