Tanker Familiarization Tanker Systems and Equipment 2

Question 1

What is the primary purpose of a tanker's inert gas system (IGS)?

Accepted Answer

To maintain a non-flammable atmosphere in cargo tanks

Answer

To cool the cargo during transit

Answer

To pressurize cargo tanks for faster discharge

Answer

To filter impurities from the cargo

Question 2

Which valve type is most commonly used as a master isolation valve on a tanker's cargo manifold?

Accepted Answer

Gate valve

Answer

Globe valve

Answer

Needle valve

Answer

Ball valve

Question 3

On a product tanker, what does a 'deep-well pump' refer to?

Accepted Answer

A submersible pump mounted inside the cargo tank

Answer

A pump located in the engine room bilges

Answer

A pump that draws cargo from shore storage wells

Answer

A high-pressure pump used for ballast stripping

Question 4

What is the function of a pressure/vacuum (P/V) valve on a cargo tank?

Accepted Answer

To protect the tank from overpressure or excessive vacuum

Answer

To regulate pump discharge pressure

Answer

To control ballast water flow

Answer

To measure cargo quantity

Question 5

What material is typically used for cargo hoses when transferring petroleum products to prevent static buildup?

Accepted Answer

Electrically bonded hoses with a conductive wire

Answer

Standard rubber with no conductive lining

Answer

Reinforced PVC hose

Answer

Bare steel flexible pipe

Question 6

Which instrument is used to measure the oxygen content inside a cargo tank before entry?

Accepted Answer

Electrochemical oxygen analyzer

Answer

Hydrometer

Answer

Colorimetric tube detector

Answer

Catalytic bead combustible gas detector

Question 7

What is a 'Butterworth opening' on a tanker?

Accepted Answer

A fixed access port used to insert tank cleaning machines

Answer

An emergency escape hatch on the deck

Answer

A pressure relief fitting on the vapor line

Answer

A sight glass for monitoring cargo level