class II

The part of iron and carbon alloy system line diagram representation of unalloyed iron and an interstitial compound, iron carbide (Fe3C), containing 6.67 percent carbon by weight is called iron-iron carbide equilibrium diagram. It...

Brinell hardness test Rockwell hardness test Vickers hardness test Pendulum test Charpy testI-zode test Fatigue test Bending test Non destructive Test VisualMicroscopyRadiographyDPTUltrasonicMagnetic particle Radiography Test DPT FatigueQuenchedGrindingOverloadImpactPorosityPin holesLack of fusion Steps used in the DPT  experiment: 1. Clean the surface with...

Twice in 5 years Open the boiler vent valve when pressure inside is just above the atm pressure to ensure that there is no vacuum in the boiler Allow the boiler to cool and...

Steering gear compartment must be separated from machinery spaces and readily accessible. Every vessel should be provided with main steering gear and auxiliary steering gear. The failure of one steering gear must not render the another one...

Checks on rudder in drydock When ship enters dry dock and pumping out water, check water whether water is coming out from rudder or not. If yes, then rudder is breached.Open the top and bottom plug and check...

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...

The fuel is supplied by the fuel pumps to the fuel injectors or fuel valves. For the fuel to burn completely at the correct time it should be broken up into tiny droplets in...

LMTD: it’s a logarithmic average of the temperature difference between the hot and the cold fluid stream at each end of the heat exchanger. The larger the value of LMTD,  higher the heat transfer rate Rate of heat transfer...

The variable delivery pump can run continuously in one direction, but have the cabpability of infinitely changeable discharge i.e., from zero to maximum in either direction.This is attained by changing the stroke of the pump piston....

How do ships get damaged? Compounded operator errors - Improper maintenance over time - Multiple improper procedures leading to collisions with ships, rocks,reefs, piers, etc.      Storms, hurricanes, etc. -Water on deck -Physical damage to...