Q5. Sketch and describe an independent two-stage air compressor. Draw a set of typical indicator diagrams and insert the various pressures and temperatures. Indicate the effect of a leaking HP suction valve and excessive HP clearance volume (16)
Q4. (a) Describe uses of compressed air onboard the ship. (6)
(b) Describe maintenance schedule of various systems on main air compressor. (6)
(c) Describe Isolation procedure of main air compressor before starting any work (4)
Q7. State the causes and remedial actions to be taken in case of the following occurring on an air compressor:
(a) Water mixed in the crankcase oil (4)
(b) LP safety valve blowing (4)
(c) Bursting disc rupture (4)
(d) Problems caused by detective piston rings (4)
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