Questions asked in sponsorship interview - Merchant navy entrance exams


For getting sponsored, a candidate will be required to have a minimum knowledge on Mechanical Engineering. Here is a general layout of the topics on which the interview questions might be asked for Merchant navy entrance exams . Candidate must have sufficient knowledge in the following subjects and are required to revise prior joining the course. These topics have already been taught during the graduation and will help the candidates to understand the concepts better during the 1 year Pre-sea training.

  1. MECHANICS/ FLUID MECHANICS/ HYDROSTATICS
  1. Work , power ,energy, concept of force, vectors and concept of friction/lubrication.
  2. Dimensional analysis
  3. Theory of viscosity, flow, nozzles, venturi 
  4. Bernoullis and Archimedes Principles
  5. Operating theory and principle of different types of pumps

  1. STRENGTH OF MATERIALS
  1. UTS, Youngs modulus, Poisson's ratio , stress/strain
  2. Shear force and bending moment.
  3. Material testing / NDT

  1. MATERIAL SCIENCE/ METALLURGY
  1. Iron and manufacturing process
  2. Property of iron and its alloys
  3. Theory of failure ( fatigue, creep, stress hotspots etc)
  4. Different types of failures
  5. Heat treatment process
  6. Corrosion


  1. THERMODYNAMICS
  1. Basic gas laws,
  2. Basic cycles, efficiency , different process ( adiabatic, isothermal etc)
  3. Heat transfer theory
  4. AC and Ref theory
  5. Air compressor theory
  6. Enthalpy diagrams, entropy charts, mollier charts etc

  1. BASICS OF INTERNAL COMBUSTION ENGINES.
  1. Basic engine cycle CP, CV and Dual , Diesel engines.
  2. Basic knowledge of 2 stroke and 4 stroke engine
  3. Efficiency calculations ( experiments and theory)

  1. ELECTRICAL MACHINES AND BASIC ELECTRONICS/INSTRUMENTATION
  1. Basic theory of electricity , its laws and network theorems, electromagnetic theory and faradays laws of electrolysis
  2. AC and DC circuits
  3. How AC and DC is generated
  4. Basic knowledge of semiconductors
  5. Transducers, measuring devices and control circuit terminology.

      7. WORKSHOP TECHNOLOGY
Here is a detailed syllabus of the topics to be covered before the 1 year pre-sea training :


Material Science and Metallurgy


Describe the process of production of pig iron from iron ore
Describe the principle of production of steel from pig iron by the following process:- open hearth, Bessemer converter and  modern process.
Explain the following properties of materials used in engineering:- Elasticity, brittleness, hardness, strength, toughness, ductility, malleability, plasticity and workability.

How is steel categorised on basis of carbon percentage.
What do you understand by the terms : cold working, hot working , strain hardening, forging,  and stress concentration

Define the term isotropic. Explain why rolled steel is non isotropic

What is heat treatment? Briefly describe the following heat  process:- tempering, annealing, normalizing and hardening. What are its uses.
State the composition of the following materials:-  Cast Iron, Cast Steel ,Mild Steel, Stainless Steel and high tensile steel. Briefly compare their properties characteristic  and list their use.

Specify the machinery where the above material are used onboard ship with reasons
Identify the equipments where following alloys used : Brass, Grey Cast Iron, Gun metal, Monel metal, Cupro nickel, Cast Steel.

Define the terms corrosion and erosion. Give examples
Explain the principle of a Galvanic cell.

List the metals in their electro chemical potential. Identify the noble metal and the sacrificial metals in the list.
List the different types of corrosion and explain their causes.


Basics of  Heat engine cycles / Diesel engine cycle


State the laws of thermodynamics.
What do you understand by a Heat Engine and Heat Pump. Basics of refrigeration cycle.
Define thermal efficiency and mechanical efficiency. Identify on what factors will the efficiency of power output of an engine depends.
 
Draw the pressure vs volume curves for the Otto, Diesel and Dual cycle and compare the process. Compare the advantages and disadvantages of these cycles. How is the actual cycle process measured in an operating engine.

Define ENGINE. Define INTERNAL COMBUSTION ENGINE.What is the meaning of SI and CI engine? Diesel engine is what type?
Explain a 2 stroke and a 4 stroke cycle. Compare the cycle for a 2 stroke and a 4 stroke diesel engine. Draw p-v curves and identify important phases of the stroke in it.
Prove mathematically :- the area under a P-V curve is the work done. Derive the equation for power output  P= Pm x L x A x n



  Electricity

Basic laws of electricity (Faradays, Ohms, Lenz laws)
Explain how alternating current is produced in a single loop rotating in magnetic field.

Explain how DC is produced and Identify the parts and explain the functions of those parts of a DC generator.

The basics of AC and DC current/voltage characteristics. Knowledge of phase vectors, phase difference and RMS voltage
State the uses of the Armature field poles, slip rings, field coils, brushes and springs, commutators
Explain the principle of DC motors, back emf, voltage equation. Types of DC motor and their application. Various methods of speed control, Ward Leonard speed control, power losses in D C motor Starters for the dc motor. Circuit explanation
Basic knowledge of principle of operation of transformers, circuits  and its uses
Explain what are the factors controlling the EMF. Equation for finding emf & armature reaction
Alternating current through R L C. Draw graphs showing variation of current & applied voltage when ac is applied to these  components. Solve problems concerning voltage current impedence, reactance, power and pf of R L C
Superimpose the voltage and current graphs to obtain the power graph
Explain impedence and compare it with resistance of a DC circuit. State relation between impedence, voltage, current and power factor
Voltage and Torque equations of motor and explain factors controlling the speed and current
Theory of operation of Induction motors.


 Apart from these, the candidate should also have basic knowledge of Current events, World geography, World shipping routes, Major ports of India, General knowledge.

The above mentioned syllabus is very vast and covers almost all departments of the interview questions that are likely to be asked during the interview. Learn this syllabus before your interview and you will get through easily
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