Three day tour on the johar.
I am starting the conversation with my senior from the
central point. The question which I asked from the senior are
About the perfect cylinder
lubrication indication.
- no
glassy mirror surface it must be mid b/w shiny and dull
- spot
on the liner
- not
found on stuffing box and scavengine port(ideal condition)
This piece of information is also about the cylinder
lubrication. The ball which can be seen in the pipe like test tube are actually
work for non-return purpose but also show that part lubrication is running.
the difference b/w the easing gear and safety valve is that
safety is being operted by easy ness from a gear which is located at
unrestricted location.
About the reverse power is that which is happen when the
generator of the ship loose their speed and it on the same busbar will suck
power from the other generator. (High to low). Generator which is a very big
machine consume very heavy power and also it can injure the prime mover(dangerous
speed component can throw away). It is usually done by relay.
The generator is rated in kva (it is the apparent power).
Kvar(reactive power- capacitor and inductor)
Kw means the active (real power). The load which I found on
the generator is 350-400kw
Inert gas is just like smoke
but have low content of oxygen and high nitrogen. Have smell, white
cloud colour. It help us to increase the positive pressure in the tank.
And also when filing the tanks make the tanks in inert
conditions while loading it is discharge in air. And also during loading for
sake of stability ballasting(pumping seawater in wing tank or center tank) is
operated. By pump but in mt johar it is done by fire hose from the above of
hole. And manually filling.
Also from the other senior I asked about the difference
between the windlass and winches. The difference is offcourse the power and
design. Achor is usally lifted up with a windlass and winches for mooring. But
the combination can also used on the board ship.
Difference between the nrt and grt and dwt are the
followings . dwt is total displacement incuding light weight (only ship not
bunker, crew, food items, fuel,). Nrt is volume above the cargo and grt is
volume of machine and above cargo
Chlorides, can be found on the board ship, remedy is of
course many chemical including hydrazine used to reduced the oxygen content.
Steam and carbondioxide Both can be used in case of
scavenging fire. But steam is used which I have read in the book.
Air register is mean to regist (to allow the air
infurnance). Note . for purging normal is allow to come in burner of boiler .
the boiler of johar is in O-shaped. In the middle there is a fire and steam
drum on the above and water drum on below.
Test of lub is conradson carbon residue. Viscosity .
ofcourse depend upon the company. Other will carry out in the laboratory. Base
Is used to neutraliza it .
Cross head lub is done by screw type pump also the bypass is
available. Cross head lubrication is complex as compared to other lubrication.
On the mt johar jerked ignition is employed ( spill valve)
and on the other ship we are using common rail . the pump in the one sequence.
Like u watch the video in one ship.
On one question I asked about the turbine type which is
being using on the shinko manufacturer. But sir don’t know about it.
Regarding the
purifier question must be prepared to asked from the seniors. And I havenot
seen clarifier where it is located in johar or swat.
How to clean lub oil
purifier. For the main engine and for the generator.
