State the basic advantages of hydraulic system over mechanical system.
[3 marks]Draw the symbols of pressure reducing valve & pressure relief valve used in hydraulic system.
[4 marks]Explain working and construction of an internal gear pump with neat sketch.
[7 marks]State the Pascal’s law. Explain the principle of Bramah’s press.
[3 marks]What are the functions of hydraulic fluids? List different types of hydraulic fluids.
[4 marks]Classify hydraulic accumulators. Explain any one with schematic diagram.
[7 marks]Adouble acting hydraulic 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.
[7 marks]Explain broad applications of pneumatic system.
[3 marks]Explain why and where Filters are provided to a hydraulic system.
[4 marks]State and explain four main center conditions of 4/3 spool type direction control valve. Draw hydraulic symbols of each position for 4/3 solenoid operated spring centered direction control valve.
[7 marks]Give difference between throttle valve and flow control valve.
[3 marks]State different types of pressure control valves. Explain working of each one with the help of neat sketch.
[4 marks]Apneumatic system is used for punching machining. Design a pneumatic circuit to control a double acting cylinder using 5/2 air-air valve and time delay valve. The piston should extend when two push buttons are pressed simultaneously and automatically retract after fully extended and after specified time delay.
[7 marks]Explain different types of fire resistance hydraulic fluid.
[3 marks]Explain construction and working of Quick Exhaust Valve.
[4 marks]What is FRL unit? Explain any one component of FRL unit with schematic diagram.
[7 marks]Explain the following properties of hydraulic fluid.
[3 marks]Bulk Modulus (ii) Viscosity (iii) Fire Resistance
[ marks]Sketch & explain shuttle valve construction & its working.
[4 marks]Sketch the typical fluid reservoir and name the parts, giving their function.1
[7 marks]Write applications of hydrostatic transmission.
[3 marks]With neat sketch explain construction and working of push button operated spring return 3/2 DCV.
[4 marks]What is pressure compensated flow control valve? How does pressure compensation take place?
[7 marks]What is a check valve? Show various uses of a check valve in the hydraulic circuit.
[3 marks]What do you mean Automation? Give classification of Automation.
[4 marks]Explain the working principle of hydraulic motor. State the types of hydraulic motors. Also discuss the selection criteria for hydraulic motors.
[7 marks]