FREE Tanker Familiarization Tanker Systems and Equipment Questions and Answers

Question 1

What is the primary safety function of the deck water seal in a tanker's inert gas (IG) system?

Accepted Answer

To act as a non-return device, preventing flammable cargo vapours from flowing back to the machinery space.

Answer

To cool the inert gas to the required temperature before it enters the cargo tanks.

Answer

To remove soot and sulfur oxides from the boiler flue gas using a series of sprays and baffles.

Answer

To increase the pressure of the inert gas using a venturi effect before it is distributed on deck.

Question 2

During the final stages of discharging a cargo tank, the main centrifugal cargo pump begins to lose suction and cavitate. Which system is specifically designed to efficiently remove the final quantities of cargo from the tank?

Accepted Answer

The stripping system.

Answer

The main ballast pump via a crossover connection.

Answer

A secondary high-capacity centrifugal pump.

Answer

The inert gas system by over-pressurizing the tank.

Question 3

Which of the following is the primary purpose of a Pressure/Vacuum (P/V) valve fitted on the vent line of a cargo tank?

Accepted Answer

To automatically relieve minor over-pressure or under-pressure, preventing structural damage to the tank.

Answer

To provide the main connection point for the shore vapor recovery hose.

Answer

To serve as the main emergency vent for releasing large volumes of gas during a fire.

Answer

To allow for manual ullaging and sampling of the cargo tank's contents.

Question 4

In a Crude Oil Washing (COW) system, what is used as the washing medium to clean the cargo tanks?

Accepted Answer

The cargo of crude oil itself.

Answer

High-pressure steam mixed with chemical additives.

Answer

Hot seawater heated to over 80°C.

Answer

A special nitrogen-based cleaning solvent.

Question 5

A tanker is loading cargo. An audible and visual alarm activates, indicating the tank level has reached 98% capacity. According to SOLAS requirements, this alarm must be triggered by a system that is what?

Accepted Answer

Independent of the primary tank level gauging system.

Answer

Directly integrated with the main cargo pump's emergency stop.

Answer

Calibrated and certified by the cargo surveyor before each operation.

Answer

Manually armed by the Chief Officer at the start of loading.

Question 6

Which of the following valve types is designed specifically to prevent the backflow of cargo in a pipeline, operating automatically without external actuation?

Accepted Answer

Check valve

Answer

Gate valve

Answer

Globe valve

Answer

Butterfly valve