JNTU Kakinada B-Tech 4-1 INDUSTRIAL HYDRAULICS AND PNUMATICS R13 March 2018 Question Paper

PART ?A (22 Marks)1. a) Give any two differences between hydraulic power and pneumatic power. [4]
b) What are the main advantages of gear motors? [3]
c) List the drawbacks of simple relief valve. [4]
d) How are the accumulators used in Hydraulics circuits? [3]
e) What it the principle of solenoid? [4]
f) How does a proportional valve differ from conventional solenoid valves? [4]

PART ?B (3×16 = 48 Marks)2. a) With a sketch, explain the working of vane pump. Derive an expression for the
theoretical discharge of the pump.
[8]
b) Mention the different types of fluid power systems and list at least two practical
applications of each of these systems.
[8]
3. a) Explain with suitable circuits, how the single acting and double acting cylinders are
controlled.
[8]
b) Discuss the steps involved in the selection of a pump for a hydraulic circuit. [8]
4. a) Explain the working of a pilot operated pressure relief valve with neat sketch. [8]
b) Illustrate the use of sequence valve with a simple hydraulic circuit. [8]
5. a) Explain any two types of accumulator circuits with sketch. [8]
b) Draw a basic block of a circuit showing the reservoir, accessories, pressure relief
valve, pump and tank lines.
[8]
6. Explain the various types of pneumatic switching elements with simple sketch. [16]
7. a) What could be the reasons for failure in fluid power systems? [8]
b) Discuss the applications of Programmable logic controllers in fluid power control. [8]
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IV B.Tech I Semester Supplementary Examinations, February/March – 2018
INDUSTRIAL HYDRAULICS AND PNUMATICS (Mechanical Engineering)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THEE questions from Part-B
*****
Code No: RT4103A
Set No. 1
R13