MUMBAI MMD ORAL QUESTIONS PART-9

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559

Date – 07-02-2020

Internal – Mukhopadyay Sir

Function-4b

Q. What is detuning?

Q. What is critical speed?

Q. What is natural frequency & resonance?

Q. Steering gear hunting?

Q. Speed droop?

Q. Significance of cetane & octane no.

Q. Rudder survey?

Function-6

Q. Main engine safeties?

Q. Nip & crush?

Q. How to fit bearing in pump shaft?

Q. How to make 16mm thread & required tools?

Q. Creep?

Date – 07-02-2019

Function-3

Q. Name of engine.full detail about nomenclature

Q. What is marpol

Q. Annex 6

Q. Which all are pollutants

Q. All certificate

Q. Nox file what all written in it

Q. Tier 3

Q. Readings in tier 3 depends on what factors of engine

Q. Which all types of fixed foam fire fighting in your ship

Q. Co2 all maintenance

Q. Floors

Function-5

Q. What is insulation

Q. How its measured

Q. Minimum insulation

Q. When you will take insulation reading

Q. Alternator maintenance

Q. How to measure air gap. why air gap is there

Q. Maintenance on lead acid battery

Q. Half wave rectifier

Q. Full wave rectifier

Q. Avr functions

Q. If insulation alarm comes what all actions

Q. Navigation bulb gone on mast what all you will do

Date – 06-02-2020

External – Vishwanatan sir

Internal – Srinivasan sir

Function-4b

Q. PMax

Q. Pcom cross question

Q. Starting sequence. Of engine

Q. How engine started, Many cross questions

Q. Firing order, cross questions

Function-5

Q. Soft starter

Q. Auto transformer

Q. PLC

Q. 100m length cable how will you check the insulation

Function-6

Q. Bilge pump rectification

Q. Piston ring Lamela ring difference,

Q. What you will check.

Q. Purifier gravityy disc, with new bunkers,. If no gravity disc what you will do.

Q. How will you take sample of crankcase oil.

Internal questions:-

Q. How will you check burn out on piston crown.

Q. How will you tighten holding down bolts. Tightening sequence.

Q. How will you check holding down bolts

Date – 10-02-2020

Internal – Srinivasan

Function-4b, 6

Q. Draw cross section of roller link

Q. How thin shell in thin shell bearing prevented from rotating inside the bearing

Q. What is lead and lag in a boiler

Q. Checks to be carried out after sailing in bad weather.

Q. Action in case of non flow of one unit cylinder lube oil

Q. Use of aftercooler in comp

Q. What is thermal and mechanical balancing of main engine

Q. Alignment check methods.

Q. AE running in method and how to find out if piston rings have run in or not?

Function-5

Q. How to test a diode

Q. MGPS working.. current and volt values

Q. Ex d and exi explain

Q. AVR explain

Q. Checks before taking shore supply

Date – Unknown

Internal – Kar sir

Function-3

Q. What is permeability, calculation parameters, engine Room parameter

Q. Rudder types, construction, forces

Q. Propeller characteristics

Q. Kyoto convention

Q. MEPC 155,

Q. OWS regulations, time for changeover in case alarm and more

Q. Nox

Q. Fuel mixed with Lube oil effects

Function-4b

Q. Main engine fuel pump construction, tests

Q. Fuel oil properties, most imp prop of fuel as related to combustion,

Q. Main engine liner construction and cross questions

Q. Main engine crankshaft types, semi built up construction, dimensions

Q. Oros type piston construction and diagram etc

Q. Main engine piston mean speed relation  between MAN Engine types K, L & S

Q. Light spring diagram explanations

Function-5

Q. Types of motor speed control

Q. Zener diode use explanation in AVR

Q. Electric cable  insulation classes and material etc

Q. Deck Crane safeties

Q. Preferential trip, time between trips

Q. Transister and rectifiers

Q. Thermister working and uses

Q. PLC opto coupler

Function-6

Q. Hydrophore pump frequent start causes

Q. 4 ram hydraulic malfunction faults

Q. Centrifugal pump characteristics and mouth ring wear down causes and effects

Q. Turbocharger matching with main engine

Q. Turbocharger K Value

Q. Adjustment procedure

Q. Hydraulic line vlaves drawings

Q. Motor and pump flange alignment

Q. Refer system back pressure valve why?

Date – Unknown

External – Mohan Pal sir

Internal – Kamat sir

Function-3

Q. What is subdivisional loadline

Q. Define bulkhead deck is it same as freeboard deck

Q. How would u come to know on passenger ship the location of bulkhead deck if you are a layman.

Q. Difference between hypermist and sprinkler system

Q. Why we use hypermist in er and on deck sprinkler system

Function-4b, 6

Q. What is p and t alkilinity and high then what actions and if low what to do

Q. If p = t then is it acceptable and what that indicates

Q. Acidic corrosion in boiler

Q. Oxidation process in boiler

Q. Caustic corrosion and means to prevent

Q. Vit and super vit

Q. In conventional vit if one unit exhaust temp is high what adjust to make it low

Q. Clearances in gear pump how to measure and questions on the paper gasket between the gear casing.)

Q. what is clearance volume is it same as bumping clearance

Q. He asked the size of lead ball and what if the size ball is more will it mke any difference

Date – Unknown

Function-3

Q. Switch board safety

Q. Draw diagram of reverse power trip

Q. How to synchronize gen without

Q. Syncroscope, without lamp method and also without voltmeter

Q. All questions on generator parallel

Q. Like explain phase difference and what happen what is in phase

Q. Can it be possible in phase but phase diff

Q. Will syncroscope say about phase difference or in phase ? Does it shows speed or relative speed

Date – 10-02-2020

Function-3

Q. Techinal file details. What all components do you need to record?

Q. EEDI definition. What do you mean when you say EEDI

Q. MEPC 107(49)

Q. Sewage treatment plant tests and limits

Q. BDN? He wanted me to explain that declaration by supplier. Not just for Sulphur

Q. What is propeller theoretical speed, speed of advance and slip? Wake fraction?

Function-4b

Q. Sac volume. Why we have it. Are we reducing it now? Why? How is it reduced?

Q. RT flex rail pressure. How is it maintained? Why don’t we just let the pump pressurerize the rail and release Do you have helix on these fuel pumps? Why?

Q. Types of crankshaft? Is there a tolerance for the shrink fit for semi built? What is it?

Q. Is there a piston design for reducing NOx?

Q. How does the oros piston design help reduce Nox?

Q. Broken tie rod. How to remove?

Function-6

Q. I got new chemicals for boiler water testing. How do I make sure the concentration of the sulphuric acid or any other new chemical is correct?

Q. Lube oil test? How do you check viscosity?

Q. Hydraulic jacks process for removing cylinder head of generator? If my stud is already elongating why do I need to turn half a turn out before pressurizing?

Q. Dial guage alignment for pump and motor. Explain showing rough sketch

Date – 17-02-2020

Internal – Senthil sir

External – Iqbal sir

Function-3

Q. Parametric Rolling and conditions it occurs?

Q. Codes of ORB and How to make an entry?

Q. What is MLC and how does it affects you?

Q. What are security levels and who set’s it and what is DOS?

Q. ISM code what does chapter 10 tell you about?

Q. Cargo hold structures of bulk carrier , construction of side hopper tanks & top side tanks,  reason of their shape and function?

Q. Additional safety measures of bulk carrier regulations ?

Q. How to detect a crack in shell plating and how to report?

Q. CO2 emission, EEDI and required EEDI difference ?

Q. Curve of statical stability, and related questions?