Marine Engineering Interview Questions And Answers

cubic/centimeter

As centrifugal pump is not a self priming pump,separate
priming arrangement is required...
generally,a separate axial pump is provided for this
purpose.The discharge v/v of the centrifugal pump is
closed,and the inlet v/v is opened.The discharge v/v is
opened only after the pump is primed,that is filled with the
liquid to be pumped.

Gate valve is non regulator means full close or full open
positions only, while globe valve is regulator.

O-ring : to prevent leakage between metal parts while
allowing some movement between them

wear ring : generally a softer material than the parent
material , employed to wear out quickly than the parent
metal thereby avoiding loss of parent metal

Design and system wise absolutely no difference. Only the
license manfacturer is different. mitsui and Hitachi
kawasaki Diawoo are the different license holders for Man
B&W for making the engines

by the arrangement of the valves ...in two stroke exhaust
valve is situated at the top(i.e cylinder head) and there
are scavenge ports at the bottom in modern diesel
engine...whereas in four stoke the exhaust and inlet is
situated at the cylinder head.

The 440v generated by the generator can be taken to the MSB
via busbars. associated with preferential trips, overload
protections

bearing number ia 6205z:

6 stands for the type of bearing , ie, deep groove ball
bearing

2 standa for the the OD and width (thickness) of the bearing

05 stands for the ID of the bearing ie, 05 x 4= 20 mm bore;

There r Slip ring arrangement in cranes onboard ships. the
slip rings are present within the crane which is not seen
from outside. the power lines pass throough the centre of
the crane through slip rings. The power line u see out side
is only for grab which comes through the torsion clutch. If
there is no slip ring arrangement the crane cannot turn 360
degrees.

Narve sweedan

7L 67GFCA Means that the engine have seven in-line units
(cylinders)with 67centimeter of Liner diameter,water cooled
and super charged cross head engine.

When material exposed to high temperature atmospehic
situation like high level of oxygen presence, sulfer
presence and different type chemical presence cause
matrial worsening . This type of material corrosion is
known as High temperature corrosion

generally it·s refer to the fuel consumtion rate, there
are several deferent way to catlculate the specific fuel
consuption, such as volumetric method and flow method. but
these methods can be taken only in lab. no possible do it
on the sea.

Ships are divided into various types depending on their
nature of service.

1. Cargo Ships (Bulk carriers, general cargo carriers,
container vessels, oil tankers, chemical tankers, Product
tankers, gas carriers, Ro-Ro ships). Depending on their
sizes they are again classified as handymax, panamax,
suezmax, afromax, vlcc, ulcc, vloc, vlgc, etc.

2. Passenger Ships

3. Serivce ships, such as cable laying submarines, off shore
supply vessels, dp vessels etc

4. Protection such as war ships, Navy submarines etc.

In transformer case Core occurs iron loss (Eddy Current & Hysteresis Loss) Or No Load Loss in Electric Transformer.

there are 12 major ports and 181 minor port in india

anti corrosion agents

Bcoz in case pressure rises above the desired level CO2 has to be realesed in CO2 room .The cause for rise in CO2 pressure may be FIRE in CO 2 room

GAS TURBINE IS AN ECONOMIZER WHICH CALLED A GAS BOILER THAT THE MAIN PURPOSE IS TO HEATED THE STEAM FROM THE EXHAUST GAS MANIFOLD THEN SUPPLY TO THE BOILER.