TRAINEE MARINE ENGINEER INTERVIEW QUESTIONS & ANSWERS

1.What is motor bike c.c.?
cubic/centimeter
2 :: How the priming is done in a centrifugal pumps?
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.
3 :: What is the different between gate valve and globe valve?
Gate valve is non regulator means full close or full open positions only, while globe valve is regulator.
4 :: What is the purpose of o-ring, wearings in the centrifugal pumps?
Oring
: 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.
5 :: what is the difference between Mitsui MAN b&w and Hitachi MAN b&w engines?
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.
6 :: How will we know, without opening anything, that an engine is 2S or 4S?
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.
7 :: How the power has taken from a large marine generator to the msb?
The 440v generated by the generator can be taken to the MSB via busbars. associated with preferential trips, overload protections.
8 :: What is the meaning of code number which is given on bearing?
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;
9 :: In ship cranes, there is a provision of providing a conveyor for the cable. There is no provision of slip ring. How is it possible?
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.
10 :: Which country level having below the means sea level?
Narve sweedan
11.what does 7L67GFCA stands forin a marine engine MITSUI B&W 7L67GFCA?
7L67GFCA means that the engine have seven in-line units (cylinder)
with 67 centimeter of iner diameter, water cooled and supercharged cross
head engine.
12.what is high temperature corrosion and what is center priming?
When material exposed to high temperature atmospehic situation like high level of
Of oxygen presence, sulfer presence and different type chemical presence cause
Material worsening. this type of material corrosion is known as high temperature
Corrosion.
13. what is specific fuel consumption and how fuel calculate?
Generally its 1/25 refer to the fuel consumption rate,there are several deferent way
To calculate the specific fuel consumption ,such as volumetric method and flow
Methods can be taken only n lab. No possible do it on the sea.
14. How many types of ships?
Ship are dvided into various types depending on their nature of service.
1.cago ships(bulk carriers,general cargo carriers, container vessels, oil tankers,
Chemical tankers, product tankers,gas carriers, Ro-Ro ships).depending on
Their sizes thy are again classified as handymax,panamax, suezmax,,afromax
Vlcc,ulcc,vloc,vlgc,etc.
2. passenger ships
3.service ships, such as cable laying submarines, off shore supply vessels,
dp vessels etc.
4. protection such as war ships , navy submarines etc.
15. The place where happen iron losses?
In transformer case core occurs iron loss (Eddy current & Hysteresis loss)
Or no oad loss in electric transformer.
16.How many ports are there in india?
There are 12 major ports and 181 minor ports in india.
17) In higher altitude the pressure gets less, so how do we cook food there.
Ans) we use a device known as pressure cooker and due to presence of higher pressure inside it, we are able to cook food at higher altitude.
18) What do you understand by the pumps and what purpose they serve? Name different types pumps that are used on board ship. Explain the working of each pump in brief.
Ans )There are mainly four types of pumps that are used in the shipping industry. Centrifugal Pump, reciprocating pump, screw pump and gear pump. Centrifugal pumps are mainly used in the lubrication pumps, like main engine pump. On the other hand centrifugal pumps are always used in the areas where there is a demand of high flow like ballast pumps etc. Reciprocating pumps are used as stripping pumps, and come handy when tanks cleaning process are going one because they can develop more power.
19.What do you know or understand by the term refrigeration. Define the same. Also explain the basic arrangement involved in this process and basic cycle of refrigeration involved. The process of keeping an item below room temperature by storing the item in a system or substance designed to cool or freeze. The most common form of refrigeration is provided by systems (i.e.refrigerators) that use a refrigerant chemical to remove heat from items stored inside the system.
20) What do you understand by fire triangle and how we tackle the each element of fire triangle
Ans) Fire is mainly caused with combined effect of fuel, air and Combustible material.
21) As we know that steam being used on ship (Both Oil tankers and non tankers). So give the places where it is used in the most amounts.
Ans) For fuel oil heating etc (Mainly heavy oil)
22) Why there is so much of importance of English in shipping industry.
English is the international language that is used worldwide and therefore the shipping industry accepted it as the main language on board ships and in communications ship-to-ship and ship-to-coast.
23)Explain the difference between two stroke engines and four stroke engines with the help of cycle?
