B.TechSemester 52024-25Turbo MachinesBME055
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Turbo Machines (BME055) - AKTU Question Paper 2024-25

B.Tech · Semester 5 · Free PDF Download

This is the official AKTU Turbo Machines Previous Year Question Paper for B.Tech Semester 5, academic session 2024-25. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 5
Session:2024-25
University:AKTU / UPTU

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Questions Asked in 2024-25

Turbo Machines (BME055) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 07 = 14
  • a
    Compare turbo machines with positive displacement machines
  • b
    Define Polytropic Efficiency?
  • c
    What is the utilization fact or in turbo machines?
  • d
    What is the Parsons’s turbine? Explain its working principle
  • e
    Define Net Positive Suction Head
  • f
    What is manometric efficienc y?
  • g
    Why does slip occur in cen trifugal compressors?
Section BAttempt any three of the following: 07 x 3 = 21
  • a
    Define the various performance parameters and coefficients u sed in turbo machinery in detail
  • b
    Obtain an expression for the polytropic efficiency for a com pressor in terms of temperature, pressure and adiabatic index
  • c
    Explain what is meant by velocity compounding of a multistag e impulse turbine
  • d
    Discuss the significance of sp ecific speed in the selection and design of hydraulic turbines
  • e
    Define slip factor related to centrifugal compressor and der ive its equation
Section CAttempt any one part of the following: 07 x 1 = 07
  • a
    Define Turbo machine. With neat sketch explain the principal parts of general turbomachine
  • b
    What is the reheat factor in t he context of expansion proces ses? How does it affect the efficiency of a turbo machine?
  • a
    Obtain the Euler’s energy equation for turbo machines and st ate its relevance
  • b
    What is the principle of opera tion of axial flow compressor? Explain with suitable sketch. Also explain the performance characteristics curve of axial flow compressor
  • a
    Steam at 4.9 bar and 160°C is supplied to a single stage imp ulse turbine at the rate of 60 kg/min. From there, it is exhausted to a cond enser at a pressure of 0.196 bar. The blade speed is 300 m/s. The nozzles are inclined at 25° to the plane of the wheel and outlet blade angl e is 35°. Neglect friction losses and estimate (a) the theoretical power developed by the turbine, (b) the diagram efficiency, and (c) the stage efficiency
  • b
    Explain the principle, construction and working of reaction turbine
  • a
    How do the losses in the draft tube effect the pressure at r unner exist?
  • b
    A single jet Pelton wheel runs at 300 r.p.m. under a head of 510 m. The jet diameter is 200 mm, its defl ection inside the bucket is 165 ° and its relative velocity is reduced by 15% due to friction. Determine: (i) Water power, (ii) Resultant force on the bucket, and (iii) Overall ef ficiency. Take: Mechanical losses = 3%, co-efficient of velocity = 0.98, and speed ratio = 0.46
  • a
    What do you mean by 'characteristics of centrifugal pump'? A lso explain various characteristics curves of centrifugal pump?
  • b
    A centrifugal compressor handles 180 kg/min of air. The suct ion pressure and temperature are 1 bar and 300 K. The suction veloc ity is 90 m/s. The delivery conditions are 2 bar, 400 K, and 240 m/s. Calculate
  • a
    the isentropic efficiency, (b ) the power required to drive the compressor, and (c) the overall efficiency of the unit. Take cp = 1.005 kJ/kg. K. Assume that entire kinetic energy gained in the impel ler is converted into pressure in the diffuser

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.

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