Important RGPV Question
ME-603 (A), Turbo Machinery
VI Sem, ME
UNIT 1 – Energy Transfer in Turbo Machines
Q.1) Explain the application of the second law of thermodynamics to the turbo machines. (RGPV MAY 2024) Q.2) Derive the moment of momentum and Euler turbine equation for turbo machine. (RGPV MAY 2024)
Q.3) Write a short note on degree of reaction of turbo machinery. (RGPV MAY 2024)
Q.4) Which is called Euler’s equation for reaction turbine? What is Euler’s energy equation? (RGPV MAY 2023)
Q.5) Describe the second law of thermodynamics and how it is related to a boiler.(RGPV MAY 2022)
Q.6) What is the role of entropy in the definition of the second law of thermodynamics? (RGPV MAY 2022)
UNIT 2 – Steam Turbines
Q.1) The velocity of steam at inlet to a simple impulse turbine is 1000 m/s and nozzle angle is 20° The blade speed is 400 m/s and the blades are symmetrical Calculate blade angles. tangential force on blade, diagram power, axial thrust and diagram efficiency for a mass flow rate of 0.75 kg/s Neglect friction losses. (RGPV MAY 2024)
Q.2) Derive an expression for optimizing blade efficiency in an impulse steam turbine . (RGPV MAY 2024)
Q.3) Explain various losses in turbine. (RGPV MAY 2024)
Q.4) Write short notes on the following: (RGPV MAY 2024)
a) Velocity and pressure compounding in steam turbines
b) Governing of steam turbines
Q.5) What is degree of reaction in turbomachinery? What is a 50% reaction turbine? (RGPV MAY 2023)
Q.6) Describe velocity and pressure compounding of steam turbine. (RGPV MAY 2023)
Q.7) What are the factors that affect the performance of steam turbines? What is the condition of maximum efficiency of turbine? (RGPV MAY 2023)
Q.8) Dry saturated steam is expanded in a nozzle from 1.3 MPa to 0.1 MPa. Assume friction loss in the nozzle is equal to 10% of the total enthalpy drop; calculate the mass of steam discharged when the nozzle exit diameter is 10 mm. (RGPV MAY 2023)
Q.9) Write down the expression for equivalent evaporation for steam generator. (RGPV MAY 2022)
Q.10) Describe any one type of boiler in detail. (RGPV MAY 2022)
Q.11) Draw velocity diagram of impulse steam turbine. (RGPV MAY 2022)
Q.12) How velocity diagram of steam turbine and hydro turbine are related to each other? (RGPV MAY 2022)
Q.13) Find out the expression for power produced for any steam turbine. (RGPV MAY 2022)
Q.14) Explain the term degree of reaction for steam turbine. (RGPV MAY 2022)
Q.15) Write down the effect of blade and nozzle losses on vane efficiency. (RGPV MAY 2022)
Q.16) What do you mean by stage efficiency of steam turbine? (RGPV MAY 2022)
UNIT 3 – Water Turbines
Q.1) What is a draft tube? Explain the different in types of draft tubes. (RGPV MAY 2024)
Q.2) A Pelton wheel is to be designed for a head of 60m when running at 200 r.p.m. The Pelton wheel develops 95.6475 kW shaft power. The velocity of the buckets = 0.45 times the velocity of the jet, overall efficiency 0.85 and coefficient of the velocity is equal to 0.98. (RGPV MAY 2024)
Q.3) What do you mean by manometric head of any hydro turbine? (RGPV MAY 2022)
Q.4) State the difference between hydraulic mechanical and overall efficiency of hydro turbine. (RGPV MAY 2022)
UNIT 4 – Rotary Fans, Blowers and Compressors
Q.1) With the help of neat sketch discuss the main parts of a centrifugal pump. (RGPV MAY 2024)
Q.2) Define various efficiency of a hydraulic turbine. (RGPV MAY 2024)
Q.3) Describe Surging and Choking in compressor. (RGPV MAY 2024)
Q.4) Compare the axial flow and centrifugal compressor (RGPV MAY 2024)
Q.5) Write a short note on various efficiencies of hydraulic turbines. (RGPV MAY 2023)
Q.6) Explain vector diagram of axial flow compressor. (RGPV MAY 2022)
UNIT 5 – Power Transmitting Turbo Machines
Q.1) What is a torque converter? Explain the working principle of a converter with the help of a neat sketch (RGPV MAY 2024)
Q.2) A hydraulic press has a ram of 200 mm diameter and a plunger of 30 mm diameter. It is used for lifting of 3 k Find the force required at the plunger. (RGPV MAY 2024)
Q.3) Define the specific speed of a turbine. Derive an expression for the specific speed
Q.4) Define and derive specific speed of pump. (RGPV MAY 2023)
Q.5) What is positive displacement machines?
Q.6) Draw a neat sketch of Torque convertor. (RGPV MAY 2023)
Q.7) Write down the application of power transmitting devices at industry level. (RGPV MAY 2022)
Q.8) What is torque convertor where it is used? (RGPV MAY 2022)
Q.9) What are Positive Displacement Pump? (RGPV MAY 2022)
EXTRA QUESTIONS
Q.1) The velocity of steam leaving a nozzle is 925 m/s and the nozzle angle is 208. The blade speed is 250 m/s. The mass flow through the turbine nozzles and blading is 0.182 kg/s and the blade velocity coefficient is 0.7. Calculate the following: (RGPV MAY 2023)
i) Velocity of whirl.
ii) Tangential force on blades.
iii) Axial force on blades.
iv) Work done on blades.
v) Efficiency of blading.
vi) Inlet angle of blades for shockless inflow of steam.
Assume that the inlet and outlet blade angles are equal.
Q.2) In one stage of an impulse turbine the velocity of steam at the exit from the nozzle is 460 m/s, the nozzle angle is 22º and the blade angle is 33°. Find the blade speed so that the steam shall pass on without shock. Also find the stage efficiency and end thrust on the shaft, assuming velocity coefficient = 0.75, and blades are symmetrical. (RGPV MAY 2023)
Q.3) Write short notes on any three of the following: (RGPV MAY 2023)
a) Degree of reaction of turbomachine
b) Governing of steam turbine
c) Vector diagram of Axial flow compressor
d) Slip and efficiency of fluid coupling
— Best of Luck for Exam —
