why a positive displacement pump is called a self priming

why a positive displacement pump is called a self primingCentrifugal pump can not pull the liquid but it posh the liquid.priming means filling the...

EXPLAIN STROKE’S LAW

 explain Stokes law Stokes law give the mathematical equation that Express the settling velocity of a small particle in a fluid medium .  it is...

How drive electrical motor power is transmitted to purifier vertical shaft????

 drive electrical motor power is not directly transmitted to purifier SHAFT.  it actually transmitted by means of friction clutch arrangement.the motor shaft is equipped...

Scavenging

scavenging Scavengingwhat is  scavenging???? it is the process of removing exhaust gases from the cylinder after combustion and replenishing with fresh air known as scavenging.In a...

TYPES OF TANKER

TankerClassification:-4 types of tanker are recognised as:-Type A:- Oil tanker intended for the carriage in bulk of non boiling oil cargoes having a flash...

Salinometer

SalinometerSalino meter is a device which measures the impurity of water.The conductivity of water can be continuously tested by the salinometer.If the device registers...

Safe electrical practices

Safe electrical practiceWhat is safe watch keeping????Ans:-watchkeeping is an integral part of marine engineers duties on board ship.a lot of maintained work can be...

What action you will take if your motor is submerged in the sea water...

**first of all take out the motor  from sea water by isolating it from the connections and take it to the electrical workshop.---now measure the insulation...

WHAT IS MEGGER

What is Megger?It is an instrument used for measurement of insulation resistance so that electrical leakage is being recognised and that's why it is...

INTERVIEW QUESTION

List of questions Mitsui ask