GENERAL KNOWLEDGE

Detailed explanation-1: -Critical velocity of a fluid is defined as the velocity up to which the fluid flow is streamlined and above which its flow becomes turbulent. The speed and direction at which a fluid can flow through a conduit without becoming turbulent is another method of defining critical velocity.

Detailed explanation-2: -Critical velocity is the speed and direction at which the flow of a liquid through a tube changes from smooth to turbulent. Determining the critical velocity depends on multiple variables, but it is the Reynolds number that characterises the flow of the liquid through a tube as either turbulent or laminar.

Detailed explanation-3: -Critical velocity is defined as the speed at which a falling object reaches when both gravity and air resistance are equalized on the object. The other way of defining critical velocity is the speed and direction at which the fluid can flow through a conduit without becoming turbulent.