Anna University, Chennai
ME2305 Applied Hydraulics and Pneumatics
UNIT I
1. i)Discuss the factors to be considered in the selection of hydraulic fluids (8)
ii) Explain the factors which affect the selection of pumps and discuss in detail the
classification and performance features of different types of hydraulic fluids (8)
2. i) With neat sketch explain the hydraulic and pneumatic fluid power system (12)
ii) Discuss the properties of the hydraulic fluids (4)
3 i)How to calculate frictional losses in common valve and fittings (8)
ii)Define Reynolds number? (2)
iii) Differentiate between laminar and turbulent fluid flow (6)
4 i)what are the advantages of oil hydraulic systems over other methods (4)
ii) What are the desirable properties of hydraulic fluids? Discuss any eight of them in
detail (12)
5 i)How is Reynolds number determined? (4)
ii) Draw fluid power symbols of any six different types of valves? (12)
6. i) What is the basic consideration in the design of a hydraulic circuit (8)
ii) Explain the hydraulic press circuit in detail (8)
UNIT II
1. i) What are the factors to be selected in selection of a pump for automobiles lift (8)
ii) How will you measure the pump performance? explain each with suitable
examples ? (8)
2. A pump has a displacement volume of 98.4 cm³ .It delivers 0.00152 m³/s of oil at at
1000rpm and 70 bars. If the prime mover input torque is 124.3 N-m
i)What is the overall efficiency of the pump ? (2)
ii)What is the theoretical torque required to operate the pump ? (6)
(iii)What is cylinder cushioning? Explain with diagram (8)
3. A pump has a displacement volume of 0.0819 *10-3 m3 it delivers 0.0758 m3 /min at
1000rpm at 67 bar if the prime mover input torque is 100 N- m
i)What is the overall efficiency (2)
ii)What is the theoretical torque required to operate the pump (8)
iii)Write short notes on variable displacement pumps (6)
4. (i)Explain the factors which affect the selection of pumps and discuss in detail the
classification and performance features of different types of hydraulic pumps (8)
(ii)Explain the construction and working of gear pump (8)
5. (i)Explain the working principle of external gear pump and determine its performance
measures (10)
(ii)Explain with a diagram the working of a telescopic cylinder (6)
6. (i)A gear pump has a displacement of 60,000 m³ .It delivers 100 liters per minute at
1440rpm and 8 N/mm² .If the prime mover input torque is 75 N-m
Find overall efficiency of the pump
Theoretical torque required to operate the pump (8)
(ii)How the capacity of a variable displacement vane pump is is adjusted? explain with a
diagram (8)
7. With a neat sketch explain the principle construction working advantages ,limitations
and applications of a non-pressure compensated reciprocating vane pump
UNIT-III
2. (i) With neat sketch describe the construction and operation of pressure regulated low
control valve. (10)
(ii) Explain the working of four way two position direction control valve . (6)
3. (i) Briefly explain any two type of accumulators. (8)
(ii) Explain the working of four-way three position control valve (8)
4. (i)A hydraulic pump delivers at 60 bars, 120lpm into a circuit laid on a horizontal plane.
There are 4elbows (k=0.75), one globe valve fully open (k=10), and a direction control valve
(pressure drop=3 bar0 with the inside dia of the pipe is 30mm .The total length of the
straight run pipe is 20m and the specific gravity of the oil is 0.9. The kinematics viscosity of
oil is .0001 m^2/s. Determine the pressure in bar at the exist point of the pipe (10)
(ii)How pressure relief valve and its variants could be used for unloading application (6)
5. (i) Explain the operational features of check valve with neat diagram. (5)
(ii) Write short notes on shuttle valve (5)
(iii) Which kind of accumulator operates at constant pressure? How can the pressure
Changed? (6)
6. (i) Explain air over oil intensifier with suitable example. (10)
(ii) With neat sketch Explain the weight loaded accumulator (6)
7. (i) Explain with a circuit how in shaping operation a fast approach, slow feed, and
rapid return can be achieved. (8)
(ii) Explain with a circuit how punching operation can be achieved (8)
8. (i) How does the pilot operated direction control valve function? Explain with neat
diagram. (8)
(ii) Discuss with neat diagram the working of non-return valve. (8)
9. Design a suitable circuit.
(i) Two hydraulic cylinders two work in sequence. (8)
(ii) An hydraulic cylinder is used for industrial application. It has been decided to use
an accumulator as a leakage compensator. Design a circuit to fulfill these
requirements. (8).
