Monday, 5 July 2021

Motor Mep question with answer

 Reefer system switchover complete process from one system to standby system?

Ans. 

Switch to manual.

Collect all ref. in condenser/receiver by closing it's outlet.

*Open the sea water inlet/outlet of cooling line of standby condenser 

Open the outlet of Condenser/Receiver of standby and run it by stopping the running system

*Shut the sea water outlet/inlet of the switched of condenser.



What is cpr? 

Control pressure relief ring top most ring in 2 stroke which have small holes to release exhaust gases so that Compression ring make proper sealing with help of gas forces





Four factors determine the lubricating oil feed rate:


- sulphur content in the fuel oil

- alkali content in the cylinder lube oil

- engine history

- engine load.


Alpha Lubricator or ME Lube operating in ACC-mode


(Adaptive Cylinder oil Control) adapts the lubricating oil feed

rate to the fuel oil sulphur content and the engine load.


ACC factor will depend upon residual BN , high or low top landand iron wear rate


acc factor multiplied by sulphur % = feed rate



How steam pressure is maintained in sea?

By dump the steam , we have controller 


By increasing or decreasing the load ...by maintaining air fuel ratio 


By opening steam to the tanks so that excess steam can be used











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