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Q8. With reference to slow speed diesel engine turbocharging:

(a) explain why electrically driven scavenge air blowers are sometimes fitted; (4)

(b) describe how a turbocharger may be disabled to allow for operation of the main engine in the event of failure of the turbocharger rotor; (8)

(c) describe the procedure for running an engine in the event of a turbocharger not being operational. (4)