Describe following properties of hydraulic fluid.
[3 marks]Demulsibility (ii) Bulk Modulus (iii) Viscosity
[ marks]Define Control Valve. List the different types of control valves.
[4 marks]Compare hydraulic system with mechanical, electrical and pneumatic system.
[7 marks]Describe briefly about Biodegradable oils.
[3 marks]Draw general layout of pneumatic system & write function of each components.
[4 marks]List different types of accumulators and describe functioning of any two with the help of neat sketch.
[7 marks]With the help of neat sketch explain the main features of hydraulic reservoir.
[7 marks]How does an external gear pump differ from an internal gear pump?
[3 marks]What is the main difference between sequence valve, pressure reducing valve and pressure relief valve? Draw hydraulic symbols of each with proper designations.
[4 marks]Draw the detailed symbol of FRL unit. Explain any two components of the same in detail.
[7 marks]Compare air motor with electric motor.
[3 marks]Differentiate between a seat type and spool type DC valve. Which of these two types of valves are widely used? Why?
[4 marks]What is the significance of center condition in 4/3 DCV? Which center condition is used in which application, explain each in detail.
[7 marks]Explain ‘cushioning’ of pneumatic cylinder.
[3 marks]Give over view of fire resistant fluids.
[4 marks]What is the purpose of filter in hydraulic system? Where it is located in hydraulic circuit? What is the significance of location of filter?
[7 marks]Why two stage electro-hydraulic valve is preferred over single stage valve? State the function of pilot stage in it.
[3 marks]With neat sketch explain working and construction of balanced vane pump.
[4 marks]Asingle acting cylinder is to be operated from two different sources Aand Bsuch that its forward motion can be actuated from either of the two locations. Draw and explain a circuit diagram.1
[7 marks]Give difference between Meter-in and Meter-out circuit.
[3 marks]Design and explain regenerative hydraulic circuit.
[4 marks]Explain construction and working of swash plate axial piston pump with the help of neat schematic diagram.
[7 marks]Give brief overview on hydrostatic transmission system.
[3 marks]Classify automation by control system.
[4 marks]Explain construction and operation of time delay valve. Explain significance of different components present in a Time delay valve.
[7 marks]