GATE CH topic:fluid-mechanics-and-mechanical-operations PYQs & Answers — Page 2

Questions 11–20 of 77. Imported answers require independent review unless marked reviewed.

The velocity profile for a fully developed laminar flow of an incompressible Newtonian fluid, at steady state, through a horizontal infinitely wide and long slit of gap 0.01 m is given by the following equation.

where y is the vertical distance measured from the center of the slit. The average velocity of the fluid (in m s⁻¹) is __________ (rounded off to the nearest integer).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The sum of the components of the force due to pressure and shear at the solid-fluid boundary of a solid body in the direction normal to the flow is

Your answerChoose one option.

Drag

Friction

Lift

Buoyancy

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Choose the CORRECT option for pathlines, streaklines and streamlines for a STEADY flow field.

Your answerChoose one option.

All three lines are identical

Only pathlines and streaklines are identical

Only pathlines and streamlines are identical

Only streamlines and streaklines are identical

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A catalyst particle is modeled as a symmetric double cone solid as shown in the figure. For each conical sub-part, the radius of the base is

and the height is

. The sphericity of the particle is given by

Diagram for Chemical Engineering question 41

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

For a steady state, fully developed laminar flow of a Newtonian fluid through a cylindrical pipe at a constant volumetric flow rate, which of the following statements regarding the pressure drop across the pipe (

) is/are TRUE?

Your answerSelect all correct options. You can choose more than one.

increases with fluid viscosity

increases with pipe length

increases with pipe diameter

remains unchanged with fluid viscosity

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A leaf filter is operated at 1 atm (gauge). The volume of filtrate collected (

in m

) is related with the volumetric flow rate for the filtrate (

in m

/s) as:

The volumetric flow rate of the filtrate at 1 hour is ____

/s (rounded off to 2 decimal places).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An adiabatic pump of efficiency 40% is used to increase the water pressure from 200 kPa to 600 kPa. The flow rate of water is 600 L/min. The specific heat of water is 4.2 kJ/(kg °C). Assuming water is incompressible with a density of 1000 kg/m

, the maximum temperature rise of water across the pump is ____ °C (rounded off to 3 decimal places).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An infinitely long cylindrical water filament of radius

is surrounded by air. Assume water and air to be static. The pressure outside the filament is

and the pressure inside is

. If

is the surface tension of the water-air interface, then

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The velocity field in an incompressible flow is

, where

and

are unit-vectors in the

Cartesian coordinate system. Given that

and

are constants, and

, the correct expression for

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

If the Prandtl number

, which of the following statements is/are correct?

Your answerSelect all correct options. You can choose more than one.

The moment diffusivity is much larger than the thermal diffusivity.

The thickness of the momentum boundary layer is much smaller than that of the thermal boundary layer.

The thickness of the momentum boundary layer is much larger than that of the thermal boundary layer.

The momentum diffusivity is much smaller than the thermal diffusivity.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE CH topic:fluid-mechanics-and-mechanical-operations PYQs

Question 65

Question 18

Question 19

Question 41

Question 43

Question 49

Question 50

Question 15

Question 16

Question 27