CLASS, SURVEY, INSPECTIONS QUESTIONS & ANSWERS PART-6
Q. With reference to the PSC inspections, explain various codes used to represent Actions to be taken by the vessel against the deficiencies reported. Your IOPP equipment is not functional for the want of...
MOTOR & MEP ORAL QUESTIONS & ANSWERS PART-4
Q Hydrophore pump short cycling
Pressure switch faulty- check pressure switchPressure switch wrongly setNon return valve after pump leaking, hence water under pressure going back to storage tank- that would be indicated by monitoring of...
MOTOR & MEP ORAL QUESTIONS & ANSWERS PART-3
Q Explain Reefer system on the ships.
Main Components of the Refrigeration plants
Any refrigeration system works with different components inline to each other in the series. The main components are:
Compressor: Reciprocating single or two stage...
MOTOR & MEP ORAL QUESTIONS & ANSWERS PART-2
MARINE FUEL CONTAMINANTS
Water
Water, especially salt water, is objectionable in diesel fuel as it may cause injector and piston groove deposits and corrode engine components.Before burning the Fuel or blends are centrifuge to remove water...
QUESTION BANK MARINE ELECTRICAL TECHNOLOGY PART-1
Q The direct on line start of squirrel cage motor is used for most electrical drives on A.C powered ships.
Describe with sketches as necessary one method of overcoming each of the following Problems:
a) High...
LATEST ELECTRICAL TECHNOLOGY MMD ORAL Q & A PART-6
(a) Explain about BJT (Bipolar Junction Transistor),Uni-junction transistor.
(b) Describe about NPN and PNP transistor with sketch.
(c) Describe about Thyristor,GTO(gate turn off thyristor)
(d) Describe about MOSFET operation, Snubber circuit.
(a) BJT (Bipolar Junction Transistor)
Three terminal device,...
LATEST ELECTRICAL TECHNOLOGY MMD ORAL Q & A PART-5
Q Explain with the aid of sketch, the working principle of IGBT(Insulated Gate Bipolar Transistor) in varying motor speed control
This type of converter used for induction motor drives, uses transistors as switching devices.Unlike thyristors,...
Welding Basics
Now a days Ships are built by welding but up to 2 nd world war ie 1944 ships were built by riveting and welding was used only for the repair . However the welding...