1) Sketch the graphic symbol for:
a) Fixed displacement pump,
b) Variable displacement pump.
2) List any four drawbacks of the fluid power system.
3) Sketch the graphic symbol for pressure relief valve.
4) State the sealing devices used in hydraulic circuit.
5) Describe what do you understand by bleed off circuit?
6) Explain what are limit switches? Also specify how it differs from the push button switch.
7) What design information is needed while selecting a hydraulic cylinder?
8) Explain what is a fail-safe circuit?
9) Write down the de-merits of pneumatic system over hydraulic system.
10) Specify the kinds of valves within the pneumatic system.