1. Define density?  Ans: It is defined as the ratio of mass per unit volume of the fluid.   2. Define viscosity?  Ans: It is defined as the property of fluid which offers resistance to the movement of fluid over another adjacent layer of the fluid.   3. Differentiate between real fluids and ideal fluids?  Ans: A fluid, which is in-compressible and is having no viscosity, is known as ideal fluid while the fluid, which possesses viscosity, is known as real fluid.   4. What is a venturimeter?  Ans: It is a device which is used for measuring the rate of flow of fluid flowing through pipe.   5. What is a notch?  Ans: A notch is a device used for measuring the rate of flow of a fluid through a small channel or a tank.   6. Define buoyancy?  Ans: When a body is immersed in a fluid, an upward force is exerted by the fluid on the body. This upward force is equal to the weight of the fluid displaced by the body.   7. Define meta-centre?  Ans: It is defined as the point about which a body...
 























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