Hydraulics & Pneumatics : Question Paper Jun 2015 - Mechanical Engineering (Semester 7) | Visveswaraya Technological University (VTU)

Hydraulics & Pneumatics - Jun 2015

Mechanical Engg. (Semester 7)

(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1 (a) What are the advantages, limitations and applications of hydraulic systems?(6 marks) 1 (b) With a neat sketch, explain construction and working of unbalanced type gear pump and derive expression for volumetric displacement of the pump.(9 marks) 1 (c) Define the terms volumetric displacement, theoretical flow rate, volumetric efficiency and mechanical efficiency.(5 marks) 2 (a) Distinguish clearly between 1st class, 2nd class and 3rd class leaver system used in hydraulic system.(9 marks) 2 (b) With a neat sketch, explain the working of axial piston motor.(5 marks) 2 (c) A hydraulic motor has 82cm2 (0.082L) volumetric displacements. If it has pressure rating of 70 bar and it receives oil from 0.0006m3/sec (0.60LPS) theoretical flow rate pump. Find the motor i) Speed ii) Theoretical torque iii) Theoretical power.(6 marks) 3 (a) With a neat sketch, explain the three of centre flow chart configuration for Three positions, Four way valves.(9 marks) 3 (b) With a schematic diagram, explain the working of simple pressure relief valve.(5 marks) 3 (c) Explain the working of sequence valve with an example.(6 marks) 4 (a) Explain with suitable circuit how Automatic cylinder reciprocates with two sequence valves.(10 marks) 4 (b) Explain with Hydraulic circuit, how speed control can be achieved in Hydraulic motor.(6 marks) 4 (c) Explain spring loaded type accumulator used in Hydraulic system.(4 marks) 5 (a) Give three important functions of Baffle plate used in reservoir.(7 marks) 5 (b) Define the terms Beta ratio and Beta efficiency of filters.(7 marks) 5 (c) Name five things that can cause a noisy pump.(6 marks) 6 (a) Explain the characteristics of compressed air.(5 marks) 6 (b) Sketch and explain the working of rod-less cylinder.(5 marks) 6 (c) Explain briefly the end position cushioning of pneumatic cylinder.(10 marks) 7 (a) Write a note on direct and indirect actuation of pneumatic cylinder.(10 marks) 7 (b) Explain the logic OR function with shuttle valve and the double acting clinder.(10 marks) 8 (a) Explain the Motion control diagram for a 2-cylinder circuit.(8 marks) 8 (b) Write a note on relays used in electro-pneumatic control.(6 marks) 8 (c) Sketch and explain the non receiving type pressure regulator.(6 marks)


Continue reading

Find answer to specific questions by searching them here. It's the best way to discover useful content.

Find more