some of the questions for oral preparation for your engineer COC examinations.
This article covers the Marine Engineering Practice questions.
the questions that we are covering in this article. Some of the questions have
been taken from social platforms as well.
Engineering Practice Questions
Freshwater Generator Starting
A/E Sump Going Down
leaking in guide shoe
cooler leaking he said no
two possibilities in this.
is a leakage in the LO cooler and as the LO pressure is higher than the SW
pressure LO may be wasted and can be confirmed by the SW outlet from the
overboard valve of the Aux eng coolers. There film of LO can be observed
floating in the sea.
Oil scrapper rings are fitted in the opposite direction while assembling piston
or the oil scrapper rings may be damaged or worn out. So LO burning takes
place. As due to faulty oil scrapper rings instead of scrapping to the
crankcase LO is directed towards combustion space. This can be confirmed by the
whitish smoke coming out at the funnel of that exhaust pipe of particular auxiliary engine.
Boiler starting from
Why only 1/4 th level
initially filled up while firing boiler?
While the boiler is cold the same 1/4 water level will be expand by volume and
it will take more space inside the boiler drum while its heated up for forming
Maintenance – Foundation bolts to be checked, Gear oil to be checked, gear oil
to be renewed as per OEM, Brake linings gripping surfaces to be checked and to
be roughened if required.
moving parts to be lubricated .
gears should be inspected.
Motor insulation to be checked at regular interval.
and relays of the circuit to be checked.
How to insure all unit of A/E sharing equal load
will check Exhaust temperature
will take peak pressure of all unit and compare it with all and approximately
same. Then all are sharing equal load if someone is more than that unit sharing
area of indicator diagram
divided by length of indicator diagram × spring scale= mean effective pressure.