Name of the College : Noorul Islam College of Engineering
University : Anna University
Degree : B.E
Department : Mechanical Engineering
Subject Code/Name : ME 1305 – Applied Hydrolics & Pneumatics
Document Type : Question Bank
Website : niceindia.com
Download Model/Sample Question Paper :https://www.pdfquestion.in/uploads/niceindia.com/3020-ME_1305_-_Applied_Hydraulics_and_Pneumatics_.pdf
Applied Hydrolics & Pneumatics Question Paper
Two Marks Questions and Answers :
1. Define Hydraulics :
The engineering science pertaining to liquid pressure and flow.
Related : Noorul Islam College of Engineering ME1201 Engineering Thermodynamics B.E Question Bank : www.pdfquestion.in/3022.html
2. What is a Fluid Power System? :
A system that transmits and controls power through use of a pressurized fluid within an enclosed circuit.
3. Define Pascal’s -Law :
A pressure applied to a confined fluid at rest is transmitted with equal intensity throughout the fluid.
4. What is the function of hydraulic actuator? :
Hydraulic actuators convert the pressure energy of fluid into mechanical output to perform useful work.
5. Define back Pressure :
The pressure encountered on the return side of a fluid system.
6. Define Pump :
A device which causes a liquid to flow against a pressure. It converts mechanical energy into fluid energy. .
7. How pumps are classified? :
1. Positive displacement pumps
2.Hydrodynamic (or) Non-positive displacement pumps.
8. Write about positive displacement pumps? :
Positive displacement pumps have the internal working elements which make a very, close fit together so that there is very little leakage (or) slippage between them. This type of pumps ejects a fixed quantity of liquid into the hydraulic system per revolution of the’ pump shaft.
9. How gear pumps are classified? :
1. External gear pump
2. Internal gear pump
3. Lobe pump
4. Screw pump
5. Gerotor pump
10. Define Axial Piston pump & Radial Piston pump :
A pump having multiple pistons disposed with their axes parallel to shaft axis. A pump having multiple pistons disposed radially to the shaft axis, actuated by an eccentric element.
11. Define Gear pump & Vane pump :
A pump having two or more intermeshing gears or lobed members enclosed in housing. A pump having multiple radial vanes within a supporting rotor.
12. Define Motor :
A device which converts .fluid power into mechanical power. It usually delivers Torque and rotary motion to a shaft.
13. Define Viscosity :
A measure of the internal friction or the resistance to fluid flow. 1
14. Differentiate between liquid pressure and liquid flow rate? :
The liquid pressure is responsible for the force developed at hydraulic actuator while the
liquid flow rate is responsible for the speed of the hydraulic actuator.
15. How velocity of the hydraulic actuator is calculated? :
Velocity of the hydraulic actuator = Input flow rate/Area of piston
16.State the Bernoulli’s principle? :
If the flow rate in the system is constant, then the total energy in the system will also be constant irrespective of the variation in the cross section of the fluid passages.
17. What are the factors to be considered for pump selection? :
1. Discharge
2. Operating speed
3. Pressure rating
4. . Performance
5. Reliability
6. Maintenance
7. C cost
8. Noise
18. How Vane pumps are classified? :
1. Unbalance vane pump
2. Balanced vane pump
3. Variable displacement vane pump
19. How piston pumps are classified? :
1. Radial piston pump
2. Piston pump with stationary cam and rotating block
3. Axial pump with swash plate
4. Bent axis pump
20. How the displacement of the gear pump is determined? : ‘
The displacement of the .gear pump is determined by
1. Volume of fluid between each pair of teeth
2. Number of teeth
3. Speed of rotation
21. Define Accumulator :
A container in which liquid is stored under pressure as a source of fluid power.
22. What are the three basic types of accumulators used in hydraulic systems? :
1. Gravity type (or) weight loaded type
2. Spring loaded type
3. Gas loaded type.
23. Name the two types of gas loaded accumulator? :
1. Non-separator type
2. Separator type
24. Explain non-separator type gas loaded accumulator? :
In this type, the gas is filled at the top and the heavy oil at the bottom of the shell. There is no separator between the gas and oil and thus the pressurized gas pushes the oil directly.
25 . What are the three basic types of separator type gas loaded accumulator? :
1. Piston type
2. Diaphragm type
3.Bladder type