Reg. No.
B.E. B.Tech. DEGREE EXAMINATION, MAY 2017 Fifth Semester Mechanical Engineering 14UME506 APPLIED HYDRAULICS AND PNEUMATICS (Regulation 2014) Duration: Three hours Maximum: 100 Marks Answer ALL Questions
PART A (10 x 1 10 Marks)
1. The engineering science pertaining liquid pressure and flow is hydraulics pneumatics both and none of these
2. One litre of water occupies a volume of 100 cm3 250 cm3 500 cm3 1000 cm3
3. Rotary motion in a hydraulic power unit is achieved by using hydraulic cylinder pneumatic cylinder hydraulic and pneumatic cylinder one of the above
4. converts pressure energy of fluid into mechanical work. Pump Actuator Compressor Motor
5. The most common accumulator circuit is
supplementing pump flow making up for system leaks emergency power supply none of these
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6. Check valve is a type of pressure reducing valve pressure relief valve directional control valve pressure sequencing valve
7. The lubricator in a pneumatic circuit is the first element in line second element in line last element in line middle element in the line 8. Which of the following is used to sense the initial and final positions of a piston rod? lever operated direction control valve roller lever valve limit switch all the above
9. The inability of any pump to draw full charge of oil is known as cavitation efficiency deficiency none of these
10. Hydraulic and pneumatic circuits perform the same way for all functions perform differently for all functions perform the same with some exceptions none of the above
PART B x 2 10 Marks)
11. Define the term fluid power.
12. Define Pascal's law.
13. List applications of fluid power in the automotive industry.
14. What is the use of bleed-off circuit?
15. What is servo mean in servo valve system?
PART C x 16 80 Marks)
16. Compare different power systems used in industry based on their properties. Discuss any four applications of hydraulic systems. Or Explain various types of fluid power systems.
17. Explain any three types of special cylinders used in hydraulic circuit with neat sketch.
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Or Represent the working principle of external gear pump and determine its performance measures.
18. Explain the working of four way two position direction control valve. With neat sketch describe the construction and operation of pressure regulated valve. Or Illustrate the working of bladder type accumulator and its application.
19. Discuss the construction and working principle of a rotary vane and lobe compressors. Or What is the synchronizing? Explain the synchronizing circuit with suitable approaches.
20. Explain the hydro mechanical servo system with suitable application. Or Explain the structure and features of a PLC with neat block diagram also write the advantages of PLC.
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