IMPORTANT QUESTIONS IN ME2305 APPLIED HYDRAULICS AND PNEUMATICS FOR NOV/DEC 2012 ANNA UNIVERSITY EXAMINATION

Anna University, Chennai Nov/Dec 2012 Examinations

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ME2305 APPLIED HYDRAULICS AND PNEUMATICS

V Sem MECH

Unit I-V

1.      Explain the hydraulic and pneumatic fluid power system 

2.      Differentiate between laminar and turbulent flow.

3.      How to calculate the frictional losses in the valves and fittings.

4.      Differentiate between laminar and turbulent flow. 

5.      Explain the various mechanisms of hydraulic mounting.

6.      Explain the working principle of external gear pump

7.      A pump has a displacement of 80 cm3. It delivers t.25 Lps at 1200 rpm and 75 bar. If the prime mover input torque is 110 N-m,

(1) Find the overall efficiency of the pump.

(2) What is the theoretical torque required to operate the pump?

8.      Draw and Explain the working of a direct acting pressure reducing valve with neat diagram

9.      With a neat sketch, explain the construction and operation of a pilot operated sequence valve.

10.      What is fail-safe circuit? With suitable diagram, explain two handed safety circuit.

11      Explain the operational feature of check valve.

12.      Explain the piston type compressor. 

13.      Discuss the construction and working principle of a Rotary vane air compression

14.      Explain the synchronizing circuit.     

15.      Develop and electro pneumatic circuit by cascade method for the following sequence : A+ B+ B- A-, Where A and B stands for cylinders, (+) indicates extension and (-) indicates retraction of cvlinders.

16.      Explain the hydro mechanical system

17      Explain the PLC with application.

18      Enlist the various faults, probable causes and also the remedial actions for the following pneurnatic system components.

 (i) Compressor

(iii) Air cylinder

(ii) FRL unit

(iv) Pipelines.