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Posted By: Sriram Member Level: Diamond Posted Date: 14 Jun 2008
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech HYDRAULIC AND PNEUMATIC CONTROL SYSTEMS Set No.4 Question paper
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Code No: RR412205 Set No. 4
IV B.Tech I Semester Regular Examinations, November 2006
HYDRAULIC AND PNEUMATIC CONTROL SYSTEMS
(Instrumentation & Control Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) How does a pilot operated relief valve works? Explain.
(b) What do you understand by series and parallel compensator of flow valve?
Explain. [8+8]
2. (a) What is piston pump? Explain Schematically.
(b) What are the advantages of Non - positive displacement pumps? [8+8]
3. Write short notes on:
(a) Component effectiveness [4]
(b) Viscous damping [4]
(c) Inertia loading [4]
(d) Breakage. [4]
4. State the merits and demerits of various valve elements in a valve control system.
[16]
5. Discuss counter-balancing circuit in Hydraulic and pneumatic systems. [16]
6. What is heat flow in a hydraulic system? And state the factors, which influence
the heat flow in a hydro system. [16]
7. (a) Differentiate open loop and closed loop circuits. [8]
(b) Enlist the advantages of feedback systems. [8]
8. What are pressure test points? Explain how they can be used in Hydraulic system
fault finding. [16]
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