ED7004 Design of Hydraulic & Pneumatic Systems M.E Question Bank : valliammai.co.in

Name of the College : Valliammai Engineering College
University : Anna University
Department : Mechanical Engineering
Subject Code/Name : ED7004-Design of Hydraulic & Pneumatic Systems
Degree : M.E CAD/CAM
Year : II
Semester : III
Document Type : Question Bank
Website : valliammai.co.in

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Valliammai Design of Hydraulic & Pneumatic Systems Paper

Unit-I

Oil Hydraulic System And Hydraulic Actuators :
Part-A( 2 Marks) :
1. What is the function of pump?
2. Distinguish between single acting and double acting actuators?
3. Name the basic components required in hydraulic system.

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4. What is the difference between fixed displacement and variable displacement pump?
5. What is a piston pump?
6. What is a differential cylinder?
7. State the advantages of a positive displacement pumps over non positive displacement pump.
8. What is meant by pump optimization?
9. What is a fluid? What are hydraulic fluids?
10. Define volumetric efficiency, mechanical efficiency and overall efficiency of hydraulic motor ?
11. What is meant by Q-H curve and explain?
12. What is meant by positive displacement pump?
13. Explain difference between linear and rotary actuators?
14. Define actuators also explain main types of actuators?
15. Name few applications of hydraulics?
16. What is a telescopic cylinder? When would it normally be used?
17. What is the main difference between a open loop and closed loop fluid power system?
18. What is a fluid? What are the functions and characteristics of hydraulic fluids?
19. Write short notes on specifications of hydraulic pumps?
20. What are the main aspects of selection of hydraulic pumps?

Unit-II

Control And Regulation Elements :
Part- A(2 Marks) :
1. Draw symbols of the following (a) check valve (b) flow control valves.
2. Name any four pressure control valves used in hydraulics systems.
3. Sketch any two centre configurations of 4/3 DCV.
4. List the drawbacks of simple relief valve.
5. What is the function of an unloading valve?
6. How do a simple pressure relief valve and compound relief valve differ in operation?
7. What is the purpose of the check valve in sequence circuit?
8. How does a pilot operated check valve differ from a simple check valve?
9. What is a safety valve? Name one application.
10. What is the purpose of a flow control valve?
11. What is a solenoid and how does it work?
12. State the specification of a DC valve?
13. Why is a pressure relief valve used in a hydraulic system? State the basic types of pressure relief valve?
14. When is a pressure reducing valve used in a hydraulic system?
15. What is cracking pressure?
16. What is the difference between an open-center and closed-center type of directional control valve?
17. What is a four way direction control valve?
18. What is overlap in valves?
19. What is a pressure compensated flow control valve?
20. What is the need for temperature compensation in flow control valve?

Unit-III

Hydraulic Circuits :
Part-A(2 Marks) :
1. Give the applications of synchronizing circuits.
2. How are the accumulators used in Hydraulics circuits?
3. What is oil hammer?
4. What is a pilot operated check valve?
5. What is a failsafe circuit?
6. Can a hydraulic cylinder be designed so that for the same pump flow, the extending and retracing in speeds will be equal? Explain your answer?
7. What is the function of sequencing valve?
8. What is the function of accumulator?
9. What is the function of intensifier in hydraulic circuit?
10. What is meant by synchronization of cylinder motion? Name the various methods to obtain it.
11. What is banked unit? Mention one of its applications.
12. What is meant by quick return? Given an example.
13. What are the difference between the relief valve and the sequence valve?
14. List three important considerations to be taken into account while designing a hydraulic circuit
15. List various types of accumulators.
16. What is intensifier? State its application.
17. What do you understand by the term power pack?
18. What is meant by forklift? Given an example.
19. What is a bladder type accumulator? What precautions are generally taken when one uses a bladder type accumulator?
20. What type of gas is used in a gas charged accumulator? Why is oxygen not used?