In two strokes, there is one power stroke for two strokes and crankshaft takes only one revolutions. But in four stroke engine, one power stroke is responsible for causing 4 strokes and the crankshaft turns by two revolution
24) Explain the cycle of working of diesel engine and petrol engines.
The petrol engine cycle is called as Otto Cycle and operates on constant volume and on other diesel cycle operates on Constant pressure. But generally our engine operates on the dual cycles.
25.what is the difference between a cargo ship and container ship?
A "Cargo" ship carries cargo--- either in small boxes or in bulk, like grain or coal, inside the hull of the ship. A CONTAINER ship is specifically built to carry those big metal shipping container boxes, and they are frequently stacked up above the decks of the ship.
26.Do you know about ECDIS Navigation instrument?
An Electronic Chart Display & Information System (ECDIS) is a computer-based navigation information system that complies with International Maritime Organization (IMO) regulations and can be used as an alternative to paper nautical charts.
27.Name four types of fire extinguisher used on board ship and also tell for which type of fire these are used.
Type of Portable Fire Extinguishers Based on the above mentioned classification, portable fire extinguishers are classified and used according to the type of fire. There are five main types of fire extinguishers used on ships: 1. Soda Acid Extinguisher:The soda acid extinguisher is used to fight Class A Fires and can be found in accommodation area of the ship. 2. Water Extinguisher:To counter the A- Class fire, portable water extinguisher of 9Ltr are used. The outer container is filled with water and fitted with a CO2 Cartridge (inner container) which forces the water out of the container with pressure. 3. Foam Extinguisher – Chemical and Mechanical Foam extinguishers are used to extinguish Class B fires and are located near flammable liquids 4. Carbon Dioxide Extinguisher: Carbon dioxide extinguishers are mainly used for class B or class C fires. They are not used for accommodation areas and confined spaces because the gas used in lethal. These extinguishers are mainly5. Dry Powder Extinguisher: Sodium bicarbonate powder is used to extinguish almost all types of fires. It is mainly located in engine room and near electrical equipment.
Types Of Fires
Type 1 - This type of fire occurs in solid materials such as wood and soft furniture. Fires of this type may be extinguished by quenching or cold water.
Type 2 - Cause of this type of fire are fluid sources such as gasoline, lubricating oil and other dangerous inflammable fluids. An attempt to extinguish this type of fire with water lead to devastating results , increasing the intensity of fire. Oil with lesser density will stay on top,erupting into steam so rapidly that it will be thrown in all directions. The only way of extinguishing these fires is by smothering.
Type 3 -This type of fire is caused due to fires in electrical equipments. Fire extinguishers for this type of fire must be non-conductive
Fire extinguishers are mainly classified into five main classes Class A: These types of fire extinguishers are used in fires which are result of burning of wood, glass fibre, upholstery and furnishing Class B: These fire fighters are used for fires which occur from liquids such as lubricating oils and fuels Class C: Fires resulting from involvement of energized electrical equipment such as motors, switches, wiring etc are extinguished by Class C type of fire extinguishers Class D: Fires occurring as a result of combustible materials such as magnesium and aluminium are extinguished by this type of fire extinguishers
Class E: This type of fire extinguisher is used for subsiding fire resulting from any of the above mentioned materials along with high voltage electricity
28. STCW 2010 has came recently; can you tell what extra has come in that?
STCW 2010
The competence of seafarers is the most critical factor in the safe and efficient operation of ships, and has a direct impact on the safety of life at sea
and the protection of the marine environment.
32.Tank cleaning introduction
A tank cleaning guide helps in cleaning the enormous variety of chemical cargoes. Chemical tankers transport an enormous variety of chemical and oil products in global and short sea trade. Due to this variety the next cargo is almost never identical with the previous cargo. Thus tank cleaning is essential on chemical and product tankers. The products that need to be cleaned vary widely in their properties and characteristics. In addition the chemical industry and their customers have continuously increasing quality requirements. This results in high standards regarding the cleanliness of tanks. MIRACLE provides comprehensive Information and guidance about Tank Cleaning. This will help to fulfill these requirements. Information Database A solid understanding of the meaning of important product properties and characteristics as well as knowledge of cleaning hardware is required to review existing or to develop new cleaning methods. The MIRACLE information section contains both, a summary and detailed background information about tank cleaning, related safety issues, testing and inspection guidance up to a troubleshooting section. The information section can also be used for training and as a reference handbook. Tank Cleaning Proposals The included tankcleaning proposals provide cleaning guidance for some 7000 chemicals shipped regularly in bulk. The tank cleaning proposals in this manual are updated regularly. The success of a tankcleaning job depends on many factors such as thorough planning of the cleaning job, the design of tanks, cleaning machines and their operation, design of piping, heating capabilities etc which are known only to ship’s command. MIRACLE provides alternative methods for difficult products so that the best fit can be selected. Combination of Background Knowledge and MIRACLE Cleaning Proposals Through combination of tankcleaning guidelines indicating the general approach with the information about the theoretical background, MIRACLE will enable the ship’s command to succeed. Safety It is generally recognized that tank cleaning is the most hazardous period of tanker operation. Therefore all the special hazards that exist and how they can be avoided during tank cleaning are explained in detail in the MIRACLE Safety section.
