What is the exam pattern and passing mark for GTU Fluid Flow Operation (BE04005031)?

The GTU theory examination carries 70 total marks with a duration of 2.5 Hours. Minimum passing criteria is 23 marks (33%). The paper consists of 5 main questions with official marking breakdown and internal choices.

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The official GTU question paper PDF is linked directly from Gujarat Technological University's official examination archive. You can view the full paper online or download the original file.

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Gujarat Technological UniversitySummer 2026 examination

GTU BE04005031 Fluid Flow Operation Summer 2026 Question Paper & PDF

B.E. · Chemical Engineering · Semester 4 · Subject code BE04005031

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Total: 70 marks
To pass: 23 marks (33%)
Duration: 2.5 Hours 10:30 AM – 1:00 PM
Questions: 5 with internal choice

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Q.1

14 Marks

(a)

3 marks

Discuss the effect of surface roughness on fluid flow through pipes.

(b)

4 marks

Write down the simplified pressure drop equation for a fully fluidized bed. Explain why the pressure drop remains constant even if the velocity is increased beyond (

u_{mf}

(c)

7 marks

Water is flowing through a $45\text{ mm}$ internal diameter pipe at the rate of $1\text{ kg/s}$ . Calculate the pressure drop over a length of $500\text{ meters}$ . Data : Friction factor $\text{'f'} = 0.0002$ , Density of water $= 1000\text{ kg/m}^3$ , Viscosity of water $= 8.0 \times 10^{-4}\text{ Pa . s}$ .

Q.2

14 Marks

(a)

3 marks

Briefly describe the flow of fluid in boundary layers.

(b)

4 marks

Describe the classic Reynolds Experiment with a neat schematic diagram. Explain how it distinguishes between laminar, transition, and turbulent flow regimes based on critical Reynolds numbers for a pipe flow.

(c)

7 marks

A Venturi meter is installed in a pipe line for the measurement of flow rate of water. The pressure drop across the throat and upstream of the meter is $15\text{ centimeters}$ of mercury. Calculate the volumetric flow rate of water in $\text{m}^3\text{/s}$ . Data:- Diameter of throat $= 25\text{ mm}$ , Diameter of pipe $= 35\text{ mm}$ , Coefficient of meter $= 0.94$ , Density of water $= 1000\text{ kg/m}^3$ ,Density of mercury $= 13600\text{ kg/m}^3$

(c)

7 marks

Acetic acid is to be pumped through a horizontal pipeline at a steady rate. Given the operational parameters and fluid properties below, determine the total pressure drop experienced over the specified length of the pipeline.

Volumetric Flow Rate (Q)	$0.03\text{ m}^3\text{/s}$
Pipe Internal Diameter (D)	$85\text{ mm}\ (0.085\text{ m})$
Pipeline Length (L)	$60\text{ m}$
Density of Acetic Acid ( $\rho$ )	$1100\text{ kg/m}^3$
Viscosity of Acetic Acid ( $\mu$ )	$0.0075\text{ (N·s)/m}^2$

Q.3

14 Marks

(a)

3 marks

Describe the rheological behavior of Newtonian and non-Newtonian fluids.

(b)

4 marks

Explain asterisk condition and stagnation condition. Derive the expression for Stagnation temperature.

(c)

7 marks

In an air pipeline, the flow has following conditions at station 1 : Temperature

= 300\text{ K}

, pressure

= 2.8\text{ bar}

, velocity

= 16\text{ m/s}

and pipe inside the diameter

= 60\text{ mm}

. The conditions at station 2 are : Temperature

= 300\text{ K}

, pressure

= 2.3\text{ bar}

and pipe inside the diameter

= 85\text{ mm}

. Density of air at

300\text{ K}

and

2.8\text{ bar}

pressure is

4.1\text{ kg/m}^3

. Estimate the mass flow rate of air and the velocity at station 2.

(a)

3 marks

Distinguish between notch and weir.

(b)

4 marks

Discuss in brief about assembly used for prevention of leakages around moving parts of machine.

(c)

7 marks

Estimate the size of a pipe required to convey $35\text{ l/s}$ of an oil to a distance of $3\text{ km}$ with a frictional head loss of $42\text{ m}$ . Data : Kinematic viscosity of oil is $10^{-2}\text{ m}^2\text{/s}$ .

Q.4

14 Marks

(a)

3 marks

What are the advantages of Centrifugal pump over Reciprocating pump?

(b)

4 marks

Differentiate: Variable head meter and variable area meter.

(c)

7 marks

A rotameter has a

10\text{ cm}

tube with bottom ID of

20\text{ mm}

and top ID of

25\text{ mm}

. The float has a volume of

5\text{ cm}^3

and density of

4500\text{ kg/m}^3

. Calculate the flow rate of water (

\rho = 1000\text{ kg/m}^3

) when the float is at the midpoint.

(a)

3 marks

What do you mean by subsonic, sonic and supersonic flows.

(b)

4 marks

Explain in brief about isentropic flow of compressible fluid through nozzle.

(c)

7 marks

A V-element meter is installed in a

100\text{ mm}

ID pipe. Calculate the volumetric flow rate given the following parameters:

Pipe Diameter (D)	$100\text{ mm}\ (0.1\text{ m})$
Beta Ratio ( $\beta$ )	0.65
Differential Pressure ( $\Delta P$ )	$12{,}000\text{ Pa}\ (12\text{ kPa})$
Gas Density ( $\rho$ )	$0.75\text{ kg/m}^3$
Discharge Coefficient (Cd)	0.82
Expansion Factor (Y)	0.98

Q.5

14 Marks

(a)

3 marks

Discuss Suction lift in centrifugal pumps

(b)

4 marks

Explain any one method of dimensional analysis giving an example

(c)

7 marks

A mild steel pipeline of $300\text{ mm}$ inside diameter is to be installed for transporting $20\text{ kg/s}$ of molasses. The pipeline is $3000\text{ m}$ long and the delivery end is to be $8\text{ m}$ higher than the intake. Calculate the power requirement for the pump if the efficiency of the pump is $70\%$ . Data : Density of molasses $= 1600\text{ kg/m}^3$ and $\mu$ of molasses $= 0.5\text{ Pa.s}$

(a)

3 marks

Explain Drag and drag coefficient.

(b)

4 marks

Discuss in brief continuous gravity decanter.

(c)

7 marks

A liquid of density

1500\text{ kg/m}^3

is flowing from point A to point B which is

10\text{ meters}

above the point A. The frictional losses in a pipeline of internal diameter

60\text{ mm}

are

2\text{ J/kg}

for a volumetric flow rate of

800\text{ cm}^3\text{/s}

. If points A and B are at the atmospheric pressure and the velocity at the point A is zero, calculate the pump work done.

Other Semester 4 subjects

BE Chemical

3140503

Heat Transfer

3140507

Chemical Engineering Thermodynamics II

3140508

Unit Processes & Chemical Technology

3140509

Pollution control & safety Management

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About this paper

Official Gujarat Technological University (GTU) examination paper for Fluid Flow Operation (Summer 2026, B.E. · Chemical Engineering, Sem 4). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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