What is difference between hyper mist and sprinkler system? Hyper mist :- It use fresh waterIt activate when two different detectors activated.Pressure required for hyper mist is more as compare to sprinkler system.Droplet size of hyper mist is small Sprinkler System :- It uses Sea waterSprinkler

What do you mean by painting? The inward and outward movement of the shell plating is referred to as the panting and its type of stress to which the ship is subjected. The term painting also related to boiler. What do you mean painting of boiler ? When there is less oxygen or insufficient air,

What is TPA and Anti-exposure suit in personal life saving appliances ? Tpa means Thermal protective aid. Thermal protection aid (TPA ) is a bag of suit made up of water proof material with low thermal conductivity. Anti exposure Suit is protective suit, which is designed f

Why concentric springs fitted for auxillary engine cylinder head? Concentric springs fitted in the cylinder head of the auxillary engine , which helps to open and close the exhaust and suction valve . The reasons for Concentric springs in the exhaust and suction valves are as follows:- If one sprin

In this Article, I have Explained Why discharge valve closed during starting of centrifugal pump ? Or Why centrifugal pump started with closed discharge valve ? let us first understand through characteristics curve of centrifugal pump A centrifugal pumps usually started with discharge valves shut.

AIR IN THE STEERING GEAR SYSTEM WILL LEAD TO HUNTING THE STEERING GEAR. HENCE REMOVAL OF AIR IS THE NECESSITY FOR PROPER FUNCTION OF STEERING GEAR AND SAFE NAVIGATION. FOR REMOVING AIR FROM THE SYSTEM following procedure is carried out :- SET THE STEERING GEAR IN MECHANICal HANDLE OPERATION. CL

The Back pressure valve fitted in the refrigeration system is a spring loaded non-return valve. It is fitted just in a multi temperature rooms system at the point of exit of the refrigerant from the evaporator coil . This valve is being fitted at the exit of the compartments which temperature is s

The basic principle of SONIC CLEANING is to create a sound wave with an energy level that exceeds the forces that tend to cause particles suspended in a gas flow to adhere to each other and surrounding surfaces, i.e. preventing by breaking up the build – up particles before they form a hard l

Pinch point in Exhaust gas boiler is difference b/w the temperature of of exhaust gas leaving the suction of evaporator and the saturated steam. If the pinch Point is lower then the efficiency of the exhaust boiler ( E.G.B ) is higher.It is achieved by having a higher heat surface area. But if surf

Air compressor is used for production of compressed air and this compressed air is used on ship to start the main engine and services also. To increase air compressor efficiency we need to carried out following steps : From veg room in ship,an air duct can be brought for providing cool air which wi

What is blind disc in purifier? Its function? Blind Disc means the disc is blind. It means there is no holes in the disc. It is used to convert the purifier into clarifier. It is inserted at the bottom of the disk stack, because there are no holes.

In this Article,we will learn What is the Angle of Contraflexure ? What is angle of Contraflexure ? This is the angle at which the curve goes / moves from concave to convex. Or It is the angle of heel up to which the rate of righting lever ( GZ ) With the heel is changes I.e Before this point

What is the Difference between Heavy fuel oil and marine diesel oil ? Or What is the difference between HFO and MDO ? Heavy fuel oil (HFO ) Viscosity MoreLess costierIt is last product of fractional distillationMore temperature required for burning Marine Diesel Oil (MDO ) Viscosity lessCostlyI

When steering gear is set to the required position, the rudder is moved and when the rudder reaches to the required position, the steering gear must be set to off position.  And this is done by three solenoid valve.

What are the difference b/w a Lube oil and a Fuel oil (LO & FO) purifier? The main difference is that Lube oil (LO )purifier is used mainly for the separation of water and the fuel oil (FO ) purifer used mainly for the separation of sludge. Thus, Fuel oil (FO ) purifier run as clarifier in the

How you will come to know exhaust valve in sulzer is rotating or not? A spring-loaded rod float on the top of the air piston, and move up and down with respect the air piston, in the air piston pheriphery extruded surface is designed so that when the rod passes over this extruded surface it moves m

How to test high and low pressure cut out of refrigerator compressor? Low Pressure (LP ) cutout- Just close the outlet valve of the condenser and the compressor will cut out at low pressure as the supply of the refrigerant is hindered. High Pressure (HP ) Cut Out :-  It is tested by lowering the se

meo class 4 electrical oral questions and answers Electrical Marine Electro Technology Written Salvaging of Motor What action you will take if your motor is submerged in the sea water and you want to revive it? Servicing a motor effected/washed by seawater Windlass safety device: View Answe

In this article we will learn about Hot Extrusion Process, its different types, how it works and what are its applications. What is Hot Extrusion ? Hot Extrusion is a Process to provide the desired form of the finished part through a billet or slug of metal which is forced by high pressure throu

In this article we are going to discuss about Fits, types of fits and their sub types, Classification of Fits under Newall System, How to Name Different Types of Fit in Mechanical Engineering. What is Fit ? The relationship between two parts where one is inserted into the other with a certain de