UNIT-IV
1. (i)Discuss the working principle of an air compressor (8)
(ii)Discuss the function of the FRL unit (8)
2. (i)Explain the working of a pneumatic speed control circuit (8)
(ii)What is the time delay circuit? Discuss with an example (8)
3. (i)Describe the operation of an FRL trio unit (8)
(ii)Explain the ANSI symbols for all the types of actuators used in
pneumatics ,Quick exhaust valve and silencer (8)
4. (i)Highlight the advantages of an air over oil circuit and explain with suitable
applications (8)
(ii)Briefly explain on an electro hydraulic servo system used in industries (8)
5. What is compressor? Explain the working principle of piston type compressor with
neat sketch (16)
6. What is the synchronizing? Explain the synchronizing circuit with suitable
approaches? (16)
7. i) Draw the neat sketch of the pneumatic filter and explain its construction and
working. Also give the graphical symbol (6)
ii) Develop a continuous single cylinder reciprocation circuit for pneumatic system
using limit switches and relays (10)
8. (i)Draw a neat sketch of an electro-hydraulic for sequencing drilling and clamping
cylinders (10)
(ii)Explain the working principle of any two types of pneumatic position serving
devices? (6)
9. (i)Describe various pneumatic actuators with neat sketches? (4)
(ii)Develop an electro pneumatic circuit for the following sequence A+B+A-B- where A
& B stand for cylinder (+) indicates extension and (-) indicates retraction of cylinders(12)
10. Design an electro hydraulic circuit for the following sequences A+B+A-B- where A &
B stand for cylinder (+) indicates extension and (-) indicates retraction of cylinders.
Incorporate provision for auto-manual selector and emergency stop (16)
11. i) Explain with neat block diagram an air pilot control circuit for a double acting
cylinder (8)
ii) Describe any one of the electro-hydraulic circuits used in robotic system (8)
UNIT-V
1. i)Design of circuit with air pilot control of a double acting cylinder (8)
ii)Explain with a circuit diagram how is the control of an air motor is achieved. A flow
control valve used to adjust the speed of the motor (8)
2. i)What is the selection criterion for pneumatic components? (4)
ii) What are the factors considered during the installation of pneumatic system? (6)
iii) What are advantages of using fluidics system? (6)
3. Three pneumatic cylinders A, B, C are used in an automatic sequence of operation.
A cylinder extends, B cylinder retracts C cylinder retracts and then A cylinder retracts
C cylinder extends and B cylinder extends Develop pneumatic circuits by cascade
method Sketch also travel step diagram and briefly explain. (16)
4. i)Briefly on the methodology adopted to install and maintain a pneumatic power pack
(10)
ii) Write short notes on low cost automation (6)
5. Explain the hydro mechanical servo system with suitable application (16)
6. How the PLC is used in fluid power control Explain with suitable example (16)
7. i)Explain with block diagram the components present in a PLC and give their
functions (8)
ii) What is cascade control Explain giving suitable example circuit? (8)
8. i)Briefly explain the maintenance requirement for hydraulic power packs (6)
ii) Explain the layout of pneumatic system with emphasis on sizing of conductors,
cleanliness traps and pressure regulation (6)
iii) Explain the principle of low cost automation (4)
9. i)What are PLC Explain their applications in low cost automation (8)
ii) Give the procedure of the cascade method of designing sequencing circuit (8)
10. i)List out various operating problems associated with pumps and valves and the
corresponding possible causes and suitable remedy for each problem (8)
ii) Enunciate various criteria for the selection of pneumatic components (8)
11. i)What are the advantages of PLC? (4)
ii) Explain the working principle of a PLC with neat block diagram (8)
iii) How does a PLC differ from microprocessor? (4)
It's very nice of you to share your knowledge through posts. I love to read stories about your experiences. They're very useful and interesting. I am excited to read the next posts. I'm so grateful for all that you've done. Get more info about trunnion ball valve manufacturer in germany
ReplyDeleteThis comment has been removed by the author.
ReplyDelete