89) When a material has uniform properties in all directions or orientations, then it is called

90) Which of the following is an anisotropic material?

91) Which of the following is the ratio of the dynamic viscosity to the density of the fluid ?

92) The point in a fluid stream where the diameter of the stream is the least, and fluid velocity is at its maximum is known as

93) In the context of fluid mechanics, the ratio of the loss of head of fluid, issuing from an orifice or passing over a weir, to the remaining head is known as