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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.1 Question paper
Code No: RR412205 Set No. 1
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. Discuss the physical properties of seals, which affect the hydraulic systems. [16]
2. (a) what are the disadvantages of High - water content fluids (HWCF)?
(b) What are common fire resistant fluids used in Hydraulic system? [8+8]
3. Write short notes on:
(a) Component effectiveness [4]
(b) Viscous damping [4]
(c) Inertia loading [4]
(d) Breakage. [4]
4. Differentiate with sketches, the function and characteristics of closed center and
open center direction control valves. [16]
5. Draw a pneumatic sequencing circuit and explain the operations. [16]
6. How do you classify Gas loaded accumulators and explain separator type accumu-
lators. [16]
7. Explain the following.
(a) Variable pump and variable motor [8]
(b) Adjustable pump and fixed displacement motor. [8]
8. What is PLC and describe its elements (or) units with block diagram. [16]
? ? ? ? ?
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