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GATE ME: Fluid Mechanics & Fluid Machinery Champion Quiz 3
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Question 1
For the stability of a floating body, under the influence of gravity alone, which of the following is TRUE?
Question 2
Which among the following information is correct in case of a Bend?
Question 3
For an incompressible flow field, 
, which one of the following conditions must be satisfied?
, which one of the following conditions must be satisfied?Question 4
Within a boundary layer for a steady incompressible flow, the Bernoulli equation
Question 5
Oil flows through a 200 mm diameter horizontal cast iron pipe (friction factor, f = 0.0225) of length 500m. The volumetric flow rate is 0.2 m3/s. The head loss (in m) due to friction is (assume g = 9.81 m/s2)
Question 6
Two pipelines, one carrying oil (mass density 900 kg/m3) and the other water, are connected to a manometer as shown in the figure. By what amount the pressure in the water pipe should be increased so that the mercury levels in both the limbs of the manometer become equal? (Mass density of mercury = 13,550 kg/m3 and g = 9.81 m/s2) 
Question 7
A venturimeter of 20 mm throat diameter is used to measure the velocity of water in a horizontal pipe of 40 mm diameter. If the pressure difference between the pipe and throat sections is found to be 30 kPa then, neglecting frictional losses, the flow velocity is
Question 8
A steady laminar boundary layer is formed over a flat plate as shown in the figure. The free stream velocity of the fluid is Uo. The velocity profile at the inlet a-b is uniform, while that at a downstream location c-d is given by u = Uo
.
The ratio of the mass flow rate, 𝑚𝑏, leaving through the horizontal section b-d to that entering through the vertical section a-b is ___________
. The ratio of the mass flow rate, 𝑚𝑏, leaving through the horizontal section b-d to that entering through the vertical section a-b is ___________
Question 9
The pressure drop for a relatively low Reynolds number flow in a 600 mm diameter pipe, 30 m long pipeline is 70 kPa. What is the wall shear stress?
Question 10
An inverted U-tube manometer is used to measure the pressure difference between two pipes A and B, as shown in the figure. Pipe A is carrying oil (specific gravity = 0.8) and pipe B is carrying water. The densities of air and water are 1.16 kg/m3 and 1000 kg/m3, respectively. The pressure difference between pipes A and B is __________kPa.
Acceleration due to gravity g = 10 m/s2.
Acceleration due to gravity g = 10 m/s2.
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