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EndsemMay 20242019 patternBE Mech

Turbomachinery SPPU Endsem Question Paper May 2024

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Turbomachinery questions
Subject code
402043
Pattern
2019 pattern
Exam
Endsem
Session
May 2024
Max. marks
50
Time
2 Hours
Semester
VII
Paper code
[6263]-212

Printed for: B.E. (Mechanical Engg.) (End Sem.)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or Q.8.
  2. Neat diagrams must be draw wherever necessary.
  3. Figures to the right side indicate full marks.
  4. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      Explain the functions of following 1. casing of Pelton wheel 2. Notch of bucket 3. Governing mechanism

      Also asked:Nov 2025 ·May 2025

      [6]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [8]

  2. Q2

    1. a)

      Compare Francis and Kaplan Turbine.

      Also asked:May 2025

      [6]
    2. b)

      The extemal and internal diameters of an inward flow reaction turbine are 2m and 1m respectively. The head on the turbine is 60 m. the width of the vane at inlet and outlet are same and equal to 0.25 m. The runner vanes are radial at inlet and discharge is radial at outlet. The speed is 200 rpm and the discharge is 6 m 3 /sec. Determine : i) The vane angle at outlet of the runner and guide blade angle at inlet. ii) The hydraulic efficiency. UNIT - II

      Also asked:May 2025 ·Nov 2024 ·May 2023 ·Nov 2022

      [8]

  3. Q3

    1. a)

      Explain in brief different losses in steam turbine.

      Also asked:May 2025

      [4]
    2. b)

      Following data refer to the single row of impulse steam turbine mean diameter of the blade ring = 1.1 m, Speed = 3000rpm, Nozzle angle = 17 deg., ratio of blade velocity to the steam velocity = 0.45, blade friction factor = 0.82, Blade angle at exit is less by 3 deg to that at inlet, steam mass flow rate = 10.2 kg/s. Draw a velocity diagram and find the following: i) Blade angles at inlet and outlet ii) Tangential force iii) Axial force iv) Power developed.

      Also asked:May 2023

      [8]

  4. Q4

    1. a)

      Explain nozzle governing with sketch.

      [4]
    2. b)

      Steam enters an impulse wheel having a nozzle angle of 20 ° at a velocity of 450 m/s. The exit angle of moving blades is 20 ° and relative velocity of steam may be assumed to remain constant over the moving blades. If the blade speed is 180 m/s, determine : i) Blade angle at inlet, ii) Work done/kg of steam, iii) Power developed when the turbine is supplied with 1.8 kg/s of steam iv) Diagram efficiency UNIT - III

      Also asked:May 2025 ·May 2023

      [8]

  5. Q5

    1. a)

      Explain different types of impellers used for centrifugal pumps.

      Also asked:May 2025

      [6]
    2. b)

      A Centrifugal pump having outer diameter equal to two times inner diameter and running at 1200 rpm works against a total head of 75 m. The velocity of flow through the impeller is constant and is equal to 3 m/s. The vanes are set back at width at an angle of 30 ° at outlet. If the outer diameter of the impeller is 600 mm and width at outlet is 50 mm. Determine : i) Vane angle at inlet ii) Work done per second by impeller. iii) Manometric efficiency

      Also asked:May 2025 ·Nov 2023 ·May 2023

      [6]

  6. Q6

    1. a)

      What do you mean by cavitation? Explain the phenomenon of cavitation in centrifugal pump.

      Also asked:Nov 2025 ·May 2025

      [6]
    2. b)

      A Centrifugal pump running at 900 rpm is working against a head 20m. The external diameter of the impeller is 460 mm and outlet width is 50 mm. If the vane angles at outlet is 40 ° and manometric efficiency is 70%. Determine the following : i) Flow velocity at outlet ii) Absolute velocity of water leaving the vane iii) Angle made by the absolute at outlet with the direction of motion at outlet. iv) Rate of flow through the pump. UNIT - IV

      Also asked:May 2025 ·May 2023

      [6]

  7. Q7

    1. a)

      Explain Construction and working of centrifugal compressor with neat diagram.

      Also asked:May 2023

      [6]
    2. b)

      A centrifugal compressor delivers 16.5 kg/s of air with a total head pressure ratio of 4:1. The speed of the compressor is 15000 rpm. Inlet total head temperature is 20 C, slip factor 0.9, power input factor 1.04 and 80% isentropic efficiency. Calculate : i) Overall diameter of impeller ii) Power Input

      [6]

  8. Q8

    1. a)

      Explain in detail surging and choking phenomenon in centrifugal compressor.

      Also asked:May 2025 ·Nov 2023 ·Nov 2022

      [6]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [6]