ANNA UNIVERSITY QUESTION PAPER NOVEMBER / DECEMBER 2018

1. I Que~tion Paper Code : 2S853 I
B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2018.
Fifth Semester
Mechanical Engineering
ME 2305- APPLIED HYDRAULICS AND PNEUMATICS
(Common to Automobile Engineeri.D.g I Mechatronics Engineering and Mechanical
· and Automation Engineering)
(Regulations 2008)
Time : Three hours Maximum: 100 marks
~swer ALL questions.
PART A-.- (10 x 2 = 20 marks)
1. Why is hydraulic·power especially used for heavy work?
2. Name anyfour draw bac!rs of fluid power systems.
3. · Differentiate double rod and tandem cylinder.
4. Why do screw pumps generate. less noise while running?
5·. Explain briefly the non-separator type gas loaded accumulator.
6. What is ladder diagram?
7. What is the advantages of using sequencing circuit?·
8. Where speed control circuits are required?
9. . What is meant by servo systems?·
10. List the uses of ladder diagrams.
PART B ~ (5 x 16 =80 marks)
. .
11. (a) (i) .Explain the various types of fluid power sysj;em.
(ii) Write the advantages offluid power systems.
Or
(b) · Write note! on
(i)
(ii)
Neutralization number.
' '
Frictional losses in laminar and turbulent flow.
(8)
(8)
(8)
(8)
' .
BIBIN.C / ASSOCIATE PROFESSOR / MECHANICAL ENGINEERING / RMK COLLEGE OF ENGINEERING AND TECHNOLOGY 1

2. 12. . (a) (i) Describe the working principle of pressure compensated variable
displacement vane pump. (10)
. (ii) Mention the role of apump in a hydraulic system .and how its
(b) (i)
(ii)
~~ . ~
Or
Explain the 'end cushion' providedin hydraulic cylinder with a neat
sketch. ." ·(8)
How torque is developed in a g~ar motor explain with neat sketch.
. . ' '(8)
13. (a) Sketch and explain commonly used 3-position 4-way direction control
valves. Also .state the applications for closed center, open center and
tandem center valves.
Or
(b) With . the help of circuit diagrams. Explain the application of
accurimlator. Also illustrate its types.
· 14. (a) Draw an pneumatic circuit by cascade method for following sequence of
operatio:Q.: A+ B+ B "'"A- where A and B are the two cylinders and +
indicates extension and- indicates retraction of the cylinder. (16)
Or
(b) .. Briefly explain FRL unit with neat sketch. (16)
.15. (a) (i) Explain the workin-g of electro hydraulic servo systems with neat
sketch. (iO)
(ii) What Is meant by fluidics? Name some fluidic devices and is uses.(6}
Or
(b) (i) Two double-acting pneumatic cylit;tders A and B, with double
solenoid valves have to work in the following sequences,
A+ B+, A-, B-. Draw a ladder diagram and indicate the-input and.
output deviees. Both the cylinders have limit switches. . (10)
(ii) Write short no~s on f~ure and trouble shooting in pneumatic
circuits. (6)
2 23853·
BIBIN.C / ASSOCIATE PROFESSOR / MECHANICAL ENGINEERING / RMK COLLEGE OF ENGINEERING AND TECHNOLOGY 2