Fluid Machinery 2018 Question Paper — Government College of Engineeri…

The 2018 Fluid Machinery previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.

Instructions

Q1. What is model analysis and principle of similitude. And also explain geometric, kinematic and dynamic similarity. [20 marks]
Q2. A jet of water of diameter 7.5 cm strikes a curved plate at its centre with a velocity of 20 m/sec. The curved plate is moving with a velocity of 8 m/sec in the direction of the jet. The jet is deflected through an angle of 165°. Assuming the plate to be smooth, find : (i) Force exerted on the plate in the direction of jet, (ii) Power of the jet, (iii) Efficiency of the jet. [20 marks]

Q3. A Kaplan turbine develops 24647.6 kW power at an average head of 39 metres. Assuming a speed ratio of 2, flow ratio of 0.6, diameter of the boss equal to 0.35 times the diameter of the runner and an overall efficiency of 90%. Calculate the diameter, speed and specific speed of the turbine. [20 marks]
Q4. Distinguish between Impulse Water Turbine and Reaction Water Turbine. [20 marks]

Q5. What is cavitation ? What are the causes of Cavitation and how it is prevented ? [20 marks]
Q6. A centrifugal pump having outer diameter equal to two times the inner diameter and running at 1000 rpm, works against a total head of 40 m. The velocity of flow through the impeller is constant and equal to 2.5 m/s. The vanes are set back at an angle of 40° at outlet. If the outer diameter of the Impeller is 500 mm and width at outlet is 50 mm. Find : (i) Vane angle at inlet (ii) Work done by impeller on water per second, and (iii) Mano-metric efficiency. [20 marks]

Q7. Explain the following terms : (i) Air vessels (ii) Gear pumps (iii) Piston pumps (iv) Surge tanks [20 marks]
Q8. Draw indicator diagram considering the effect of acceleration and friction in suction and delivery pipes. [20 marks]