Hydraulics and Fluid Mechanics in ME
The hammer blow in pipes occurs when

There is excessive leakage in the pipe
The flow of fluid through the pipe is gradually brought to rest by closing of the valve
The pipe bursts under high pressure of fluid
The flow of fluid through the pipe is suddenly brought to rest by closing of the valve

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Hydraulics and Fluid Mechanics in ME
The kinematic viscosity is the

Ratio of density of the liquid to the absolute viscosity
Product of absolute viscosity and density of the liquid
Ratio of absolute viscosity to the density of the liquid
Product of absolute viscosity and mass of the liquid

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