Download JNTUA M.Tech 1st Sem 2019 Feb Regular and Supply 17D04105 Design of Hydraulic And Pneumatic Systems Question Paper

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Code: 17D04105

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M.Tech I Semester Regular & Supplementary Examinations January/February 2019

DESIGN OF HYDRAULIC & PNEUMATIC SYSTEMS

(Common to MD & CAD/CAM)

(For students admitted in 2017 & 2018 only)

Time: 3 hours

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Max. Marks: 60

Answer all the questions

1. 1. What is a semi-rotary actuator? Explain any one with neat sketch.
   2. Explain open loop and closed loop circuit.

   OR

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2. Explain detail about selection, specification and characteristics of hydraulic pump.

3. 1. With a sketch, explain the working of a 4/3 closed centre DCV.
   2. Sketch a fixed flow pressure compensated flow control valve and explain its working.

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   OR

4. Explain the function and working principle of pressure reducing valve and sequence valves.

5. Draw a neat sketch and explain the function of following:

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   1. Synchronizing with flow control valves.
   2. Synchronizing with matching pumps.

   OR

6. Construct a hydraulic circuit for earth mover and explain its working principle.

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7. Develop a circuit for the sequence A1B1B0A0 using step counter method for single cycle operation and explain the working.

8. Consider an automatic drilling machine.

   OR

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9. The complete cycle is as follows: Cylinder A extends to clamp the work piece, then cylinder B extends to drill a hole and then retracts. Cylinder A then retracts to unclamp the work piece. Design a control circuit applying the K-V mapping method. The circuit is provided with a start valve to avoid continuous cycling.

10. 1. State the common faults in a hydraulic system.
    2. Write a note on application of hydraulic/pneumatic systems for robotic control.

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    OR

11. 1. With a block diagram, explain the functions of PLC.
    2. Sketch a PLC based circuit for the extension and retraction of a cylinder and explain.

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