A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any x ? Assume incompressible one dimensional flow i.e., no gradients in the radial direction.

August 13, 2022 – by admin

Question: A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit…

A conical tank with a bottom opening of cross-sectional area A is filled with water and is mounted on supports as shown in the figure. What is the force F with which plate X must be pushed up to prevent water from leaking ? Assume that the density of air is negligible as compared to the density of water ρL.

August 13, 2022 – by admin

Question: A conical tank with a bottom opening of cross-sectional area A is filled with water and is mounted on supports as shown in the figure. What is the force F with which plate X must be pushed up to…

For the manometer set up shown in the figure, the pressure difference PA – PB is given by

August 13, 2022 – by admin

Question: For the manometer set up shown in the figure, the pressure difference PA – PB is given by [A]. (ρH – ρair)gH [B]. (ρH – ρL)gH [C]. (ρH – ρL) gH + (ρL – ρair) . g(L – H)…

Molten soap mass is transported by a __________ pump.

August 13, 2022 – by admin

Question: Molten soap mass is transported by a __________ pump. [A]. diaphragm [B]. reciprocating [C]. gear [D]. centrifugal Answer: Option D Explanation: No answer description available for this question.

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 103 VOM + 10.94 x 106 V2OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?

August 13, 2022 – by admin

Question: A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle…

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 103 VOM + 10.94 x 106 V2OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is

August 13, 2022 – by admin

A fluid element has a velocity V = -y2 . xi + 2yx2 . j. The motion at (x, y) = (l/2, 1) is

August 13, 2022 – by admin

Question: A fluid element has a velocity V = -y2 . xi + 2yx2 . j. The motion at (x, y) = (l/2, 1) is [A]. rotational and incompressible [B]. rotational and compressible [C]. irrotational and compressible [D]. irrotational and…

A lubricant 100 times more viscous than water would have a viscosity (in Pa.s)

August 13, 2022 – by admin

Question: A lubricant 100 times more viscous than water would have a viscosity (in Pa.s) [A]. 0.01 [B]. 0.1 [C]. 1 [D]. 10 Answer: Option B Explanation: No answer description available for this question.

A gas (density = 1.5 kg/m3 , viscosity = 2x 10-5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5kg/m3and viscosity of 3 x 10-5kg/m.s flowing at 3 m/s will be

August 13, 2022 – by admin

Question: A gas (density = 1.5 kg/m3 , viscosity = 2x 10-5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m.…

For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is

August 13, 2022 – by admin

Question: For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is [A]. 1 [B]. 0 [C]. < 1 [D].…