(a) Explain the basic theory of air compressors using a basic P-V cycle diagram, for a single stage air compressor, showing (6)

(i) Adiabatic

(ii) Polytropic

(iii) Isothermal lines of compression

(b) Explain the advantages of multistage compression and intercooling. Superimpose the effects of both on the P-V diagram mentioned above. (6)

(c) Briefly explain bumping clearance. (4)