33.What is the unit of specific fuel consumption and define the same? Thrust specific fuel consumption (TSFC) or sometimes simplyspecific fuel consumption, SFC, is an engineering term that is used to describe the fuel efficiency of an engine design with respect to thrust output. TSFC may also be thought of as fuel consumption(grams/second) per unit of thrust (kilonewtons, or kN).
35.What is the unit of work done and define the same? JOULE Work and energy are measured in the same unit, the joule (J). When an object is moved by a force, energy is transferred and work is done. But work is not a form of energy - it is one of the ways in which energy can be transferred
36. What is the unit of power? WATT The dimension of power is energy divided by time. The SI unit of power is the watt (W), which is equal to one joule per second. Other units of power include ergs per second (erg/s), horsepower (hp), metrichorsepower (Pferdestärke (PS) or cheval vapeur (CV)), and foot-pounds per minute.
37.Why steam traps are installed in the steam lines
Ans: Steam traps are installed in the line to remove any condensate presne tin the line, to avoid water hammer problems. There are three types of steam traps:
Mechanical Thermostatic Thermodynamic.
38.Name different type of rudders used on the ship and what is the difference between these.
Ans: Types of rudders are:
Balanced, Unbalanced and Semi Balanced. Difference is the area of rudder before or after the axis of rudder stock.
39.How will you define the pitch of the propeller and how to we calculate the same.
Ans: Pitch of the propeller can be calculated by various methods like protector and spirit level.
40.What is Ph scale and which side is the Alkaline and which side is the acid.
Ans: It indicates the acidic, neutral and alkaline nature of liquid. 1‐6 is acidic, 7 is neutral and 7‐14 is alkaline.
41.Name different type of compressors used on board ship. How can you relate centrifugalpump with the I.C engine.
Ans: Screw Type compressor, centrifugal type and reciprocating type.
42.Why the crank shaft of the engine earthed?
Ans: To prevent spark taking place at the bearing, as the shaft is charged due to
static electricity generated and since propeller is at different potential.
43.What is the Unit of Workdone, Force and what is the relation.
Ans: the basic reason why we do earthing of crankshaft is that since it always rotating, a static charge developed. Now in order to avoid any kind of spark originating in crankcase, we earth the charge developing in the crankshaft.
44.Why the crank shaft of the engine earthed?
Ans: To prevent spark taking place at the bearing, as the shaft is charged due to
static electricity generated and since propeller is at different potential.
465What is the Unit of Workdone, Force and what is the relation.
Ans: the basic reason why we do earthing of crankshaft is that since it always rotating, a static charge developed. Now in order to avoid any kind of spark originating in crankcase, we earth the charge developing in the crankshaft.
46.What is the meaning of SOLAS and what purpose it serves?
Ans: Solas stands for 'safety of life at sea'. This is an amendment from the International maritime organizations to check the safety of life at sea. This comes under the STCW. There are various clauses given in the SOLAS and they are needed to be followed in strict manner.
47.What do you know about incinerator? What is the need of installing a incinerator on ship?
Ans: Incinerator is like combustion machinery, which is used to burn oily rags, galley waster (Non plastic) and waster oil from the oily water separator.
In Incinerator, these products are burned at high temperature and the left over ash is given to the port reception facility.
48.What do you know about the Archimedes principal, define it?
If a solid is immersed in the water, then loss of weight by the body is always equivalent to the water displace by the body. The loss in weight is mainly due to the up thrust given by the water to the body.
49. Define what do you means by the terms ‘Displacement of Ship’?
Ans: this is similar to the law of Archimedes principal.
