Gujarat Technological UniversitySummer 2026 examination

GTU 3141906 Fluid Mechanics and Hydraulics Machines Summer 2026 Question Paper & PDF

B.E. · Mechanical Engineering · Semester 4 · Subject code 3141906
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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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3 of 25 questions on this paper were also asked in other years. Each is marked below with the years it appeared.See all 3 repeated 3141906 questions, most asked first

Q.1

14 Marks
(a)
3 marks
Define the following terms
i)kinematic viscosity
ii)meniscus effect
iii)specific gravity
(b)
4 marks
Explain effect of temperature on viscosity of the fluid
(c)
7 marks

State and prove Bernoulli’s equation. List the assumptions which are made while deriving Bernoulli’s equation. What are the limitations of the Bernoulli’s equation?

Q.2

14 Marks
(a)
3 marks
Discuss types of equilibrium of floating body.
(b)
4 marks
Derive general equation of variation of pressure due to gravity.
(c)
7 marks
Explain governing of Impulse turbines.
(c)
7 marks
Give differences between impulse and reaction turbine

Q.3

14 Marks
(a)
3 marks
Define absolute pressure, gauge pressure and vacuum pressure.
(b)
4 marks

A block of wood of specific gravity 0.7 floats in water. Determine the metacentric height of the block if its size is 2mX1mX0.8m. Height of block is 0.8 m

(c)
7 marks
Explain Reynold’s experiment with proper diagrams.

Distinguish between Laminar and Turbulent flow.

(a)
3 marks

What are repeating variables? How are these selected by dimensional analysis?

(b)
4 marks
Explain the concept of hydraulic gradient and total energy lines.
(c)
7 marks

A pelton wheel of 2.5 m diameter operates under the following conditions : Net available head = 300 m; speed = 300 rpm; Blade angle at outlet = 165°; Cv of the jet = 0.98 ; Blade friction coefficient = 0.95 ; jet diameter = 20 cm ; Mechanical efficiency = 95% . Determine

i)the power developed
ii)specific speed
iii)hydraulic efficiency

Q.4

14 Marks
(a)
3 marks
Define equipotential line, stream line and flow net.
(b)
4 marks

Check whether the flow of liquid given by u = 5x and v = -5y is continuous or rotational

(c)
7 marks

Derive the equation of maximum efficiency of series of moving curved vanes configuration.

(a)
3 marks
Derive equation of flow over rectangular notch.
(b)
4 marks
List out and explain various heads in a centrifugal pump
(c)
7 marks

Oil of viscosity 0.05 N-s/m² is flowing between two stationary parallel plates 1 m wide and maintained 10 mm apart. The velocity midway between the plates is 3 m/s. Find

i)pressure gradient along the flow
ii)average velocity
iii)discharge of oil.

Q.5

14 Marks
(a)
3 marksAsked in 2 of 2 papers
Explain the function of draft tube in the case of reaction turbines

Also asked in Summer 2025 Q5b OR

(b)
4 marksAsked in 2 of 2 papers

What is similitude? Define Geometric, Kinematic and Dynamic similarity

Also asked in Summer 2025 Q3a OR

(c)
7 marks
Explain characteristics curves of centrifugal pump.
(a)
3 marks
What are major and minor energy losses?
(b)
4 marksAsked in 2 of 2 papers
State and derive Pascal;s law.

Also asked in Summer 2025 Q3b

(c)
7 marks

With neat sketch explain construction and working of hydraulic accumulator

More Fluid Mechanics and Hydraulics Machines papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Summer 202570 marks · 5 questions

Other Semester 4 subjects

BE Mechanical

2141905
Complex Variables and Numerical Methods
3141901
Mechanical Measurement and Metrology
3141907
Fundamentals of Machine Design
3141908
Manufacturing Processes

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About this paper

Official Gujarat Technological University (GTU) examination paper for Fluid Mechanics and Hydraulics Machines (Summer 2026, B.E. · Mechanical 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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