B.TechSemester 32025-26Fluid Mechanics Fluid MachinesBME302
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Fluid Mechanics Fluid Machines (BME302) - AKTU Question Paper 2025-26

B.Tech · Semester 3 · Free PDF Download

This is the official AKTU Fluid Mechanics Fluid Machines Previous Year Question Paper for B.Tech Semester 3, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 3
Session:2025-26
University:AKTU / UPTU

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Questions Asked in 2025-26

Fluid Mechanics Fluid Machines (BME302) — complete question paper · 70 marks · 3 Hours

Section AAttempt all q u e s t i o n s i n b r i e f . 02 x 7 = 14
  • a
    Discuss the effect of temperatu re on viscosity of (i) liquids and (ii) gases
  • b
    Define compressibility and bulk modulus. 1 K 1
  • c
    Differentiate between rotationa l and irrotational flows
  • d
    Define Froude’s Number, di scuss its significance
  • e
    Formulate the Darcy-Weisbach e quation in terms of discharge (Q)
  • f
    Distinguish between Impulse and Reaction turbines
  • g
    Explain briefly, priming of a centrifugal pump
Section BAttempt any three o f t h e f o l l o w i n g : 07 x 3 = 21
  • a
    Extend the following: (i) Newton’s law of viscosity (ii) Absolute Pressure, Gau ge Pressure and Vacuum Pressure
  • b
    Derive the continuity equation in Cartesian coordinates, for steady flow of an incompressible fluid
  • c
    With suitable diagram, illustrate the effect of pressure gra dient on Boundary Layer Separation. Identi fy the conditions for separate d and unseparated flow
  • d
    Illustrate the velocity triangles for Pelton wheel and deriv e the expressions for work done by water striking on runner, and maximum hydrauli c efficiency of Pelton wheel
  • e
    Derive the expression of minim um speed for starting a centrifugal pump
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 07 x 1 = 07
  • a
    The inlet and throat diameter s of a horizontal venturimeter are 30 cm and 10 cm respectively. The liquid fl owing through the meter is wat er. The pressure intensity at inlet is 13.734 N/cm 2 while the vacuum pressure head at the throat is 37 cm of mercury. Find: (i) the rate of flow (ii) value of Cd for the venturimeter. Assume that 4% of the differential head is lost between inlet and throat
  • b
    Describe surface tension. Also mention its units and dimensi onal formula. Find the surface tension in a soap bubble of 40 mm diameter whe n the inside pressure is 2.5 N/m2 above atmospheric pressure
  • a
    The stream function for a two dimensional flow is given by ψ = 2xy. Find: (i) velocity at point P(2,3) (ii) Velocity Potential Function Φ
  • b
    Explain rotational and irrotational flow. A fluid flow is given by V = 8x3i – 10x2yj. State whether the flow is rotational or irrotational
  • a
    Outline the following: (i) Frictional loss in pipe flow (ii) Prandtl Mixin
  • g
    Length theory for turbulent shear stress
  • b
    A fluid of viscosity 0.7 Ns/m 2 and specific gravity 1.3 is flowing through a circular pipe of diameter 100 mm. The maximum shear stress at t he pipe wall is given as 196.2 N/m2, find: (i) pressure gradient (ii) average velocity
  • a
    Explain the Governing of Pelt on Turbine with neat sketch
  • b
    A jet of water of diameter 50 mm moving with a velocity of 40 m/s, strikes
  • a
    curved fixed symmetrical plate at the centre. If the jet is d eflected through an angle of 120◦ at the outlet, find: (i) rate of flow of water (ii) Force exerted by the jet of water in the direction of jet
  • a
    Explain the phenomenon of cavitation. Discuss the effects of cavitation in centrifugal pumps, also outline some precautions against cavitation
  • b
    A single stage centrifugal pum p with impeller diameter of 30 cm rotates at 2000 r.p.m. and lifts 3 m 3 of water per second to a height of 30 m with an efficiency of 75%. Find the numbe r of stages and diameter of ea ch impeller of a similar multistage pump to lift 5 m 3 of water per second to a height of 200 m when rotating at 1500 r.p.m

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — BME302

Questions that appeared in more than one session, found by comparing 2 years of Fluid Mechanics Fluid Machines papers (2023-24, 2025-26)

2x

Differentiate between rotationa l and irrotational flows

Appeared in: 2023-24 · 2025-26

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