- The
spindle valve will be order from marine workshop (PNSC). It will be
construct of M/S. The dimension
will be provide when ordering.
- case
hardening advantages are ; long life of metal, realibility, can withstand
with long fatigue.etc. it is done by several methods ( nitriding,
induction hardening, flame hardening, carbodizing, and nitriding is most commonly used).
Example of component are bearing journal, gudgeon pin, shaft.
- The
importance of maintaining the water level in a boiler to prevent the
boiler from dehydration. This water is consuming up as steam is producing.
So a constant water level is necessary for production of steam at a
constant rate. If the water level is drop significantly. The fracture of
plate and bending of tube may occur. If the water level is to rise
significantly the thermal shock can be happened. steam will not be
saturated or we can say that the output of the steam dryness will be
effect.
- reason
of using pure water in boiler is to prevent the formation of ……slag. To have minimum no. of
chlorides, phosphate, carbonate.
- precaution
are gas free the vicinity, check any dangerous gas with explosimeter,
electric fan is used for free circulation of air. Other wise the person
may fatal, ……………..
- when
taking a watch the main point that will be checked as following.
·
Boiler is running normal.
·
Economizer/exhaust gas boiler is running normal.
·
Aux. Generators are running normal.
·
Main engine is running normal
·
Check the level of diesel oil(service tank),
fuel oil(service tank), lub oil, fresh water (check also which side port or
starboard is on consume)
·
Check that
the log book is maintained in the previous watch.
·
And confirm form previous watch officer that
every thing is running normal.
- smoke
detector work on principle that smoke can scattered the light. Thus as
shown in the figure the photocell is located in another compartment with
opaque restriction between the light and photocell. When smoke come, the
light will scattered and fall on the photocell. Where it is amplified, and
the bell will ring. It can be tested by smoke of a cigarette or butane.
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