Question 2: (0.5x8 4 marks) Write True (T) or False (F) on the following: When w

Question

Question 2: (0.5x8 4 marks) Write True (T) or False (F) on the following: When water is flowing through a pipe, the fluid boundary layer is formed near the pipe surface. The value of Guage pressure is less than Absolute pressure Tooth paste is a Newtonian fluid a) b) c) d) Your friend has a botle ful of water in his desk. Shear stress acting on the water in zero F e) Viscosity of gas increases with increase in temperature f) Dynamic pressure can be expressed as "density'g'height 8) A gas is flowing through a pipeline. Gas pressure at two di kPa and 400 kPa. Bernoulli equation can be applicable in this case The value of Efficiency of a turbine can be 0.70. h)

Explanation / Answer

A) false

boundary layer forms at a point where

flow velocity = 99% of 'free stream' velocity.

B) true

Absolute pressure = atmospheric pressure + Guage pressure

C) false

Toothpaste is non newtonian fluid, Bingham plastic fluid

D) true

At the rest condition of the fluid, there is no velocity gradient exist between the layers of fluid. From the Newtonian law, Shera stress will be zero.

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