50. What is metacentric height and how it plays crucial role in the stability of the ship?
Ans: Metacentric height is always considered as the measure of initial stability of the ship. In simple terms, the metacentric height is the distance between the centre of gravity of the ship and its metacentre. Usually a higher mete centric height is considered good.
51. What do you understand by the specific fuel consumption? What is the unit of same?
The unit of specific fuel consumption is Kg/Kwh
52. Define the terms ‘Balanced Rudder’?
Ans :We say that rudder is balanced when centre of the stock coincides with centre of effort. Now by this it is definitely clear that there is no torque acting on the rudder during this time.
53. What do you understand by the terms ‘Gross tonnage and Net tonnage’?
Ans Gross tonnage is defined as the ship enclosed space from keel to the funnel regions and and this enclosed space is measured outside the ship.
Net tonnage is always the space where cargo can be taken or the space with which a ship is doing
Business
.
54. Define what is the meaning of dead weight? Also explain the meaning of light weight?
Ans Dead weight is the weight of the ship, when it is completely constructed and ready to go to thesea. But it does not include any fuels, crew, cargo, ballast etc. So we can say that it is weight of newly built ship, which is ready for the sea.Including all the things that are excluded in the dead weight iscalled as light weight.
55.Expand the terms IMDG code, PSCO, ILO SOLAS and SAFCON
Ans :IMDG:International maritime dangerous code
PSCO:Port state control organization
ILO:InternationalLabour Organization
SOLAS:Safetyof life at sea
SAFON:Safetyconstruction certificate
56. Name the instrument used to measure the inclination of ship?
Ans :Stabilograph is the instrument which is used to measure inclination of the ship. But during this experiment, the ship should be berthed in the calm waters only.
57. Which is the biggest port in India?
Ans. Mumbai
58. How will you classify the tanker ships?
Following are the classification of tankers ships:
a) Handymax- Those tankers having dead weight in between 35000-58000 tones are
called as Handymax.
b) Panamax- Those tankers ships having dimensions according to the Panama Canal are called as Panamax.
c) Aframax- Those tankers ships having dead weight smaller than 120,000 metric tons
and breadth is above 32.31m.
d) Suezmax- Those tankers ships having dimensions according to the Suez Canal
59.Define, Enthalpy and Entropy?
Ans- Enthalpy for a thermodynamic system represents how much is the total energy
present in the system. Sometimes Enthalpy is also considered as a heat content present in the system and present under the constant pressure condition. The S.I unit of enthalpy is Joules.
Entropy: It is defined as the disorder that is present in the thermodynamic system.
Actually entropy is the heat contained in a system that cannot be used do work by the
system.
60. What are the three modes of heat transfer?
Ans- Conduction, Convection and Radiation
61. What is capacitor and Inductor?
Capacitor is passive electrical equipment having two terminals, which is used to store
charge. Capacitors are used in various equipments like electric motors.
62. What is the meaning of Indicated Horse power and Brake horse power, and difference between the two?
Ans- Indicated Horse Power (IHP) is defined as the theoretical value of power available at the shaft.
Brake Horse power (BHP) is defined as the practical value of power available at the shaft
63. What is refrigeration and air conditioning?
Ans- Refrigeration is a process in which the temperature of a space or its contents is
reduced to below that of their surroundings.
Air conditioning is defined as the process of conditioning of air as per human comfort.
64. What is the purpose of ISM code and what ISM covers?
Ans- ISM is made to ensure safety at sea and to prevent human injury or less of life. It also emphasis on avoiding damage to the environment and to the ship.
ISM covers following things
a) Construction part related to the ships and related machineries.
b) Equipment that are related to the shipping industry
c) Stability of the vessel and proper cargo loading.
d) Operating limits
e) The operating parameters.
f) Qualifications and training of vessels crew.
g) Vessel Maintenance emergency procedure
h) Health and safety consideration.
65. Name different types of distress signal?
Ans. Four rocket parachute flares, six red hand flares and two buoyant smoke signal.

66.Do you know what Piracy is‐ What is your opinion about it? Piracy is everwhere, in the richer, more developed countries, it is found and stopped, and hushed, very quickly, but in the growing countries, (as mentioned before, Russia, China, India, ect) It doesn't get caught as often due to their 'newness' with all of the technology. Sometimes the little man is smarter than the government.