While re-floating the vessel after dry dock, which of the following checks should be carried out?

Which of the following is not a method of cleaning a turbocharger, while it is in operation?

Which of the following valves are liable to open/close under the influence of fluid pressure if not in locked position?

Sacrificial anode on sea chest is to protect

Purifier leaking, bowl opened, cleaned n seal ring changed n put back bt still leaking wat might b wrong

NPSH and the Total suction head are two terms which are commonly used for pumps. Which of the following is a true statement?

After removing all the bonnet securing nuts of a large size globe valve it is found that the bonnet is coming out because of strong adhesion of the gasket between the bonnet and the body. What are you going to do in line with the best practices?(choose the best alternative)

A multistage centrifugal pump is normally used

Dezincification is the term used to describe

In a reciprocating pump the direction of flow depends upon:

Frige comp. Running continuously without cutout

Which of the following can cause exhaust with black smoke in a diesel engine? multi choice

Sea suction filter holes corroded and size increased, what can be done

Fixed vane type emergency fire pump priming vacuum pump. After one week fire pump not taking suction. The vacuum pump is engaging, but not developing vacuum in the suction side. What will be the cause?

In an electrochemical series the metals having higher negative potentials are placed on top, while those with lower negative potentials or positive potentials lie at the bottom. Which one of the following is a true statement?

When steel components electroplated with chromium are used in a corrosive Environment then

Your ship is plying in coastal waters in India which is muddy most of the time. Your main sea water pump shaft mechanical seal develops leak every time you are in a port and wears out very fast. What is the cause of the problem (choose the best alternative):

A reciprocating pump is used for Engine room bilge service because:

The steels with a carbon percentage close to 0.8% have

Why centrifugal p/p not provided with safety valve while positive displacement p/p is provided?

Fire side in boilers gets commonly corroded due to

Which of the following statements are true as far as painting of steel hull/structure is concerned? Multiple choice

Why is use of Polymer treatment restricted to low-pressure boilers?

Which of the following anodes in an ICCP can be used for comparatively higher current densities :-

Which of the following instruments is used to measure rudder carrier bearing wear down?

In M/E Lo Cooler, Lo Should Pass Through:

Noble metals are those which are placed at the

When securing a centrifugal distillate pump, which of the listed steps should be carried out FIRST?

Which of the following cannot be used as sacrificial anode for the protection of Mild steel structure against corrosion :

Auxiliary engine crank pin bearings are normally renewed:

Which one of the following methods of metal coating provides best protection against corrosion resistance:-

During auxiliary engine de-carbonization, which of the following checks need to be carried out?

Net Positive Suction Head is the

A centrifugal pump may fail to deliver water when first started if the

What is the best percentage of carbon content in stainless steel which allows welding?

Impingement corrosion can be best avoided during pipeline system design by

What to check if Engine is not taking load?

Auxiliary engine connecting rod bottom end bolts should be tightened

ship is in dry dock, stern tube seal renewal has been carried out, how will check for the leak

What is the purpose of the Bypass valve ( Automatic or Manual operated) on the positive displacement pump?

Double entry impellers have a distinct advantage over single entry impeller. What is it?

The function of an accumulator on the discharge side of a reciprocating bilge pump is to:

Non return v/v of m.s.w p/p is leaking on closed position, You hav a retutn type of v/v onboard of same dimension what will you do.

Throttling the discharge valve of a centrifugal pump the NPSHr

When centrifugal pump is changed over for pumping a liquid of higher specific gravity which of the following is going to change?

Sequence of metal in the increasing order of nobility in galvanic series

Before putting into operation a coalesce type Oily Water Separator, it is important to

When specified Discharge pressure is not achieved, The Possible cause could be?

Insulation Resistance testing of 3 phase induction motor is done

sea chest is to be cleaned and u found that the filter is stainless steal bucket type filter, inside which there is a zinc anode. The purpose of anode is to..................... and should be electrically................... with filter body.