class IV

Function-6 Surveyor - Banerjee & Rao sir Q. Safety precaution in Dry dock Q. Tig and Mig welding. Q. Vertical overhead welding precaution Q. Voltage transformer maintenance Q. How to pressure test dumb condenser? Q. Valve before seachest filter stuck. Actions? Q....

Types of Vibration Resonance is when Excitation frequency meets naturally frequency. Excitation –   Primary                       -  Secondary Primary Excitation : Combustion Forces                                   Rotating forces                                   Reciprocating forces these are part of engine specifications calculated in advance characteristics of engine at given...

Candidates should know about starting air explosion and crankcase explosion, causes, remedy and action. Q: What inspections is carried out on piston ring? i) Axial clearance . ii) Butt clearance iii) Ring thickness iv) Radial thickness v) Ring tension Q: What...

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...

The main engine is fitted on the ship’s hull with the help of holding down bolts and chocks. The floor where the engine is installed is excessively strengthened by heavy flooring and using additional bars and girders....

There has been too much puzzle with regards to the notations used for the Marine Diesel Engines. One can consult the engine manual & find out what such notations means. However, this article will provide explanation for...

What is Virtual Tappet? Unlike Aux Engines which have a manual tappet to adjust, there must be a tappet clearance for the Main Engine as well. But with the absence of a rocker arm...

1. Oil consumption High Causes: Low level alarm is triggered due to oil leakage.May result in system being isolated if low low alarm is trigerred. Remedial Actions: Rectify the leakage at the earliest.Isolate the system if leakage is very...

In 1973, IMO acquired the International Convention for the Prevention of Pollution from Ships, now known universally as MARPOL, which has been amended by the Protocols of 1978 and 1997 and kept updated with...

General emergency alarm signal : Seven or more short blast followed by one long blast Emergency:- Immediate Action Required/Members of The Team Fire and Explosion:- Raise fire alarmDetermine location of fire/explosionCheck for oil/hazardous substances pollution and possibility of...